Workshop Technology MCQ Questions & Answers

Question 1

A pattern maker's shrinkage rule considers

A. all pattern allowances
B. only shrinkage allowance
C. all materials to be cast
D. all materials of the pattern

Question 2

A plug gauge is used to check the diameter of shafts and studs.

A. Correct
B. Incorrect

Question 3

A saw which cuts wood during the return stroke of the saw is known as

A. push saw
B. pull saw or draw saw

Question 4

A taper provided on the pattern for its easy and clean withdrawl from the mould is known as

A. machining allowance
B. draft allowance
C. shrinkage allowance
D. distortion allowance

Question 5

A zinc diffusion process is called

A. galvanising
B. anodising
C. parkerising
D. sherardizing

Question 6

Blanking and piercing operations can be performed simultaneously in a

A. simple die
B. progressive die
C. compound die
D. combination die

Question 7

Galvanising is a

A. zinc diffusion process
B. process of coating zinc by hot dipping
C. process used for making thin phosphate coating on steel
D. none of the above

Question 8

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

Question 9

In a bilateral system of tolerance, the tolerance is allowed on

A. one side of the actual size
B. one side of the nominal size
C. both sides of the actual size
D. both sides of the nominal size

Question 10

In a centrifugal casting method

A. core is made of sand
B. core is made of ferrous metal
C. core is made of non-ferrous metal
D. no core is used

Question 11

In a centrifugal casting method, the impurities are collected in the centre of the casting.

A. Yes
B. No

Question 12

In a die casting method, the molten metal is forced into mould under high pressure.

A. Correct
B. Incorrect

Question 13

In a four high rolling mill, there are four rolls out of 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

Question 14

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

Question 15

In a hot chamber die casting machine

A. melting pot is separate from the machine
B. melting pot is an integral part of the machine
C. melting pot may have any location
D. high temperature and pressure is used

Question 16

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

Question 17

In average work, the tolerance produced by investment casting method is

A. ±0.05 mm
B. +0.2 mm
C. +05 mm
D. +1 mm

Question 18

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°

Question 19

In sheet metal blanking, shear is provided on punches and dies so that

A. press load is reduced
B. good cut edge is obtained
C. warping of sheet is minimised
D. cut blanks are straight

Question 20

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

Question 21

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

Question 22

In welding copper alloys with TIG arc welding

A. direct current with straight polarity is used
B. direct current with reversed polarity is used
C. alternating current is used
D. any one of these

Question 23

Metal patterns are used for

A. small castings
B. large castings
C. complicated castings
D. large scale production of castings

Question 24

Surface plate is used to check the trueness of flat surfaces.

A. TRUE
B. FALSE

Question 25

The accuracy of micrometers, calipers, dial indicators can be checked by a

A. feeler gauge
B. slip gauge
C. ring gauge
D. plug gauge

Question 26

The algebraic difference between the minimum limit and the basic size is called

A. actual deviation
B. upper deviation
C. lower deviation
D. fundamental deviation

Question 27

The blank diameter used in thread rolling will be

A. equal to minor diameter of the thread
B. equal to pitch diameter of the thread
C. a little larger than the minor diameter of the thread
D. a little larger than the pitch diameter of the thread

Question 28

The bloom is smaller than a billet.

A. TRUE
B. FALSE

Question 29

The centrifugal casting method, is used for casting articles of

A. symmetrical shape about vertical axis
B. symmetrical shape about horizontal axis
C. irregular shape
D. non-ferrous metal only

Question 30

The chisel used for cutting key ways is

A. flat chisel
B. cape chisel
C. round nose chisel
D. diamond pointed chisel

Question 31

The cold chisels are made by

A. drawing
B. rolling
C. piercing
D. forging

Question 32

The cross-section of a chisel is usually

A. rectangular
B. square
C. hexagonal
D. octagonal

Question 33

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

Question 34

The electrodes used in spot welding have a tip of

A. stainless steel
B. aluminium
C. copper
D. brass

Question 35

The ferrous metals require more machining allowance than non-ferrous metals.

A. TRUE
B. FALSE

Question 36

The fullers are used

A. for finishing flat surfaces
B. for necking down a piece of work
C. for punching a hole
D. to finish the punched hole

Question 37

The instrument which 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

Question 38

The low pressure acetylene is produced at the welding site by the chemical reaction between water and calcium carbonate.

