Mcq workshop

Mechanical EngineeringMCQof Workshop
1. Surface plate is used to check the trueness offlat surfaces.
A. True
B. False
Answer: Option A
2. A zinc diffusion process is called
A. galvanising
B. anodising
C. parkerising
D. sherardizing
Answer: Option D
3. The accuracy of micrometers,calipers,dial indicators can be checked by a
A. feeler gauge
B. slip gauge
C. ring gauge
D. plug gauge
Answer: Option B
4. The type of file used for a wood work is
A. single-cutfile
B. double cut file
C. rasp-cutfile
D. any one of these
Answer: Option C
5. A taper provided on the pattern for its easyand clean withdrawl from the mould is known as
A. machining allowance
B. draft allowance
C. shrinkage allowance
D. distortion allowance
Answer: Option B
6. In arc welding,the electric arc is produced between the work and the electrode by
A. voltage
B. flow of current
C. contact resistance
D. all of these
Answer: Option C
7. In a centrifugal casting method
A. core is made ofsand
B. core is made offerrous metal
C. core is made ofnon-ferrous metal
D. no core is used

Answer: Option D
8. The draft or taper allowance on casting is generally
A. 1 to 2 mm/m
B. 2 to 5 mm/m
C. 5 to 10 mm/m
D. 10 to 15 mm/m
Answer: Option A
9. Which of the following welding process uses non-consumable electrodes?
A. TIG welding
B. MIG welding
C. Manual arc welding
D. Submerged arc welding
Answer: Option A
10. In a bilateral system oftolerance, the tolerance is allowed on
A. one side of the actual size
B. one side of the nominal size
C. both sides ofthe actual size
D. both sides ofthe nominal size
Answer: Option D
11. In a hot chamber die casting machine
A. ferrous alloys with low melting temperature are casted
B. ferrous alloys with high melting temperature are casted
C. non-ferrous alloys with low melting temperature are casted
D. non-ferrous alloys with high melting temperature are casted
Answer: Option C
12. The chisel used for cutting key ways is
A. flat chisel
B. cape chisel
C. round nose chisel
D. diamond pointed chisel
Answer: Option B
13. The temperature atwhich the new grains are formed in the metal is called
A. lower critical temperature
B. upper critical temperature
C. eutectic temperature
D. recrystallisation temperature
Answer: Option D
14. Thread rolling is restricted to
A. ferrous materials
B. ductile materials
C. hard materials
D. none of these

Answer: Option B
15. In sheetmetal blanking,shear is provided on punches and dies so that
A. press load is reduced
B. good cut edge is obtained
C. warping of sheetis minimised
D. cut blanks are straight
Answer: Option A
16. In welding copper alloys with TIG arc welding
A. direct currentwith straightpolarity is used
B. direct currentwith reversed polarity is used
C. alternating currentis used
D. any one of these
Answer: Option A
17. The algebraic difference between the minimum limitand the basic size is called
A. actual deviation
B. upper deviation
C. lower deviation
D. fundamental deviation
Answer: Option C
18. The temperature ofoxy-hydrogen flame is __________ oxy-acetylene flame.
A. same as
B. less than
C. more than
Answer: Option B
19. Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?
A. Drawing
B. Extrusion
C. Rolling
D. Extrusion and rolling
Answer: Option D
20. A saw which cuts wood during the return stroke of the saw is known as
A. push saw
B. pull saw or draw saw
Answer: Option B
21. The low pressure acetylene is produced atthe welding site by the chemical reaction between water and calcium
carbonate.
A. Correct
B. Incorrect
Answer: Option B
22. The fullers are used
A. for finishing flatsurfaces
B. for necking down a piece of work
C. for punching a hole

D. to finish the punched hole
Answer: Option B
23. The cold chisels are made by
A. drawing
B. rolling
C. piercing
D. forging
Answer: Option D
24. The property of sand due to which it evolves a great amountof steam and other gases is called
A. collapsibility
B. permeability
C. cohesiveness
D. adhesiveness
Answer: Option B
25. The centrifugal casting method,is used for casting articles of
A. symmetrical shape aboutvertical axis
B. symmetrical shape abouthorizontal axis
C. irregular shape
D. non-ferrous metal only
Answer: Option B
26. Metal patterns are used for
A. small castings
B. large castings
C. complicated castings
D. large scale production ofcastings
Answer: Option D
27. The instrumentwhich has all the features of try-square,bevel protractor, rule and scriber,is
A. outside micrometer
B. inside micrometer
C. depth gauge micrometer
D. combination set
Answer: Option D
28. When a hole or cavity to be cored is not in line with the parting surface,then a __________ is used.
A. horizontal core
B. vertical core
C. drop core
D. balanced core
Answer: Option C
29. The bloom is smaller than a billet.
A. True
B. False
Answer: Option B
30. In average work, the tolerance produced by investmentcasting method is

