Q.1

Piercing is an operation of cutting

  • a cylindrical hole in a sheet of metal by the punch and the die
  • a hole (other than cylindrical) in a sheet of metal by the punch and the die
  • a flat sheet to the desired shape
  • a number of holes evenly spaced in a regular pattern on a sheet of metal
Q.2

In bending operation, the metal takes the shape of a punch.

  • Yes
  • No
Q.3

In welding aluminium with TIG arc welding, alternating current is used.

  • Correct
  • Incorrect
Q.4

In fore-hand welding, the angle between the welding torch and the work is __________ as compared to back-hand welding.

  • same
  • less
  • more
Q.5

The surface to be machined is marked on the pattern by

  • red colour
  • yellow colour
  • black colour
  • blue colour
Q.6

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

  • hot rolling
  • hot drawing
  • hot piercing
  • hot extrusion
Q.7

In a __________ , two or more operations are performed simultaneously at the single stroke of the ram.

  • simple die
  • progressive die
  • combination die
  • compound die
Q.8

The current in electric resistance welding can be regulated by

  • varying the input supply
  • changing the primary turns of the transformer
  • changing the secondary turns of the transformer
  • any one of the above
Q.9

During hot working of metals

  • poor surface finish is produced
  • scale is formed on the metal surface
  • close tolerances can not be maintained
  • all of these
Q.10

In permanent mould casting method

  • 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
  • molten metal is poured and allowed to solidify while the mould is revolving
  • molten metal is forced into mould under high pressure
  • none of the above
Q.11

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

  • Aluminium
  • Cast iron
  • Steel
  • Copper
Q.12

Which of the following statement is wrong?

  • The mortise gauge has two scribing pins.
  • The gouges are chisels with a hollow shaped blade.
  • An auger is a planing tool
  • all of these
Q.13

Shift is a casting defect which

  • results in a mismatching of the top and bottom parts of a casting
  • results in general enlargement of a casting
  • occurs near the ingates as rough lumps on the surface of a casting
  • occurs as sand patches on the upper surface of a casting
Q.14

The cold working of metals is carried out

  • at the recrystallisation temperature
  • below the recrystallisation temperature
  • above the recrystallisation temperature
  • at any temperature
Q.15

Lancing is the operation of

  • cutting a sheet of metal in a straight line along the length
  • removal of metal to the desired shape from the edge of a plate
  • cutting a sheet of metal through part of its length and then bending the cut portion
  • bending a sheet of metal along a curved axis
Q.16

Linde welding uses

  • neutral flame and right-ward technique
  • oxidising flame and left-ward technique
  • neutral flame and left-ward technique
  • carburising flame and right-ward technique
Q.17

A process used for making thin phosphate coating on steel is called parkerising.

  • Correct
  • Incorrect
Q.18

The advantage of thermit welding is that

  • all parts of the weld section are molten at the same time
  • weld cools almost uniformly
  • results in a minimum problem with internal residual stresses
  • all of the above
Q.19

In electric resistance welding, pressure applied varies from

  • 1 to 5 MPa
  • 5 to 10 MPa
  • 10 to 25 MPa
  • 25 to 55 MPa
Q.20

In a __________ , the molten metal is poured and allowed to solidify while the mould is revolving.

  • die casting method
  • slush casting method
  • permanent mould casting method
  • centrifugal casting method
Q.21

During cold working process

  • grain structure is distorted
  • strength and hardness of metal increases
  • close dimensional tolerance can be maintained
  • all of the above
Q.22

The minimum size of a billet iscm xcm.

  • Agree
  • Disagree
Q.23

A rip saw

  • is a two man saw
  • is used for cutting along the grains of wood
  • has a narrow blade with two wooden handles
  • all of the above
Q.24

In a cold chamber die casting machine, only non-ferrous alloys with __________ are casted.

  • low melting temperature
  • high melting temperature
Q.25

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

  • bottom part
  • middle part
  • top part
Q.26

In electric resistance welding, pressure is applied just after the completion of current.

  • True
  • False
Q.27

The consumable electrode is used in

  • carbon arc welding
  • submerged arc welding
  • TIG arc welding
  • MIG arc welding
Q.28

In a compound die

  • only one operation is performed at each stroke of the ram
  • two or more operations are performed simultaneously at the single stroke of the ram
  • two or more cutting operations are performed at one station of the press in every stroke of the ram
  • both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram
Q.29

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

  • compressive stress in the flange
  • tensile stress in the wall
  • both (a) and (b)
  • none of these
Q.30

Notching is the operation of

  • cutting a sheet of metal in a straight line along the length
  • removal of metal to the desired shape from the edge of a plate
  • cutting a sheet of metal through part of its length and then bending the cut portion
  • bending a sheet of metal along a curved axis
Q.31

The purpose of a gate is to

  • deliver molten metal into the mould cavity
  • act as a reservoir for the molten metal
  • feed the molten metal to the casting in order to compensate for the shrinkage
  • deliver molten metal from pouring basin to gate
Q.32

The recrystallisation temperature of steel is

  • 400° C
  • 600° C
  • 800° C
  • none of these
Q.33

A gimlet is a __________ tool.

  • marking
  • boring
Q.34

Slick is used for repairing and finishing the mould.

  • Correct
  • Incorrect
Q.35

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

  • riser
  • sprue
  • core
Q.36

Riddle is used for

  • smoothing and cleaning out depressions in the mould
  • cleaning the moulding sand
  • moistening the sand around the edge before removing pattern
  • reinforcement of sand in the top part of moulding box
Q.37

When filing soft metals, the file teeth are clogged with minute particles of metal. The file should be cleaned by

  • washing it with water
  • rubbing on wood
  • washing it with dilute acid
  • using file card
Q.38

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

  • straight polarity
  • reversed polarity
Q.39

The welding set up is said to have reversed polarity when the work is connected to the negative terminal and the electrode holder to the positive terminal.

  • Agree
  • Disagree
Q.40

A mortise gauge is a

  • striking tool
  • planing tool
  • boring tool
  • marking tool
Q.41

Shrinkage allowance is made by adding to external dimensions and subtracting from internal dimensions.

  • Agree
  • Disagree
Q.42

Scribing block is used to

  • hold the round bars during marking
  • check the trueness of flat surfaces
  • locate the centres of round bars
  • check the surface roughness
Q.43

The operation of cutting a sheet of metal in a straight line along the length, is known as

  • plunging
  • notching
  • slitting
  • forming
Q.44

A file removes the metal during

  • forward stroke
  • return stroke
  • both forward and return strokes
  • none of these
Q.45

A diamond pointed chisel is used for cutting

  • flat surfaces
  • grooves
  • keyways
  • V-shaped grooves
Q.46

When two pieces of different metals are to be welded by projection welding, then the projection should be made on the metal piece having __________ conductivity.

  • lower
  • higher
Q.47

A basic hole is one whose

  • lower deviation is zero
  • upper deviation is zero
  • lower and upper deviations are zero
  • none of these
Q.48

The maximum flame temperature occurs

  • at the outer cone
  • at the inner cone
  • between the outer and inner cone
  • at the torch tip
Q.49

V-block is used to

  • check the trueness of flat surfaces
  • locate centres of round rods
  • check the surface roughness
  • none of these
Q.50

A hacksaw blade cuts on the

  • forward stroke
  • return stroke
  • both forward and return strokes
  • cutting depends upon the direction of force
0 h : 0 m : 1 s