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Free download in PDF Brakes Objective Type Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams. These short solved questions or quizzes are provided by Gkseries.
(21)
An internal expanding shoe brake is mainly used in
[A]
Hoist
[B]
Conveyor
[C]
Vehicle
[D]
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
(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
(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
(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
(28)
In block brake with long shoe, the semi-block angle is
[A]
θ
[B]
θ/2
[C]
2θ
[D]
None of the above
(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
(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°
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
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
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
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
35
Internal and External expanding shoe brakes are
[A]
Axial brakes
[B]
Radial brakes
[C]
Both (A) and (B)
[D]
None of the above
36
Mechanical brakes are operated by
[A]
Pedals
[B]
Springs
[C]
Levers
[D]
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
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
39
The energy absorbed by the brake is
[A]
Potential energy
[B]
Kinetic energy
[C]
both (A) and (B)
[D]
None of the above
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
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