Bangladesh Rural Electrification Board (BREB)
Post: Assistant Engineer (Mechanical)
22) Carbide tipped tools usually have
a) Negative rank angle
b) Positive rank angle
c) Any rake angle
d) No rake angle
23) The type of tool used on lathe,
shaper and planer is -
a) Single point cutting tool
b) Two point cutting tool
c) Three point cutting tool
d) Multi point cutting tool
24) The process extensively used for
making bolts and nuts is
a) Hot piercing
b) Extrusion
c) Cold peering
d) Cold heading
25) Cold working of metal increases
a) Tensile strength
b) Yield strength
c) Hardness
d) All of above
26) Ball bearings are, usually made
from
a) Low carbon steel
b) High Carbon steel
c) High speed steel
d) All of the above
27) Cast Iron has
a) High compressive strength
b) Good wear resistance
c) Excellent machinability
28) The Property of a material which
enables it to retain the deformation permeability is called
a) Brittleness
b) Ductility
c) Plasticity
d) Malleability
29) The size of gear is usually
specified by
a) Pressure angle
b) Pitch Circle diameter
c) Circular Pitch
d) Tooth thickness
30) A spring is used to
a) Measure forces
b) Apply forces
c) Store energy
d) All of the above
31) An universal coupling is used to
connect two shafts
a) Which are perfectly aligned
b) Which are not in exact alignment
c) Have lateral misalignment
d) Whose axes intersect at a small
angle
32) The material generally used for
air-craft components is
a) Mild steel
b) High Speed steel
c) Stainless Steel
d) Aluminum
33 ) The property of a material which enable
it to be drawn into the wire with the application of a tensile force, is called
a) Plasticity
b) Elasticity
c) Ductility
d) Malleability
34) The power from the engine to the
rear axle of an automobile is transmitted by
a) Worm and worm wheel
b) Super gears
c) Bevel gears
d) Hook’s
joint
35) In Mechanical refrigeration
system, the refrigerant has the maximum temperature
a) In evaporator
b) Before expansion valve
c) Between compressor and condenser
d) Between condenser and evaporator
36) The amount of radiation mainly
depends upon the
a) Nature of the body
b) Temperature of the body
c) Type of surface of the body
d) All of the above
37) Fourier’s
law of heat conduction gives the heat flow for
a)Irregular surface
b) Non-uniform temperature surface
c) One dimensional cases only
d) Two dimensional cases only
38) The process of heat transfer from
one particle of the body to another is called conduction, when the particles of
the body
a) Move actually
b) Do not move actually
c) Affect the intervening medium
d) Does not affect the intervening
medium
39) A carburetor is used to supply
a) Petrol, air and lubricating oil
b) Air and Petrol
c) Petrol and lubricating oil
d) Petrol and air
40) If petrol is used in diesel
engine, then
a) Low power will be produced
b) Efficiency will be low
c) Higher knocking will occur
d) Black smoke will be produced
41) Parson’s
turbine is a
a) Simple impulse turbine
b) Simple reaction turbine
c) Impulse reaction turbine
d) None of the above
42) The action of steam in a steam
turbine is
a) Static
b) Dynamic
c) Static and dynamic
d) Neither static neither dynamic
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