A. Correct
B. Incorrect

Question 39

The machining allowance provided on patterns depends upon

A. type of casting metal
B. size and shape of casting
C. method of casting used
D. all of these

Question 40

The property of sand due to which it evolves a great amount of steam and other gases is called

A. collapsibility
B. permeability
C. cohesiveness
D. adhesiveness

Question 41

The purpose of a 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

Question 42

The temperature at which the new grains are formed in the metal is called

A. lower critical temperature
B. upper critical temperature
C. eutectic temperature
D. recrystallisation temperature

Question 43

The temperature of oxy-hydrogen flame is __________ oxy-acetylene flame.

A. same as
B. less than
C. more than

Question 44

The tolerance produced by shell moulding process of casting is

A. +0.05 mm
B. ±0.2 mm
C. +0.5 mm
D. ±1 mm

Question 45

The type of file used for a wood work is

A. single-cut file
B. double cut file
C. rasp-cut file
D. any one of these

Question 46

Thread rolling is restricted to

A. ferrous materials
B. ductile materials
C. hard materials
D. none of these

Question 47

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

Question 48

When a pattern is made in three parts, the bottom part is known as a cope.

A. TRUE
B. FALSE

Question 49

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

Question 50

Which of the following welding process uses non-consumable electrodes?

A. TIG welding
B. MIG welding
C. Manual arc welding
D. Submerged arc welding

Question 51

The brass and bronze are welded by _________ flame.

A. Neutral
B. Oxidizing
C. Carburising
D. All of these

Question 52

A gimlet is a ________ tool.

A. Boring
B. Marking
C. Cutting
D. None of these

Question 53

In TIG arc welding, the welding zone is shielded by an atmosphere of

A. Helium gas
B. Argon gas
C. Either (A) or (B)
D. None of these

Question 54

In sheet metal blanking, shear is provided on punches and dies so that

A. Press load is reduced
B. Good cut edge is obtained
C. Warping of sheet is minimized
D. Cut blanks is straight

Question 55

For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately

A. 42 mm
B. 44 mm
C. 46 mm
D. 48 mm

Question 56

The cutting edge of a chisel should be

A. Hardened
B. Tempered
C. Hardened and tempered
D. Case hardened

Question 57

For gas welding, the pressure desired at the 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

Question 58

A ring gauge is used to

A. Check the diameter of shafts or studs
B. Test the accuracy of holes
C. Check the clearance between two mating surfaces
D. All of the above

Question 59

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

Question 60

Thermit welding is often used in

A. Replacing broken gear teeth
B. Repairing broken shears
C. Joining rails, truck frames and locomotive frames etc.
D. All of the above

Question 61

When a pattern is made in three parts, the ________ is known as a drag.

A. Bottom part
B. Middle part
C. Top part
D. None of these

Question 62

Which of the following material can be used for making patterns?

A. Aluminium
B. Wax
C. Lead
D. All of these

Question 63

Which of the following welding method uses a pool of molten metal?

A. Carbon arc welding
B. Submerged arc welding
C. TIG arc welding
D. MIG arc welding

Question 64

A casting defect which occurs due to improper venting of sand is known as

A. Cold shuts
B. Blow holes
C. Shift
D. Swell

Question 65

Which one of the following material will require the largest size of riser for the same size of casting?

A. Aluminium
B. Cast iron
C. Steel
D. Copper

Question 66

A hacksaw blade is specified by its

A. Length
B. Material
C. Width
D. Number of teeth

Question 67

The welding process used in joining mild steel shanks to high speed drills, is

A. Spot welding
B. Seam welding
C. Flash butt welding
D. Upset butt welding

Question 68

For cutting brass, the hacksaw blade should have ________ teeth per 25 mm.

A. 14
B. 24
C. 32
D. 40

Question 69

A file removes the metal during

A. Forward stroke
B. Return stroke
C. Both forward and return strokes
D. None of these

Question 70

Lancing is the operation of

A. Cutting a sheet of metal in a straight line along the length
B. Removal of metal to the desired shape from the edge of a plate
C. Cutting a sheet of metal through part of its length and then bending the cut portion
D. Bending a sheet of metal along a curved axis

Question 71

Notching is the operation of

A. Cutting a sheet of metal in a straight line along the length
B. Removal of metal to the desired shape from the edge of a plate
C. Cutting a sheet of metal through part of its length and then bending the cut portion
D. Bending a sheet of metal along a curved axis

Question 72

When the dimension is expressed as $$20_{ - 0.025}^{ + 0.035}$$, then the tolerance is

