1) Duralumin is an alloy of
Aluminum and mercury
Aluminum and iron
Aluminum and Copper
Aluminum and Carbon
Correct answer
Aluminum and Copper
2) Which of the following alloy is used in making aircraft structures?
Duralumin
Brass
Bronze
Manganin
Correct answer
Duralumin
3) Which of the following method is adopted for preventing corrosion by acids?
Deaeration
Removal by using ion-exchange resin
Dehumidification
Neutralization with lime
Correct answer
Neutralization with lime
4) Which of the following method is adopted for preventing corrosion by moisture?
Dehumidification
Deaeration
Removal by using ion-exchange resin
Neutralization with lime
Correct answer
Dehumidification
5) The process which lowers the content of sulphur and phosphorus in steels is known as
Inhibition
Refining
Passivation
Stimulation
Correct answer
Refining
6) Annealing is a heat treatment given to metals to
Form a protective layer
Remove the residual stresses
Prevent dezincification
Lower the sulphur content
Correct answer
Remove the residual stresses
7) Magnesium is used in high resistivity electrolytes due to its
Neutral potential
Most negative potential
Most positive potential
Zero potential
Correct answer
Most negative potential
8) Crowning of a pulley is done to
a) Prevent the slipping of a belt
b) To increase the tension of a belt
c) To increase the angle of contact
d) None of these
Correct answer
a) Prevent the slipping of a belt
9) In which of the following drives, there is no slip
Chain drive
Open belt drive
Rope drive
Crossed belt drive
Correct answer
Chain drive
10) The angle of contact (Ɵ) for crossed belt drive is given by
180 + α
180 - 2α
180 + 2α
180 - α
Correct answer
180 + 2α
11) The power transmitted by a belt drive is given by
12) The economy in material handling can be achieved by
a) Employing gravity feed movements
b) Minimizing the distance of travel
c) By carrying material to destination without using manual labour
d) All of these
Correct answer
d) All of these
13) The principle of ‘Unit load’ states that
a) Materials should be moved in lots
b) One unit should be moved at a time
c) Both (a) & (b)
d) None of these
Correct answer
a) Materials should be moved in lots
14) The forklift truck is used for
a) Lifting and lowering
b) Vertical transportation
c) Both (a) & (b)
d) None of these
Correct answer
c) Both (a) & (b)
15) Rag bolt is a type of:
Locking Bolt
Heavy duty bolt
Welding bolt
Foundation bolt
Correct answer
Foundation bolt
16) Lubricating oil
a) Minimizes wear in moving parts
b) Helps in keeping the parts cool
c) Washes away and carries away dirt
d) All of these
Correct answer
d) All of these
17) In the following system, lubricating oil is carried in separate tanks from where it is fed to the engine
Mist lubrication system
Dry sump system
Splash system
Wet sump system
Correct answer
Dry sump system
18) ………………… is the ability of the oil to resist internal deformation due to mechanical stresses.
a) Viscosity
b) Flashpoint
c) Fire point
d) None of these
Correct answer
a) Viscosity
19) Which gear arrangement is used to change the circular motion of horizontal to vertical without the change in speed ratio?
Two bevel gear
Two spur gear
Worm and worm gear
Two helical gear
Correct answer
Two bevel gear
20) A systematic approach for maintenance is
Problem— Diagnosis — Cause — Rectification
Problem — Measure — Diagnosis - Rectification
Problem— Diagnosis — Measure — Rectification
Problem — Cause — Diagnosis — Rectification
Correct answer
Problem — Cause — Diagnosis — Rectification
21) A gear wheel has 36 teeth and 3 mm module, its pitch diameter is?
12 mm
75 mm
80 mm
108 mm
Correct answer
108 mm
22) What will be the result if the clearance angle in the drill is increased?
Rough hole surface
Weak cutting edge
Increased point angle
Poor wedging action
Correct answer
Weak cutting edge
23) The main purpose of using worm and worm wheel drives in machines and their accessories is to?
Provide large speed reduction from worm shaft to worm wheel
Provide large speed reduction from worm wheel to the worm shaft
Transmit large torque
Transmit higher speeds
Correct answer
Provide large speed reduction from worm shaft to worm wheel
24) The tooth thickness of the rack is measured by?
Gear tester
Flange micrometer
Universal vernier caliper
Gear tooth vernier caliper
Correct answer
Gear tooth vernier caliper
25) Which one of the following groups of properties enables the manufacture of chain hooks from wrought iron?
Hardness, toughness, and brittleness
Hardness, toughness, and ductility
Ductility, malleability, and hardness
Malleability, ductility, and toughness
Correct answer
Malleability, ductility, and toughness
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