Mechanical Engineering - MCQ Practice Questions

A clutch is designed to transmit 15 kW at 1500 rpm. If the coefficient of friction is 0.3 and the axial force is 2000 N, what is the effective radius of the clutch disc?

In a spur gear design, what is the primary function of backlash?

A flat belt connects two pulleys with diameters 300 mm and 600 mm. The center distance is 1200 mm. Calculate the belt length approximately.

Which of the following materials is preferred for manufacturing flexible couplings?

In a helical gear pair with 40° helix angle, what is the axial thrust force if the tangential force is 5000 N?

What is the Lewis form factor for a 20° involute spur gear with 25 teeth?

A journal bearing is subjected to a radial load of 10 kN with shaft speed of 600 rpm. If bearing length is 80 mm and shaft diameter is 50 mm, find the bearing pressure (Hertzian pressure approximation).

In a screw-jack with pitch 8 mm and mean diameter 40 mm, if the efficiency is 25%, what is the mechanical advantage?

What is the primary advantage of using roller bearings over ball bearings in heavy industrial applications?

A wire rope with diameter 16 mm has a tensile strength of 1770 MPa. Calculate the breaking load if the rope has 6×19 construction (core factor = 0.55).

In a sliding contact bearing, which parameter represents the bearing characteristic number?

A cone clutch has cone angle 15°, outer radius 150 mm, inner radius 100 mm, and coefficient of friction 0.25. Find the torque capacity for 3000 N axial force.

Which of the following is NOT a function of a coupling in power transmission systems?

In a multi-plate friction brake with n = 8 plates, coefficient of friction μ = 0.35, and plate radius R = 200 mm, find braking torque for 5000 N axial force.

What is the critical design consideration for a keyway in a shaft?

A V-belt pulley has groove angle 36°. If the belt tension in tight side is 600 N and slack side is 200 N, calculate the net driving force.

In gear nomenclature, what does the module represent?

A tapered roller bearing has pitch diameter 80 mm and contact angle 12°. Calculate the radial load capacity factor if axial load is 2000 N.

Which type of gear arrangement is suitable for power transmission between skew axes?

In a chain drive with sprocket teeth numbers N₁ = 20 and N₂ = 60, chain pitch = 12.7 mm, speed of motor shaft = 1500 rpm, find the linear chain velocity.