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Which of the following brakes is commonly used in motor cars?

This question was previously asked in
UKPSC JE Mechanical 2013 Official Paper I
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  1. Bank Brake
  2. Shoe Brake
  3. Band and Block Brake
  4. Internal Expanding Shoe Brake

Answer (Detailed Solution Below)

Option 4 : Internal Expanding Shoe Brake
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Detailed Solution

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Concept:

Internal expanding brake:

  • An internal expanding brake consists of two shoes.
  • The outer surface of the shoes is lined with some friction material to increase the coefficient of friction and to prevent wearing away of the metal. 
  • The friction between the shoes and the drum produces the braking torque and hence reduces the speed of the drum.
  • This type of brake is commonly used in motor cars and light trucks.

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More Types of Brakes Questions

Q1.A brake-block shown below has a face width of 300 mm.  The mean coefficient of friction is 0.25. For an activating force of 400 N, the braking torque in Nm is
Q2.Disc brakes are advantageous than drum brakes except _______.
Q3.All of the following are the selection characteristics considered while choosing a material for brake lining EXCEPT: 
Q4.In block brakes, the ratio of shoe width and drum diameter is kept between
Q5.A belt runs over a pulley. The angle of the lap is 165°. If the coefficient of friction is 0.3, then the ratio of tension (T1/T2) is
Q6.In a simple band brake, tension on tight side is 336 N; tension on slack side is 125.8 N; if radius of brake drum is 100 mm; then braking torque value will be
Q7.In a band brake, the tension in the band decreases from the value P1 at the pivot side of the band to P2 at the lever side. If r is the radius of the drum, then the net torque on the drum is
Q8.Consider the following statements regarding the parameters involved in the rating of clutches and brakes: 1. Torque required to accelerate or decelerate the system. 2. Time required to accomplish the speed change. 3. The cycling rate is required. Which of the above statements is/are correct?
Q9.Wear rating of a long shoe drum brake is
Q10.In a band and block brake, the ratio of tensions on tight side and slack side of the band is ________. (where μ = coefficient of friction between the block and drum, θ = Semi-angle of each block subtending at the centre of drum and n = Number of blocks.)

More Brakes Questions

Q1.A brake-block shown below has a face width of 300 mm.  The mean coefficient of friction is 0.25. For an activating force of 400 N, the braking torque in Nm is
Q2.Disc brakes are advantageous than drum brakes except _______.
Q3.All of the following are the selection characteristics considered while choosing a material for brake lining EXCEPT: 
Q4.The heat generated in brake depends upon, Where P = intensity of normal pressure (N/mm2) V = rubbing speed (m/min)
Q5.In block brakes, the ratio of shoe width and drum diameter is kept between
Q6.Brake fade is
Q7.A belt runs over a pulley. The angle of the lap is 165°. If the coefficient of friction is 0.3, then the ratio of tension (T1/T2) is
Q8.In a simple band brake, tension on tight side is 336 N; tension on slack side is 125.8 N; if radius of brake drum is 100 mm; then braking torque value will be
Q9.In a band brake, the tension in the band decreases from the value P1 at the pivot side of the band to P2 at the lever side. If r is the radius of the drum, then the net torque on the drum is
Q10.Consider the following statements regarding the parameters involved in the rating of clutches and brakes: 1. Torque required to accelerate or decelerate the system. 2. Time required to accomplish the speed change. 3. The cycling rate is required. Which of the above statements is/are correct?
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