1. Which of these is NOT an advantage of Timing Belts over Timing Chains? OA. They are lighter
OB. They are quieter
OC. They last longer
OD. They do not require lubrication

Aplate clutch has a single pair of mating friction surfaces 250-mm od by 175-mm id. the mean value of the coefficient of friction is 0.30, and the actuating force is 4 kn. a) find the maximum pressure and the torque capacity using the uniform-wear model. b) find the maximum pressure and the torque capacity using the uniform-pressure model.

Shafts are machine elements that are used to a) carry axial loads b) direct shear loads c) transmit power d) rotate at constant speed e) none of the above circular and square shafts subjected to the same torque under the same circum behave a) the same way b) almost the same way

What is the heat treatment of metals? what is the benefit of it? why and how it's useful? answer in details, do not write by hand.