Top 150+ Solved Theory of Mechanics MCQ Questions Answer
Q. Friction torque transmitted by a disc or plat clutch is same as that of ____.
a. flat pivot bearing
b. flat collar bearing
c. conical pivot bearing
d. truncated conical pivot bearing
Q. For multiple plate friction clutch with n plates, the number of active surfaces n
a. n
b. n+1
c. n-1
d. n/2
Q. Torque transmitted by single plate clutch with axial spring load = 1 kN, and inner and outer radii of 10 cm and 15 cm and µ = 0.5 with assumption of uniform wear is ____.
a. 250 n-m
b. 125 n-m
c. 62.5 n-m
d. not possible to find with given data
Q. Determine the axial force required to engage a cone clutch transmitting 25 kW power at 750 rpm. Average friction diameter of the cone is 400 mm, semicone angle 10 degree and coefficient of friction 0.25.
a. 325.30 nm and 1100.25 n
b. 318.31 nm and 1105.47 n
c. 320.25 nm and 1008.20 n
d. 325.89 nm and 1120.30 n
Q. Determine the axial force required to engage a cone clutch transmitting 25 kW power at 750 rpm. Average friction diameter of the cone is 400 mm, semicone angle 60 degree and coefficient of friction 0.25.
a. 325.30 nm and 1100.25 n
b. 318.31 nm and 1105.47 n
c. 320.25 nm and 1008.20 n
d. 325.89 nm and 1120.30 n
Q. Can simple band brake be made of self-locking type?
a. yes
b. yes, but it will need many modifications
c. yes, but with few limitations
d. no
Q. Material used for brake lining should not have ___.
a. high heat dissipation capacity
b. low heat resistance
c. high strength
d. high coefficient of friction
Q. pivoted block brake is a kind of ____.
a. single block brake
b. shoe brake
c. differential expanding band brake
d. internal expanding shoe brake
Q. Which type of brakes are used in electric crane?
a. internal expanding shoe brake
b. differential band brake
c. single block brake
d. double bloke brake
Q. Brakes used in Railway engine are____.
a. band brake
b. internal expending brake
c. shoe brake
d. band and block brake
Q. The brake commonly used in motor cars ____.
a. shoe brake
b. band brake
c. band and block brake
d. internal expanding brake
Q. When will the distance travelled by 4-wheel be less after braking?
a. applied to rear wheel
b. when brakes applied to front wheel
c. when brakes applied to all 4-wheels
d. when brakes applied to rear wheel gradually