A. ±0.05 mm
B. +0.2 mm
C. +05 mm
D. +1 mm
Answer: Option A
31. The purpose ofa riser is to
A. deliver molten metal into the mould cavity
B. act as a reservoir for the molten metal
C. feed the molten metal to the casting in order to compensate for the shrinkage
D. deliver the molten metal from pouring basin to gate
Answer: Option C
32. The blank diameter used in thread rolling will be
A. equal to minor diameter ofthe thread
B. equal to pitch diameter ofthe thread
C. a little larger than the minor diameter ofthe thread
D. a little larger than the pitch diameter of the thread
Answer: Option C
33. The cross-section ofa chisel is usually
A. rectangular
B. square
C. hexagonal
D. octagonal
Answer: Option D
34. A plug gauge is used to check the diameter ofshafts and studs.
A. Correct
B. Incorrect
Answer: Option B
35. In back-hand welding,the angle between the welding torch and the work is kept as
A. 30°-40°
B. 40°-50°
C. 50°-60°
D. 60°-70°
Answer: Option B
36. The machining allowance provided on patterns depends upon
A. type of casting metal
B. size and shape ofcasting
C. method of casting used
D. all of these
Answer: Option D
37. In submerged arc welding,an arc is produced between a
A. carbon electrode and the work
B. metal electrode and the work

C. bare metal electrode and the work
D. two tungsten electrodes and the work
Answer: Option C
38. In shielded arc welding
A. large electrode is used
B. welding rod coated with slag is used
C. welding rod coated with fluxing material is used
D. none of the above
Answer: Option C
39. In a die casting method,the molten metal is forced into mould under high pressure.
A. Correct
B. Incorrect
Answer: Option A
40. In a centrifugal casting method,the impurities are collected in the centre of the casting.
A. Yes
B. No
Answer: Option A
41. In a hot chamber die casting machine
A. melting potis separate from the machine
B. melting potis an integral partof the machine
C. melting potmay have any location
D. high temperature and pressure is used
Answer: Option B
42. The electrodes used in spotwelding have a tip of
A. stainless steel
B. aluminium
C. copper
D. brass
Answer: Option C
43. Blanking and piercing operations can be performed simultaneouslyin a
A. simple die
B. progressive die
C. compound die
D. combination die
Answer: Option C
44. A pattern maker's shrinkage rule considers
A. all pattern allowances
B. only shrinkage allowance
C. all materials to be cast
D. all materials ofthe pattern
Answer: Option B
45. The tolerance produced by shell moulding process ofcasting is

A. +0.05 mm
B. ±0.2 mm
C. +0.5 mm
D. ±1 mm
Answer: Option B
46. Galvanising is a
A. zinc diffusion process
B. process ofcoating zinc by hot dipping
C. process used for making thin phosphate coating on steel
Answer: Option B
47. The ferrous metals require more machining allowance than non-ferrous metals.
A. True
B. False
Answer: Option A
48. In a four high rolling mill,there are four rolls outof which
A. one is working roll and three are backing up rolls
B. two are working rolls and two are backing up rolls
C. three are working rolls and one is backing up roll
D. all of the four are working rolls
Answer: Option B
49. When a pattern is made in three parts, the bottom part is known as a cope.
A. True
B. False
Answer: Option B
50. In __________ welding,the weld may be made either from left to right or from right to left.
A. fore-hand
B. back-hand
C. vertical
Answer: Option C
51. In a unilateral system oftolerance,the tolerance is allowed on
A. one side of the actual size
B. one side of the nominal size
C. both sides ofthe actual size
D. both sides ofthe nominal size
Answer: Option B
52. A two high rolling mill consists oftwo rolls which rotate
A. at the same speed and in the same direction
B. at the same speed butin opposite direction
C. at different speeds and in the same direction
D. at different speeds and in the opposite direction
Answer: Option B
53. Carburising flame is used to weld

A. steel,castiron, copper,aluminium etc
B. brass and bronze
C. hard surfacing materials such as stellite
D. all of these
Answer: Option C
54. The electrode tip diameter (d) in spot welding should be equal to (where t = Thickness of plate to be welded)
A. t
B. 1.5 t
C. 3 t
D. 6 t
Answer: Option A
55. For obtaining a cup of diameter 25 mm and height15 mm by drawing,the size of the round blank should be
approximately
A. 42 mm
B. 44 mm
C. 46 mm
D. 48 mm
Answer: Option C
56. Cores are used to
A. form internal cavities in the casting
B. improve mould surface
C. form a part of a green sand mould
D. all of these
Answer: Option D
57. The drawing down is a process of__________ the cross -section ofa bar.
A. increasing
B. reducing
Answer: Option B
58. During hot working of metals
A. poor surface finish is produced
B. scale is formed on the metal surface
C. close tolerances can notbe maintained
D. all of these
Answer: Option D
59. When a pattern is made in three parts, the __________ is known as a drag.
A. bottom part
B. middle part
C. top part
Answer: Option A
60. Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.
A. Agree
B. Disagree
Answer: Option A

