1) If brakes are applied on front wheels of a car and if it moves on a level road, then retardation of the car is calculated using the formula
a. μ g
b. [μ g (l-x)] / (l + μ h)
c. (μ g x) / (l- μ h)
d. none of the above
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Answer
Explanation
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ANSWER: (μ g x) / (l- μ h)
Explanation:
No explanation is available for this question!
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2) Double block brake is a type of
a. Band brake
b. Internal expanding shoe brake
c. Shoe brake
d. None of the above
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Answer
Explanation
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ANSWER: Shoe brake
Explanation:
No explanation is available for this question!
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3) Which energy is absorbed by the brakes of an elevator during braking process?
a. Potential energy
b. Kinetic energy
c. Both a. and b.
d. None of the above
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Answer
Explanation
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ANSWER: Potential energy
Explanation:
No explanation is available for this question!
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4) In single shoe brake, when is uniform normal pressure observed between block and drum?
a. θ < 60 o
b. 2θ < 90 o
c. 2θ < 60 o
d. θ > 30 o
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Answer
Explanation
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ANSWER: 2θ < 60o
Explanation:
No explanation is available for this question!
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5) Which type of brakes have wooden blocks placed inside flexible steel band?
a. Block brake
b. Band brake
c. Band and Block brake
d. Pivoted block brake
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Answer
Explanation
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ANSWER: Band and Block brake
Explanation:
No explanation is available for this question!
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6) In the equation Rn = (pl) / (x – μ.a), if x < μ.a then the brakes are
a. self energizing
b. self locking
c. self starting
d. None of the above
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Answer
Explanation
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ANSWER: self locking
Explanation:
No explanation is available for this question!
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7) Determine the power transmitted if dead weight on brake is 70 kg and engine has a speed of 300 rpm. One end of the rope has a diameter of 0.05 m is attached to a spring balance which has reading of 150 N, diameter of drum is 1 m.
a. 8.851 kW
b. 8.851 W
c. 1319.46 W
d. none of the above
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Answer
Explanation
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ANSWER: 8.851 kW
Explanation:
No explanation is available for this question!
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8) Which parameters can be measured using a dynamometer?
a. Force
b. Torque
c. Power
d. All of the above
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Answer
Explanation
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ANSWER: All of the above
Explanation:
No explanation is available for this question!
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9) Identify the type of absorption dynamometer ?
a. Epicyclic dynamometer
b. Prony brake dynamometer
c. Torsion dynamometer
d. Tatham dynamometer
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Answer
Explanation
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ANSWER: Prony brake dynamometer
Explanation:
No explanation is available for this question!
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10) Which of the following statements is/are false?
a. To prevent heat generated due to friction, rope brake dynamometers are provided with cooling water
b. Angle of twist upto 1/10 of degree can be measured by Glibson flash light torsion dynamometer
c. In pneumatic brakes, the ratio between hydraulic pressure and air pressure is 15:1
d. All the above statements are false
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Answer
Explanation
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ANSWER: Angle of twist upto 1/10 of degree can be measured by Glibson flash light torsion dynamometer
Explanation:
No explanation is available for this question!
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