A. 0.035 mm
B. 0.025 mm
C. 0.01 mm
D. 0.06 mm

Question 73

In forehand welding, the weld is made

A. From left to right
B. From right to left
C. First from left to right and then from right to left
D. Either from left to right or from right to left

Question 74

A diamond pointed chisel is used for cutting

A. Flat surfaces
B. Grooves
C. Key-ways
D. V-shaped grooves

Question 75

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

Question 76

Thermit, used in Thermit welding, is a mixture of

A. Charcoal and iron oxide
B. Charcoal and aluminium
C. Iron oxide and aluminium
D. Charcoal, iron oxide and aluminium

Question 77

For smoothing and cleaning out depressions in the mould, a ________ is used.

A. Slick
B. Lifter
C. Swab
D. Gagger

Question 78

In order to produce uniform packing of sand in the moulds, a _________ is used.

A. Sand slinger
B. Squeezing machine
C. Jolt machine
D. Stripper plate machine

Question 79

In order to ram the sand harder at the back of the mould and softer on the pattern face, a ________ is used.

A. Sand slinger
B. Squeezing machine
C. Jolt machine
D. Stripper plate machine

Question 80

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

Question 81

In order to deliver molten metal from pouring basin to gate, a ________ is used.

A. Riser
B. Sprue
C. Core
D. None of these

Question 82

In welding magnesium with TIG arc welding, direct current with ________ is used.

A. Straight polarity
B. Reversed polarity
C. Both (A) and (B)
D. None of these

Question 83

For welding plates of thickness more than 12.5 mm, its edges

A. Do not require bevelling
B. Should be bevelled to a single-V or U-groove
C. Should have a double-V or U-groove on one side
D. Should have a double-V or U-groove on both sides

Question 84

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

Question 85

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 throughout the mould
D. Produce uniform packing of sand in the mould

Question 86

The diaphragm moulding 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 packing of sand in the mould
D. Give uniform sand hardness throughout the mould

Question 87

In a centrifugal casting method

A. Core is made of sand
B. Core is made of ferrous metal
C. Core is made of nonferrous metal
D. No core is used

Question 88

The temperature of the inner luminous cone of neutral flame is about

A. 1000°C
B. 1250°C
C. 2100°C
D. 3200°C

Question 89

The acetylene cylinder is usually painted with

A. Black colour
B. White colour
C. Maroon colour
D. Yellow colour

Question 90

The oxygen cylinder is usually painted with

A. Black colour
B. White colour
C. Maroon colour
D. Yellow colour

Question 91

The operation of cutting a cylindrical hole in a sheet of metal by the punch and die is called

A. Shearing
B. Piercing
C. Punching
D. Blanking

Question 92

A moving mandrel is used in

A. Wire drawing
B. Tube drawing
C. Metal cutting
D. Forging

Question 93

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

Question 94

Which of the following statement is wrong?

A. The hot chamber die casting machine is used for casting zinc, tin, lead and other low melting alloys.
B. The cold chamber die casting machine is used for casting aluminium, magnesium, copper base alloys and other high melting alloys.
C. The castings produced by centrifugal casting method have open and coarse grained structure.
D. All of the above

Question 95

Which of the following statement is wrong?

A. The angular clearance on dies varies from 0.5° to 1°
B. In drawing operation, the metal flows due to plasticity
C. In press operation, the size of the pierced hole is independent of the size of punch
D. None of the above

Question 96

Which of the following statement is 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

Question 97

The parts of circular cross-section which are symmetrical about the axis of rotation are made by

A. Hot forging
B. Hot spinning
C. Hot extrusion
D. Hot drawing

Question 98

The recrystallisation temperature of steel is

A. 400°C
B. 600°C
C. 800°C
D. None of these

Question 99

The teeth of hacksaw blade are bent

A. Towards right
B. Towards left
C. Alternately towards right and left and every third or fourth left straight
D. May be bent in any direction

Question 100

The operation of bending a sheet of metal along a curved axis, is known as

A. Plunging
B. Notching
C. Slitting
D. Forming

Question 101

In forehand welding, the angle between the welding torch and the work is ________ as compared to backhand welding.