61. A jolt machine is used to
A. ram the sand harder at the pattern face with decreasing hardness towards the back of the mould
B. ram the sand harder at the back of the mould and softer on the pattern face
C. produce uniform sand hardness throughoutthe mould
D. produce uniform packing ofsand in the mould
Answer: Option A
62. If the sand is too fine, its permeabilitywill be high.
A. True
B. False
Answer: Option B
63. Which of the following statementis wrong?
A. The mortise gauge has two scribing pins.
B. The gouges are chisels with a hollow shaped blade.
C. An auger is a planing tool
D. all of these
Answer: Option C
64. In a compound die
A. only one operation is performed ateach stroke of the ram
B. two or more operations are performed simultaneouslyat the single stroke ofthe ram
C. two or more cutting operations are performed atone station of the press in every stroke of the ram
D.
both cutting and non-cutting operations are performed atone station ofthe press in every stroke of the
ram
Answer: Option C
65. A file removes the metal during
A. forward stroke
B. return stroke
C. both forward and return strokes
D. none of these
Answer: Option A
66. In spotwelding,the spacing between two spotweld should notbe less than
A. d
B. 1.5 d
C. 3 d
D. 6 d
Answer: Option C
67. Aluminium is the bestmaterial for making patterns because itis
A. lightin weight
B. easy to work
C. corrosion resistant
D. all of these
Answer: Option D
68. Gagger is used for cleaning the moulding sand.
A. Correct

B. Incorrect
Answer: Option B
69. In sheetmetal work, the cutting force on the tool can be reduced by
A. grinding the cutting edges sharp
B. increasing the hardness oftool
C. providing shear on tool
D. increasing the hardness ofdie
Answer: Option A
70. In order to get uniform thickness ofthe plate by rolling process,one provides
A. camber on the rolls
B. offset on the rolls
C. hardening ofthe rolls
D. antifriction bearings
Answer: Option C
71. A pouring basin acts as a reservoir for the molten metal.
A. Agree
B. Disagree
Answer: Option A
72. In bending operation,the metal takes the shape ofa punch.
A. Yes
B. No
Answer: Option A
73. The cold working of metals is carried out
A. at the recrystallisation temperature
B. below the recrystallisation temperature
C. above the recrystallisation temperature
D. at any temperature
Answer: Option B
74. Lancing is the operation of
A. cutting a sheetof metal in a straightline along the length
B. removal of metal to the desired shape from the edge of a plate
C. cutting a sheetof metal through part of its length and then bending the cut portion
D. bending a sheetof metal along a curved axis
Answer: Option C
75. Notching is the operation of
A. cutting a sheetof metal in a straightline along the length
B. removal of metal to the desired shape from the edge of a plate
C. cutting a sheetof metal through part of its length and then bending the cut portion
D. bending a sheetof metal along a curved axis
Answer: Option B
76. The shrinkage allowance for castiron pattern is
A. 10 mm/m

B. 16 mm/m
C. 20 mm/m
D. 26 mm/m
Answer: Option A
77. An oxidising flame is obtained when equal volumes ofoxygen and acetylene are supplied.
A. True
B. False
Answer: Option B
78. A neutral flame is obtained by supplying
A. equal volumes ofoxygen and acetylene
B. more volume of oxygen and less volume of acetylene
C. more volume of acetylene and less volume ofoxygen
Answer: Option A
79. An oxidising process used for aluminium and magnesium articles is called
A. galvanising
B. anodising
C. parkerising
D. sheradising
Answer: Option B
80. For welding plates ofthickness less than 5 mm,its edges
A. do not require bevelling
B. should be bevelled to a single-Vor U-groove
C. should have a double-Vor U-groove on one side
D. should have a double-Vor U-groove on both sides
Answer: Option A
81. In order to cut mild steel,the cutting angle of chisel should be
A. 30°
B. 45°
C. 50°
D. 60°
Answer: Option D
82. The operation of straightening a curved sheetmetal,is known as
A. drawing
B. squeezing
C. coining
D. planishing
Answer: Option D
83. The correct sequence for preparing a billetfor extrusion process is pickling,alkaline cleaning,phosphate coating
and lubricating with reactive soap.
A. Yes
B. No
Answer: Option A

