Test: Friction Clutches - 3 - Mechanical Engineering MCQ
10 Questions MCQ Test Topicwise Question Bank for Mechanical Engineering - Test: Friction Clutches - 3
The frictional torque transmitted in a flat pivot bearing assuming uniform wear
(Uniform pressure)A single clutch operating under dry sliding condition transmits 150 Nm. The average coefficient of friction is 0.3 and maximum operating pressure is 0.5 MPa. The ratio between the outside radius and inner radius is 1.73. Under uniform wear conditions, if the outside radius of the clutch is to be minimum, the inside radius will have to be
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Consider the following statements regarding a centrifugal clutch:
1. It need not be unloaded before engagement.
2. It enables the prime mover to start up under no-load conditions.
3. It picks up the load gradually with the increase in speed.
4. It will not slip to the point of destruction.
5. It is very useful when the power unit has a low starting torque.
Q. Which of these are the advantages of a centrifugal clutch?
1. It need not be unloaded before engagement.
2. It enables the prime mover to start up under no-load conditions.
3. It picks up the load gradually with the increase in speed.
4. It will not slip to the point of destruction.
5. It is very useful when the power unit has a low starting torque.
Q. Which of these are the advantages of a centrifugal clutch?
A clutch has outer and inner diameters 100 mm and 40 mm respectively. Assuming a uniform pressure of 2 MPa and coefficient of friction of liner material 0.4, the torque carrying capacity of the clutch is
A disc clutch is required to transmit 5 kW at 2000 rpm. The disc has a friction lining with coefficient of friction equal to 0.25. Bore radius of friction lining is equal 0.25 mm. Assume uniform contact pressure of 1 MPa. The value of outside radius of the friction lining is
Which one of the following statement is correct? In case of clutches, the uniform pressure theory:
Which one of the following is the correct expression for the torque transmitted by a conical clutch of outer radius R, inner radius r and semi-cone angle a assuming uniform pressure? (where W = total axial load and μ = coefficient of friction)
In a plate clutch axial force is 4 kN. The inside radius of contact surface is 50 mm and the outside radius is 100 mm. For uniform pressure the mean radius of friction surface will be
In the multiple disc clutch, if there are 6 discs on the driving shaft and 5 discs on the driven shaft, then the number of pairs of contact surfaces will be equal to
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45 videos|314 tests
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