A. Same
B. Less
C. More
D. None of these

Question 102

The electron beam welding can be carried out in

A. Open air
B. A shielded gas environment
C. Vacuum
D. A pressurized inert gas chamber

Question 103

Structural sections such as rails, angles, I-beams are made by

A. Hot rolling
B. Hot drawing
C. Hot piercing
D. Hot extrusion

Question 104

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

Question 105

V-block is used to

A. Check the trueness of flat surfaces
B. Locate centres of round rods
C. Check the surface roughness
D. None of these

Question 106

In sheet metal work, he cutting force on the tool can be reduced by

A. Grinding the cutting edges sharp
B. Increasing the hardness of tool
C. Providing shear on tool
D. Increasing the hardness of die

Question 107

The edge of a steel plate cut by oxygen cutting will get hardened when the carbon content is

A. Less than 0.1 percent
B. Less than 0.3 percent
C. More than 0.3 percent
D. Anywhere between 0.1 to 1 percent

Question 108

In blanking operation, the clearance is provided on

A. Punch
B. Die
C. Half on the punch and half on the die
D. Either on punch or die depending upon designer's choice

Question 109

In piercing operation, the clearance is provided on

A. Punch
B. Die
C. Half on the punch and half on the die
D. Either on punch or die depending upon designer's choice

Question 110

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

Question 111

The welding process used to join the ends of two pipes of uniform cross-section, is

A. Spot welding
B. Seam welding
C. Projection welding
D. Upset butt welding

Question 112

The consumable electrode is used in

A. Carbon arc welding
B. Submerged arc welding
C. TIG arc welding
D. MIG arc welding

Question 113

During drawing operation, the states of stress in cup would include

A. Compressive stress in the flange
B. Tensile stress in the wall
C. Both (A) and (B)
D. None of these

Question 114

Acetylene gas is stored in cylinders in

A. Solid form
B. Gaseous form
C. Liquid form
D. Any one of these

Question 115

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

Question 116

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

Question 117

The operation of cutting of a flat sheet to the desired shape is called

A. Shearing
B. Piercing
C. Punching
D. Blanking

Question 118

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

Question 119

Most of the oxyacetylene welding is done with

A. Neutral flame
B. Oxidizing flame
C. Carburising flame
D. All of these

Question 120

The width of slot cut by a hacksaw blade is _______ the width of the blade.

A. Equal to
B. Less than
C. Greater than
D. None of these

Question 121

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. Nonferrous alloys with low melting temperature are casted
D. Nonferrous alloys with high melting temperature are casted

Question 122

In a cold chamber die casting machine

A. Melting pot is separate from the 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

Question 123

Carburising flame is used to weld

A. Steel, cast iron, copper, aluminium etc
B. Brass and bronze
C. Hard surfacing materials such as stellite
D. All of these

Question 124

A progressive limit gauge 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
D. None of the above

Question 125

The purpose of a gate is to

A. Delivers 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. Delivers molten metal from pouring basin to gate

Question 126

In order to check the clearance between two mating surfaces, a ________ gauge should be used.

A. Ring
B. Plug
C. Feeler
D. None of these

Question 127

In forehand 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°

Question 128

In backhand 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°

Question 129

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

Question 130

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

Question 131

The cold chisels are made from

A. Cast iron
B. Mild steel
C. High speed steel
D. Cast tool steel

Question 132

A three high rolling mill consists of three rolls placed one above the other. Which of the following statement is correct?

A. The upper and middle rolls rotate in the same direction whereas the bottom roll rotates in opposite direction
B. The upper and bottom rolls rotate in the same direction whereas the middle roll rotates in opposite direction
C. The bottom and middle roll rotate in the same direction
D. Any one of the above

Question 133

The maximum flame temperature occurs

A. At the outer cone
B. At the inner cone
C. Between the outer and inner cone
D. At the torch tip

Question 134

The temperature produced by oxy-hydrogen flame is about

A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C

Question 135

The instrument used to measure external and internal diameter of shafts, thickness of parts and depth of holes, is

A. Outside micrometer
B. Inside micrometer
C. Depth gauge micrometer
D. Vernier caliper

Question 136

According to Indian standards, the total numbers of tolerance grades are

A. 8
B. 12
C. 18
D. 20

Question 137

The metal patterns as compared to wooden patterns require less

A. Shrinkage allowance
B. Machining allowance
C. Draft allowance
D. Distortion allowance

Question 138

The casting method adopted for ornaments and toys of nonferrous alloys, is

A. Permanent mould casting
B. Slush casting
C. Die casting
D. Centrifugal casting

Question 139

The oxyacetylene gas used in gas welding produce a flame temperature of

A. 1800°C
B. 2100°C
C. 2400°C
D. 3200°C

Question 140

In order to get uniform thickness of the plate by rolling process, one provides

A. Camber on the rolls
B. Offset on the rolls
C. Hardening of the rolls
D. Antifriction bearings

Question 141

The operation of straightening a curved sheet metal, is known as

A. Drawing
B. Squeezing
C. Coining
D. Planishing

Question 142

The operation of producing cup shaped parts from flat sheet metal blanks by bending and plastic flow of metal, is known as