84. Tandem drawing ofwires and tubes is necessarybecause
A. it is not possible to reduce atone stage
B. annealing is needed between stages
C. accuracy in dimensions is notpossible otherwise
D. surface finish improves after every drawing stage
Answer: Option B
85. In a __________ ,both cutting and non-cutting operations are performed atone station of the press in every
stroke of the ram.
A. simple die
B. progressive die
C. combination die
D. compound die
Answer: Option C
86. Cold working requires much higher pressure thathotworking.
A. Correct
B. Incorrect
Answer: Option A
87. The operation of bending a sheetof metal along a curved axis, is known as
A. plunging
B. notching
C. slitting
D. forming
Answer: Option D
88. In a __________ ,two or more operations are performed simultaneouslyat the single stroke ofthe ram.
A. simple die
B. progressive die
C. combination die
D. compound die
Answer: Option B
89. A rip saw
A. is a two man saw
B. is used for cutting along the grains of wood
C. has a narrow blade with two wooden handles
D. all of the above
Answer: Option B
90. The welding setup is said to have reversed polarity when the work is connected to the negative terminal and the
electrode holder to the positive terminal.
A. Agree
B. Disagree
Answer: Option A
91. For welding plates ofthickness more than 12.5 mm,its edges
A. do not require bevelling
B. should be bevelled to a single-Vor U-groove

C. should have a double-Vor U-groove on one side
D. should have a double-Vor U-groove on both sides
Answer: Option D
92. In electric resistance welding,voltage required for heating is
A. 1 to 5 volts
B. 6 to 10 volts
C. 11 to 20 volts
D. 50 to 100 volts
Answer: Option B
93. Most of the oxy-acetylene welding is done with
A. neutral flame
B. oxidising flame
C. carburising flame
D. all of these
Answer: Option A
94. The cutting edge of a chisel should be
A. hardened
B. tempered
C. hardened and tempered
D. case hardened
Answer: Option C
95. Scab is a casting defectwhich occurs as sand patches on the upper surface of a casting.
A. True
B. False
Answer: Option A
96. In order to check the clearance between two mating surfaces,a __________ gauge should be used.
A. ring
B. plug
C. feeler
Answer: Option C
97. When the weld is made from left to right, it is known as back-hand welding.
A. Agree
B. Disagree
Answer: Option A
98. The current in electric resistance welding can be regulated by
A. varying the inputsupply
B. changing the primaryturns of the transformer
C. changing the secondaryturns of the transformer
D. any one of the above
Answer: Option B
99. In a cold chamber die casting machine,onlynon-ferrous alloys with __________ are casted.
A. low melting temperature
B. high melting temperature

Answer: Option B
100.A mortise gauge is a
A. striking tool
B. planing tool
C. boring tool
D. marking tool
Answer: Option D
101. The casting method adopted for ornaments and toys of non-ferrous alloys,is
A. permanent mould casting
B. slush casting
C. die casting
D. centrifugalcasting
Answer: Option B
102. In a cold chamber die casting machine
A. melting pot is separate fromthe machine
B. melting pot is an integral part of the machine
C. melting pot may have any location
D. low temperature and pressure is used
Answer: Option A
103. Structural sections such as rails,angles,I-beams are made by
A. hot rolling
B. hot draw ing
C. hot piercing
D. hot extrusion
Answer: Option A
104. The minimum size ofa billetis 10 cm x 10 cm.
A. Agree
B. Disagree
Answer: Option B
105. In welding magnesium with TIG arc welding,directcurrent with __________ is used.
A. straight polarity
B. reversed polarity
Answer: Option B
106. Cutting and forming operations can be performed in a single operation in a

A. simple die
B. progressive die
C. compound die
D. combination die
Answer: Option D
107. The teeth of hacksaw blade are bent
A. tow ardsright
B. tow ardsleft
C. alternately tow ards right and left and every third or fourth left straight
D. may be bent in any direction
Answer: Option C
108. In a cold chamber die casting machine,a measured quantityof molten metal is broughtin a ladle from the
melting potto a chamber and forced into the closed die-section byapplying hydraulic pressure upon the plunger.
A. Correct
B. Incorrect
Answer: Option A
109. For cutting brass,the hacksaw blade should have __________ teeth per 25 mm.
A. 14
B. 24
C. 32
D. 40
Answer: Option A
110. A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as
A. shift
B. sand w ash
C. sw ell
D. scab
Answer: Option B
111. The cold chisels are made from
A. cast iron
B. mild steel

