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Gearup-JE'19: Machine Design Quiz-3
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Question 1
Which of the following(s) are the desirable properties of friction materials used in clutches?
Question 2
The ratio of friction radius based upon uniform pressure and uniform wear theory is (Given : 
= 200 mm and 
= 35 mm )
= 200 mm and = 35 mm ) Question 3
A single plate clutch consist of single pair of contacting surfaces. The inner and outer diameters of friction disc are 125mm and 250 mm. the coefficient of friction is 0.25 and the total axial force is 15 KN. The power transmitting capacity of the clutch at 600 rpm using uniform wear theory is
Question 4
A clutch has inner dia. 120 mm, outer dia. 200 mm and available coefficient of friction between the plates is 0.35. Torque carrying capacity of clutch is 200 N-m. Calculate pressure (Mpa) in the clutch at 55 mm radius. Assume uniform wear condition.
Question 5
A single shoe block brake is shown in the figure, drum diameter is 300 mm and μ = 0.3, the braking torque is 135 N-m,
Calculate the force P(in N)_____.
Calculate the force P(in N)_____.
Question 6
A single – plate clutch has a friction disc with inner and outer radii of 20 mm and 40 mm, respectively. The friction lining in the disc is made in such a way that the coefficient of friction mvaries radially as m=0.01 r, where r is in mm. The clutch needs to transmit a friction torque of 18.85 kN.mm. As per uniform pressure theory, the pressure (in MPa) on the disc is ________
Question 7
The appropriate position of the clutch in a vehicle is
Question 8
In a single plate clutch(n=1) axial force is 4 kN. The inside diameter of contact surface is 100 mm and the outside diameter is 200 mm. For a new clutch, the torque in Nm will be ( µ=0.25)
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