A. Drawing
B. Squeezing
C. Coining
D. Planishing

Question 143

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 which open and close rapidly on the work
C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in 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 form of the finished part

Question 144

Cold working of metal increases

A. Tensile strength
B. Yield strength
C. Hardness
D. All of these

Question 145

The process used to improve fatigue resistance of the metal by setting up compressive stresses in its surface, is known as

A. Hot piercing
B. Extrusion
C. Cold peening
D. Cold heading

Question 146

For arc welding

A. Alternating current with high frequency is used
B. Alternating current with low frequency is used
C. Direct current is used
D. Any one of these

Question 147

In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.

A. Same
B. Less
C. More
D. None of these

Question 148

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 two surfaces of metal under pressure after heating
D. Bending of a bar

Question 149

According to Indian standard specifications, 100 H6/g5 means that.

A. Basic size is 100 mm
B. Actual size is 100 mm
C. Difference between the actual size and basic size is 100 mm
D. None of the above

Question 150

A basic shaft is one whose

A. Lower deviation is zero
B. Upper deviation is zero
C. Lower and upper deviations are zero
D. None of these

Question 151

A basic hole is one whose

A. Lower deviation is zero
B. Upper deviation is zero
C. Lower and upper deviations are zero
D. None of these

Question 152

In spot welding, the distance between the nearest edge of the plate and centre of weld should be equal to

A. d
B. 1.5 d
C. 3d
D. 6d

Question 153

The welding set up is said to have straight polarity, when

A. Work is connected to the positive terminal and the electrode holder to the negative terminal
B. Work is connected to the negative terminal and the electrode holder to the positive terminal
C. Work is connected to the positive terminal and the electrode holder is earthed
D. Work is connected to the negative terminal and the electrode holder is earthed

Question 154

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

Question 155

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

Question 156

In a compound die

A. Only one operation is performed at each stroke of the ram
B. Two or more operations are performed simultaneously at the single stroke of the ram
C. Two or more cutting operations are performed at one station of the press in every stroke of the ram
D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

Question 157

In a simple die

A. Two or more operations are performed simultaneously at the single stroke of the ram
B. Two or more cutting operations are performed at one station of the press in every stroke of the ram
C. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
D. None of the above

Question 158

Linde welding uses

A. Neutral flame and rightward technique
B. Oxidizing flame and leftward technique
C. Neutral flame and leftward technique
D. Carburising flame and rightward technique

Question 159

A neutral flame is obtained by supplying

A. Equal volumes of oxygen and acetylene
B. More volume of oxygen and less volume of acetylene
C. More volume of acetylene and less volume of oxygen
D. None of the above

Question 160

The minimum size of a bloom is

A. 5 cm × 5 cm
B. 10 cm × 10 cm
C. 15 cm × 15 cm
D. 20 cm × 20 cm

Question 161

When the file is moved to and fro over the work, it is known as

A. Cross filing
B. Draw filing
C. Pull and push filing
D. None of these

Question 162

The binder commonly used in making oil sand, is

A. Clay type binder
B. Organic type binder
C. Inorganic type binder
D. Any one of these

Question 163

When more volume of acetylene and less volume of oxygen is supplied, then a ________ flame is obtained.

A. Neutral
B. Oxidizing
C. Carburising
D. None of these

Question 164

In permanent mould 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 allowed to solidify while the mould is revolving
C. Molten metal is forced into mould under high pressure
D. None of the above

Question 165

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

Question 166

The process of decreasing the cross-section of a bar and increasing its length, is called

A. Drawing down
B. Upsetting
C. Spinning
D. Peening

Question 167

The process of increasing the cross-section of a bar at the expense of its length, is called

A. Drawing down
B. Upsetting
C. Spinning
D. Peening

Question 168

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

Question 169

The hot 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

Question 170

In a gas welding of mild steel using an oxyacetylene flame, the total amount of acetylene consumed is 10 litres. The oxygen consumption from the cylinder is

A. 5 litres
B. 10 litres
C. 15 litres
D. 20 litres