C. high speed steel
D. cast tool steel
Answer: Option D
112. To prevent the body of the blade from jamming in the saw cut, the teeth of blade are
A. strengthened
B. sharpened
C. set
D. all of these
Answer: Option C
113. A ring gauge is used to
A. checkthe diameter of shafts or studs
B. test the accuracy of holes
C. checkthe clearance between two mating surfaces
D. all of the above
Answer: Option A
114. A casting defect which results in general enlargementofa casting is known as
A. shift
B. sand w ash
C. sw ell
D. scab
Answer: Option C
115. Rotary swaging
A. is extensively used for making bolts and rivets
B. is used for reducing the diameters of round bars and tubes by rotating dies w hich open and close rapidly on the w ork
C. is used to improve fatigue resistance of the metal by setting up compressive stressesin its surface
D.
consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to
provide the desired formof the finished part
Answer: Option B
116. The operation of cutting a number of holes evenly spaced in a regular pattern on a sheetof metal is.called
perforating.
A. Agree

B. Disagree
Answer: Option A
117. The metal is subjected to mechanical working for
A. refining grain size
B. reducing original block into desired shape
C. controlling the direction of flow lines
D. all of these
Answer: Option D
118. During hot working of metals
A. porosity of the metal is largely eliminated
B. grain structure of the metal is refined
C. mechanical properties are improved due to refinement of grains
D. all of the above
Answer: Option D
119. The electron beam welding can be carried out in
A. open air
B. a shielded gas environment
C. vacuum
D. a pressurised inert gas chamber
Answer: Option C
120. In tungsten-inertgas arc welding,a __________ electrode is used.
A. consumable
B. non-consumable
Answer: Option B
121. The operation of cutting a cylindrical hole in a sheetof metal by the punch and die is called
A. shearing
B. piercing
C. punching
D. blanking
Answer: Option B
122. In die casting,machining allowance is

A. small
B. large
C. very large
D. not provided
Answer: Option D
123. The welding setup is said to have straightpolarity, when
A. w orkis connected to the positive terminal and the electrode holder to the negative terminal
B. w orkis connected to the negative terminal and the electrode holder to the positive terminal
C. w orkis connected to the positive terminal and the electrode holder is earthed
D. w orkis connected to the negative terminal and the electrode holder is earthed
Answer: Option A
124. A moving mandrel is used in
A. w iredrawing
B. tube draw ing
C. metal cutting
D. forging
Answer: Option B
125. The mostpreferred process for casting gas turbine blades is
A. die casting
B. shell moulding
C. investment moulding
D. sand casting
Answer: Option B
126. The upsetting is a process of
A. increasing the cross-section of a bar
B. reducing the cross-section of a bar
C. joining the tw o surfaces of metalunder pressure after heating
D. bending of a bar
Answer: Option A
127. If neutral flame is used in oxy-acetylene welding,both oxygen and acetylene cylinders of the same capacitywill
be emptied atthe same time.

A. Correct
B. Incorrect
Answer: Option A
128. Which of the following material can be used for making patterns ?
A. Aluminium
B. Wax
C. Lead
D. all of these
Answer: Option D
129. The torch used for oxygen cutting is same as for oxy-acetylene welding.
A. Yes
B. No
Answer: Option B
130. According to Indian standards,the total number oftolerance grades are
A. 8
B. 12
C. 18
D. 20
Answer: Option C
131. Loam sand is a mixture of
A. 30% sand and 70% clay
B. 50% sand and 50% clay
C. 70% sand and 30% clay
D. 90% sand and 10% clay
Answer: Option B
132. A three high rolling mill consists ofthree rolls placed one above the other. Which of the following statementis
correct?
A. The upper and middle rolls rotate in the same direction w hereasthe bottom roll rotates in opposite direction.
B. The upper and bottom rolls rotate in the same direction w hereas the middle roll rotate in opposite direction.
C. The bottom and middle roll rotate in the same direction.
D. any one of the above

Answer: Option B
133. The oxy-acetylene gas used in gas welding produce a flame temperature of
A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C
Answer: Option D
134. Metal patterns require __________ draftallowance than wooden patterns.
A. more
B. less
Answer: Option B
135. For gas welding,the presure desired atthe welding torch for acetylene is
A. 7 to 103 kN/m2
B. 70 to 280 kN/m2
C. 280 to 560 kN/m2
D. 560 to 840 kN/m2
Answer: Option A
136. The process extensivelyused for making bolts and nuts is
A. hot piercing
B. extrusion
C. cold peening
D. cold heading
Answer: Option D
137. Spot welding is used for welding
A. lap joints in plates having 0.025 mm to 1.25 mm thickness
B. lap joints in plates having thickness above 3 mm
C. butt joints in plates having 0.025 mm to 1.25 mm thickness
D. butt joints in plates having thickness above 3 mm
Answer: Option A
138. Thermitwelding is often used in
A. replacing broken gear teeth

