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Brakes Quiz | Brakes Objective Type Questions and Answers

Questions
21 An internal expanding shoe brake is mainly used in
A Hoist
B Conveyor
C Vehicle
D All of the above

Answer: All of the above
22 In internal expanding shoe brake, the actuating force is usually provided by means of
A A hydraulic cylinder
B A cam mechanism
C both (A) and (B)
D None of the above

Answer: both (A) and (B)
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23 Pivoted shoe brakes are mainly used in
A Hoists and Cranes
B Railway trains
C Automobiles
D All of the above

Answer: Hoists and Cranes
24 In brakes, the wear occurs on the
A Brake drum
B Friction lining
C Both (A) and (B)
D None of the above

Answer: Friction lining
25 In case of the pivoted shoe brake, the location of the pivot can be selected in such a way that the moment of frictional force about the pivot is
A Zero
B Minimum
C Maximum
D One

Answer: Zero
26 In block brakes with long shoe, equivalent coefficient of friction is given by
A µ[(4sinθ)/(2θ+sinθ)]
B µ[(2sinθ)/(2θ+sin2θ)]
C µ[(4sinθ)/(θ+sin2θ)]
D µ[(4sinθ)/(2θ+sin2θ)]

Answer: µ[(4sinθ)/(2θ+sin2θ)]
27 The brake drum is made of
A Aluminium
B Steel
C Cast iron
D All of the above

Answer: All of the above
28 In block brake with long shoe, the semi-block angle is
A θ
B θ/2
C 2θ
D None of the above

Answer: θ
29 For anticlockwise rotation of brake drum in block brake, the actuating force or braking effort is ___ that of clockwise direction.
A More than
B Less than
C Equal to
D Any of the above

Answer: More than
30 When the intensity of pressure between the block and brake drum is uniform, the angle of contact between the block and brake drum is less than
A 45°
B 90°
C 60°
D 30°

Answer: 45°
31 Which type of brake is commonly employed in railway trains?
A Block brake
B Internal expanding brake
C Band brake
D Any of the above

Answer: Block brake
32 The braking torque depends upon
A Final velocity of the system
B Initial velocity of the system
C The mass of the system
D All of the above

Answer: All of the above
33 Brake capacity depends upon
A The coefficient of friction
B The contacting area of braking surface
C The unit pressure between braking surfaces
D All of the above

Answer: All of the above
34 Which of the following is (are) an electrical brake?
A Eddy current brake
B Hysteresis brake
C Magnetic particle brake
D All of the above

Answer: All of the above
35 Internal and External expanding shoe brakes are
A Axial brakes
B Radial brakes
C Both (A) and (B)
D None of the above

Answer: Radial brakes
36 Mechanical brakes are operated by
A Pedals
B Springs
C Levers
D Any of the above

Answer: Any of the above
37 The energy absorbed by the brake is converted into
A Mechanical energy
B Electrical energy
C Heat energy
D Kinetic energy

Answer: Heat energy
38 In hoists and elevators, the brake absorbs the
A Kinetic energy
B Potential energy
C Both (A) and (B)
D None of the above

Answer: Kinetic energy
39 The energy absorbed by the brake is
A Potential energy
B Kinetic energy
C both (A) and (B)
D None of the above

Answer: both (A) and (B)
40 Brake is used to ____ the energy possessed by a moving system or mechanism by means of friction.
A Release
B Minimize
C Maximize
D Absorb

Answer: Absorb

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