Q.1

The machining allowance provided on patterns depends upon

  • type of casting metal
  • size and shape of casting
  • method of casting used
  • all of these
Q.2

In a hot chamber die casting machine

  • ferrous alloys with low melting temperature are casted
  • ferrous alloys with high melting temperature are casted
  • non-ferrous alloys with low melting temperature are casted
  • non-ferrous alloys with high melting temperature are casted
Q.3

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

  • Correct
  • Incorrect
Q.4

In submerged arc welding, an arc is produced between a

  • carbon electrode and the work
  • metal electrode and the work
  • bare metal electrode and the work
  • two tungsten electrodes and the work
Q.5

The chisel used for cutting key ways is

  • flat chisel
  • cape chisel
  • round nose chisel
  • diamond pointed chisel
Q.6

The fullers are used

  • for finishing flat surfaces
  • for necking down a piece of work
  • for punching a hole
  • to finish the punched hole
Q.7

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

  • True
  • False
Q.8

In shielded arc welding

  • large electrode is used
  • welding rod coated with slag is used
  • welding rod coated with fluxing material is used
  • none of the above
Q.9

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

  • lower critical temperature
  • upper critical temperature
  • eutectic temperature
  • recrystallisation temperature
Q.10

The cold chisels are made by

  • drawing
  • rolling
  • piercing
  • forging
Q.11

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

  • collapsibility
  • permeability
  • cohesiveness
  • adhesiveness
Q.12

A zinc diffusion process is called

  • galvanising
  • anodising
  • parkerising
  • sherardizing
Q.13

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

  • Correct
  • Incorrect
Q.14

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

  • Yes
  • No
Q.15

Thread rolling is restricted to

  • ferrous materials
  • ductile materials
  • hard materials
  • none of these
Q.16

The centrifugal casting method, is used for casting articles of

  • symmetrical shape about vertical axis
  • symmetrical shape about horizontal axis
  • irregular shape
  • non-ferrous metal only
Q.17

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

  • feeler gauge
  • slip gauge
  • ring gauge
  • plug gauge
Q.18

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

  • press load is reduced
  • good cut edge is obtained
  • warping of sheet is minimised
  • cut blanks are straight
Q.19

The type of file used for a wood work is

  • single-cut file
  • double cut file
  • rasp-cut file
  • any one of these
Q.20

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

  • machining allowance
  • draft allowance
  • shrinkage allowance
  • distortion allowance
Q.21
The teeth of hacksaw blade are bent
  • Towards right
  • Towards left
  • Alternately towards right and left and every third or fourth left straight
  • May be bent in any direction
Q.22
A hacksaw blade cuts on the
  • Forward stroke
  • Return stroke
  • Both forward and return strokes
  • Cutting depends upon the direction of force
Q.23
A file removes the metal during
  • Forward stroke
  • Return stroke
  • Both forward and return strokes
  • None of these
Q.24
The cold chisels are made by
  • drawing
  • rolling
  • piercing
  • forging
Q.25
A hacksaw blade is specified by its
  • Length
  • Material
  • Width
  • Number of teeth
Q.26
The cutting edge of a chisel should be
  • Hardened
  • Tempered
  • Hardened and tempered
  • Case hardened
Q.27
Metal patterns are used for
  • small castings
  • large castings
  • complicated castings
  • large scale production of castings
Q.28
Cores are used to
  • Form internal cavities in the casting
  • Improve mould surface
  • Form a part of a green sand mould
  • All of these
Q.29
The acetylene cylinder is usually painted with
  • Black colour
  • White colour
  • Maroon colour
  • Yellow colour
Q.30
The temperature at which the new grains are formed in the metal is called
  • lower critical temperature
  • upper critical temperature
  • eutectic temperature
  • recrystallisation temperature
Q.31
The chisel used for cutting key ways is
  • flat chisel
  • cape chisel
  • round nose chisel
  • diamond pointed chisel
Q.32
In a hot chamber die casting machine
  • ferrous alloys with low melting temperature are casted
  • ferrous alloys with high melting temperature are casted
  • non-ferrous alloys with low melting temperature are casted
  • non-ferrous alloys with high melting temperature are casted
Q.33
A moving mandrel is used in
  • Wire drawing
  • Tube drawing
  • Metal cutting
  • Forging
Q.34
The electrodes used in spot welding have a tip of
  • stainless steel
  • aluminium
  • copper
  • brass
Q.35
In a centrifugal casting method
  • Core is made of sand
  • Core is made of ferrous metal
  • Core is made of nonferrous metal
  • No core is used
Q.36
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.37
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.38
In shielded arc welding
  • large electrode is used
  • welding rod coated with slag is used
  • welding rod coated with fluxing material is used
  • none of the above
Q.39
The consumable electrode is used in
  • Carbon arc welding
  • Submerged arc welding
  • TIG arc welding
  • MIG arc welding
Q.40
The oxygen cylinder is usually painted with
  • Black colour
  • White colour
  • Maroon colour
  • Yellow colour
Q.41
A casting defect which occurs due to improper venting of sand is known as
  • Cold shuts
  • Blow holes
  • Shift
  • Swell
Q.42
The purpose of a riser 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 the molten metal from pouring basin to gate
Q.43
Thread rolling is restricted to
  • Ferrous materials
  • Ductile materials
  • Hard materials
  • None of these
Q.44
The property of sand due to which it evolves a great amount of steam and other gases is called
  • collapsibility
  • permeability
  • cohesiveness
  • adhesiveness
Q.45
A zinc diffusion process is called
  • galvanising
  • anodising
  • parkerising
  • sherardizing
Q.46
Thermit welding is often used in
  • Replacing broken gear teeth
  • Repairing broken shears
  • Joining rails, truck frames and locomotive frames etc.
  • All of the above
Q.47
The machining allowance provided on patterns depends upon
  • type of casting metal
  • size and shape of casting
  • method of casting used
  • all of these
Q.48
Which of the following methods can be used for manufacturing 2 metre long seamless metallic tubes?
  • Drawing
  • Extrusion
  • Rolling
  • Extrusion and rolling
Q.49
The draft or taper allowance on casting is generally
  • 1 to 2 mm/m
  • 2 to 5 mm/m
  • 5 to 10 mm/m
  • 10 to 15 mm/m
Q.50
The electron beam welding can be carried out in
  • Open air
  • A shielded gas environment
  • Vacuum
  • A pressurized inert gas chamber
0 h : 0 m : 1 s