B. repairing broken shears
C. joining rails, truckframes and locomotive frames etc.
D. all of the above
Answer: Option D
139. The directional solidification in casting can be improved by using
A. chills and chaplets
B. chills and padding
C. chaplets and padding
D. chills, chaplets and padding
Answer: Option B
140. A sand employed on the faces of the pattern before moulding,is called
A. green sand
B. dry sand
C. loam sand
D. parting sand
Answer: Option D
141. Which of the following statementis wrong?
A. The angular clearance on dies varies from0.5°to 1°.
B. In draw ing operation, the metal flow s due to plasticity.
C. In press operation, the size of the pierced hole is independent of the size of punch.
Answer: Option D
142. When two metal pieces ofdifferent thicknesses are to be welded by projection welding,then the projections
should be made on __________ metal piece.
A. thinner
B. thicker
Answer: Option B
143. In fore-hand welding,the angle between the welding rod and the work is kept as
A. 30°-40°
B. 40°-50°
C. 50°-60°

D. 60°-70°
Answer: Option A
144. The minimum size ofa bloom is
A. 5 cm x 5 cm
B. 10 cm x 10 cm
C. 15 cm x 15 cm
D. 20 cm x 20 cm
Answer: Option C
145. The binder commonlyused in making oil sand,is
A. clay-type binder
B. organic-type binder
C. inorganic-type binder
D. any one of these
Answer: Option B
146. The material which can be best cut with oxygen cutting process is
A. mild steel
B. brass
C. copper
D. aluminium
Answer: Option A
147. In fore-hand welding,the weld is made
A. fromleft to right
B. fromright to left
C. first fromleft to right and then fromright to left
D. either fromleft to right or from right to left
Answer: Option B
148. In spotwelding,the distance between the nearestedge ofthe plate and centre of weld should be equal to
A. d
B. 1.5 d
C. 3 d

D. 6 d
Answer: Option B
149. Thermit,used in thermitwelding,is a mixture of
A. charcoaland iron oxide
B. charcoaland aluminium
C. iron oxide and aluminium
D. charcoal, iron oxide and aluminium
Answer: Option C
150. The width of slotcut by a hacksaw blade is __________ the width of the blade.
A. equal to
B. less than
C. greater than
Answer: Option C
151. A basic shaftis one whose
A. low er deviation is zero
B. upper deviation is zero
C. low er and upper deviations are zero
D. none of these
Answer: Option B
152. A file with 20 teeth in 25 mm is called
A. rough file
B. bastard file
C. second cut file
D. smooth file
Answer: Option A
153. The flux commonlyused in brazing is
A. zinc chloride
B. ammonium chloride
C. rosin plus alcohol
D. borax
Answer: Option D

154. The increase in hardness due to cold working,is called
A. age-hardening
B. w ork-hardening
C. induction hardening
D. flame hardening
Answer: Option B
155. When a pattern is made in three parts, the top part, is known as a
A. drag
B. cheek
C. cope
D. none of these
Answer: Option C
156. In a __________ ,the molten metal is poured and allowed to solidifywhile the mould is revolving.
A. die casting method
B. slush casting method
C. permanent mould casting method
D. centrifugal casting method
Answer: Option D
157. Riddle is used for
A. smoothing and cleaning out depressions in the mould
B. cleaning the moulding sand
C. moistening the sand around the edge before removing pattern
D. reinforcement of sand in the top part of moulding box
Answer: Option B
158. A hacksaw blade cuts on the
A. forward stroke
B. return stroke
C. both forward and return strokes
D. cutting depends upon the direction of force
Answer: Option A
159. The oxygen cylinder is usuallypainted with

A. black colour
B. w hite colour
C. maroon colour
D. yellow colour
Answer: Option A
160. Which of the following welding method uses a pool of molten metal?
A. Carbon arc w elding
B. Submerged arc w elding
C. TIG arc w elding
D. MIG arc w elding
Answer: Option B
161. In fore-hand welding,the angle between the welding torch and the work is __________ as compared to back-
hand welding.
A. same
B. less
C. more
Answer: Option B
162. The advantage of thermitwelding is that
A. all parts of the w eld section are molten at the same time
B. w eld cools almost uniformly
C. results in a minimum problem w ith internalresidual stresses
D. all of the above
Answer: Option D
163. A gimletis a __________ tool.
A. boring
B. marking
Answer: Option A
164. Slick is used for repairing and finishing the mould.
A. Correct
B. Incorrect
Answer: Option A
165. The maximum flame temperature occurs

