Top 150+ Solved Theory of Mechanics MCQ Questions Answer
Q. A single block brake as shown in Fig.6 has a brake drum diameter of 1m and the angle of contact is 300. It takes 280 Nm torque at 300rpm. The coefficient of friction is 0.35. Determine the required force 'P' to be applied when the rotation of drum is clockwise.
a. 378.99 n
b. 420.99 n
c. 435.45 n
d. 450.38 n
Q. For above question determine the required force 'P' to be applied when the rotation of drum is anticlockwise.
a. 378.99 n
b. 420.99 n
c. 435.45 n
d. 450.38 n
Q. In a simple band brake applied to a shaft carrying a flywheel of mass 250kg and radius of gyration 350mm , one end of the band is attached to the fulcrum and the other at a distance 300 mm from the fulcrum. The angle embraced by the band is 2250 and the brake drum diameter is 220 mm coefficient of friction 0.25 and the shaft speed is 300 rpm clockwise. Determine the brake torque when a force of 150 N is applied
a. 102.99 n
b. 105.24 n
c. 103.26 n
d. 195.38 n
Q. A dynamometer is a device used for measuring
a. power developed by a machine
b. torque developed by a machine
c. power absorbed by a machine
d. all the above
Q. Dynamometer is a device for measuring ____
a. torque exerted by the machine
b. power developed by the machine
c. power absorbed by the machine
d. all of the above
Q. Which of the following is classified a absorption type of dynamometer?
a. prony brake dynamometer
b. rope brake dynamometer
c. hydraulic dynamometer
d. all of the above
Q. Which of the following is classified as transmission type of dynamometer?
a. prony brake dynamometer
b. rope brake dynamometer
c. hydraulic dynamometer
d. epicyclic dynamometer
Q. Which of the following is an absorption type dynamometer?
a. prony brake dynamometer
b. rope brake dynamometer
c. epicyclic-train dynamometer
d. both a and b
Q. An example of an absorption type dynamometer is ___
a. prony brake dynamometer
b. epicyclic train dynamometer
c. torsion dynamometer
d. belt transmission dynamometer
Q. An example of a transmission dynamometer is______
a. prony brake dynamometer
b. rope brake dynamometer
c. froude dynamometer
d. torsion dynamometer
Q. Which of the following is classified as absorption dynamometer?
a. prony brake dynamometer
b. rope brake dynamometer
c. froude\s hydraulic dynamometer
d. all of the above
Q. Which of the following is classified as transmission dynamometer?
a. torsion dynamometer
b. froude\s hydraulic dynamometer
c. belt dynamometer or tathan dynamometer
d. prony brake dynamometer
Q. In case of dynamometer function of counter weight is to _____
a. balance the brake when unloaded
b. adjust pressure on pulley to control speed
c. prevent rotation of block due to fraction between block and pulley
d. to clamp the blocks
Q. Cooling water is used in________
a. prony brake dynamometer
b. epicyclic gear train dynamometer
c. torsion dynamometer
d. rope brake dynamometer