A. at the outer cone
B. at the inner cone
C. betw een the outer and inner cone
D. at the torch tip
Answer: Option B
166. During cold working process
A. grain structure is distorted
B. strength and hardness of metal increases
C. close dimensional tolerance can be maintained
D. all of the above
Answer: Option D
167. When filing softmetals,the file teeth are clogged with minute particles ofmetal.The file should be cleaned by
A. w ashing it w ith water
B. rubbing on w ood
C. w ashing it w ith dilute acid
D. using file card
Answer: Option D
168. In back-hand welding,the angle between the welding rod and the work is __________ as compared to fore -hand
welding.
A. same
B. less
C. more
Answer: Option A
169. Lap joints are employed on plates having thickness
A. less than 3 mm
B. 5 to 10 mm
C. 12.5 mm
D. above 25 mm
Answer: Option A
170. A large electrode is used in un-shielded arc welding.
A. Correct

B. Incorrect
Answer: Option A
171. A process used for making thin phosphate coating on steel is called parkerising.
A. Correct
B. Incorrect
Answer: Option A
172. The recrystallisation temperature ofsteel is
A. 400° C
B. 600° C
C. 800° C
D. none of these
Answer: Option C
173. A basic hole is one whose
A. low er deviation is zero
B. upper deviation is zero
C. low er and upper deviations are zero
D. none of these
Answer: Option A
174. Seam welding is bestadopted for metal thickness ranging from
A. 0.025 to 3 mm
B. 3 to 5 mm
C. 5 to 8 mm
D. 8 to 10 mm
Answer: Option A
175. A file with 50 - 60 teeth in 25 mm is called bastard file.
A. True
B. False
Answer: Option B
176. The surface to be machined is marked on the pattern by
A. red colour
B. yellow colour

C. black colour
D. blue colour
Answer: Option A
177. In electric resistance welding,pressure applied varies from
A. 1 to 5 MPa
B. 5 to 10 MPa
C. 10 to 25 MPa
D. 25 to 55 MPa
Answer: Option D
178. In order to deliver molten metal from pouring basin to gate,a __________ is used.
A. riser
B. sprue
C. core
Answer: Option B
179. V-block is used to
A. checkthe trueness of flat surfaces
B. locate centres of round rods
C. checkthe surface roughness
D. none of these
Answer: Option D
180. A progressive limitgauge has
A. 'Go' and 'Not go' member on the same side of the gauge
B. separate 'Go' and 'Not go' members
C. 'Go' member at one end and 'Not go' member at the other end
Answer: Option A
181. Piercing is an operation of cutting
A. a cylindricalhole in a sheet of metal by the punch and the die
B. a hole (other than cylindrical) in a sheet of metal by the punch and the die
C. a flat sheet to the desired shape

D. a number of holes evenly spaced in a regular pattern on a sheet of metal
Answer: Option B
182. Shift is a casting defect which
A. results in a mismatching of the top and bottom parts of a casting
B. results in generalenlargement of a casting
C. occurs near the ingates as rough lumps on the surface of a casting
D. occurs as sand patches on the upper surface of a casting
Answer: Option A
183. During drawing operation,the states of stress in cup would include
A. compressive stressin the flange
B. tensile stress in the w all
C. both (a) and (b)
D. none of these
Answer: Option C
184. A diamond pointed chisel is used for cutting
A. flat surfaces
B. grooves
C. keyw ays
D. V-shaped grooves
Answer: Option D
185. The length of hacksaw blade is the distance between the outside edges ofthe holes which fits over the pins.
A. Agree
B. Disagree
Answer: Option A
186. The parts of circular cross-section which are symmetrical aboutthe axis of rotation are made by
A. hot forging
B. hot spinning
C. hot extrusion
D. hot draw ing
Answer: Option B
187. In permanentmould casting method

A.
molten metal is poured in a metallic mould, retained in the mould long enough for the outer skin to solidify and finally
mould is turned over to remove molten metal still in molten condition
B. molten metal is poured and allow ed to solidify w hile the mould is revolving
C. molten metal is forced into mould under high pressure
Answer: Option D
188. In electric resistance welding,pressure is applied justafter the completion ofcurrent.
A. True
B. False
Answer: Option A
189. Scribing block is used to
A. hold the round bars during marking
B. checkthe trueness of flat surfaces
C. locate the centres of round bars
D. checkthe surface roughness
Answer: Option C
190. Neutral flame is usd to weld
A. steel
B. cast iron
C. copper
D. all of these
Answer: Option D
191. Acetylene gas is stored in cylinders in
A. solid form
B. gaseous form
C. liquid form
D. any one of these
Answer: Option C
192. Which one of the following material will require the largestsize of riser for the same size ofcasting?
A. Aluminium
B. Cast iron

C. Steel
D. Copper
Answer: Option C
193. The consumable electrode is used in
A. carbon arc w elding
B. submerged arc w elding
C. TIG arc w elding
D. MIG arc w elding
Answer: Option D
194. The operation of cutting a sheetof metal in a straightline along the length, is known as
A. plunging
B. notching
C. slitting
D. forming
Answer: Option C
195. Forming is the operation of removing metal to the desired shape from the edge ofa plate.
A. Correct
B. Incorrect
Answer: Option B
196. Cold working of metal increases
A. tensile strength
B. yield strength
C. hardness
D. all of these
Answer: Option D
197. In welding aluminium with TIG arc welding,alternating currentis used.
A. Correct
B. Incorrect
Answer: Option A
198. Linde welding uses
A. neutral flame and right-w ard technique

B. oxidising flame and left-w ard technique
C. neutral flame and left-w ard technique
D. carburising flame and right-w ardtechnique
Answer: Option D
199. The purpose ofa gate is to
A. deliver molten metal into the mould cavity
B. act as a reservoir for the molten metal
C. feed the molten metal to the casting in order to compensate for the shrinkage
D. deliver molten metal from pouring basin to gate
Answer: Option A
200. When two pieces ofdifferent metals are to be welded by projection welding,then the projection should be made
on the metal piece having __________ conductivity.
A. low er
B. higher
Answer: Option B
201. The vertical welding do not require plate edge preparation upto 16 mm thickness.
A. Correct
B. Incorrect
Answer: Option A
202. The dowels are
A. w ooden nails
B. box nails
C. w ire nails
D. none of these
Answer: Option A
203. In arc welding,the temperature ofheat produced by the electric arc is of the order of
A. 3000° C to 4000°C
B. 4000° C to 5000°C
C. 5000° C to 6000°C
D. 6000° C to 7000°C
Answer: Option D
204. Extrusion

A. is extensively used for making bolts and nuts
B. is used for reducing the diameter of round bars and tubes by rotating dies w hich open and close rapidly on the w ork
C. is used to improve fatigue resistance of the metal by setting up compressive stressesin its surface
D.
consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to
provide the desired formof the finished part
Answer: Option D
205. The operation of cutting of a flat sheetto the desired shape is called
A. shearing
B. piercing
C. punching
D. blanking
Answer: Option D
206. The process ofdecreasing the cross-section ofa bar and increasing its length,is called
A. draw ing down
B. upsetting
C. spinning
D. peening
Answer: Option A
207. A casting defect which occurs due to improper venting of sand is known as
A. cold shuts
B. blow holes
C. shift
D. sw ell
Answer: Option B
208. Swab is used for
A. smoothing and cleaning out depressions in the mould
B. cleaning the moulding sand
C. moistening the sand around the edge before removing pattern
D. reinforcement of sand in the top part of the moulding box
Answer: Option C
209. The temperature ofthe inner luminous cone ofneutral flame is about

A. 1000° C
B. 1250° C
C. 2100° C
D. 3200° C
Answer: Option D
210. The metal patterns as compared to wooden patterns require less
A. shrinkage allow ance
B. machining allow ance
C. draft allow ance
D. distortion allow ance
Answer: Option C
211.
When the dimension is expressed as ,then the basic size is
A. 20 mm
B. 20.035 mm
C. 20.025 mm
D. 19.975 mm
Answer: Option A
212. In order to produce uniform packing ofsand in the moulds,a __________ is used.
A. sand slinger
B. squeezing machine
C. jolt machine
D. stripper plate machine
Answer: Option A
213. The difference between the upper limitand lower limtof a dimension is called
A. nominal size
B. basic size
C. actualsize
D. tolerance
Answer: Option D
214. Green sand is a mixture of

A. 30% sand and 70% clay
B. 50% sand and 50% clay
C. 70% sand and 30% clay
D. 90% sand and 10% clay
Answer: Option C
215. The diaphragm moulding machine is used to
A. ram the sand harder at the pattern face w ith decreasing hardnesstowardsthe backof the mould
B. ram the sand harder at the backof the mould and softer on the pattern face
C. produce uniformpacking of sand in the mould
D. give uniformsand hardness throughout the mould
Answer: Option D
216. A pattern is used to make the mould cavity for pouring the molten metal for casting.
A. Yes
B. No
Answer: Option A
217. The surface to be left unmachined is marked on the pattern by
A. red colour
B. yellow colour
C. black colour
D. blue colour
Answer: Option C
218. The two rolls in a two high rolling mills are of__________ size.
A. equal
B. different
Answer: Option A
219. The welding process used in joining mild steel shanks to high speed drills,is
A. spot w elding
B. seam w elding
C. flash butt w elding
D. upset butt w elding
Answer: Option C

220. The mode of deformation ofthe metal during spinning is
A. bending
B. stretching
C. rolling and stretching
D. bending and stretching
Answer: Option D

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