Theory of Machines MCQ with Answers

141) The static balancing is satisfactory for low speed rotors but with increasing speeds, dynamic balancing becomes necessary. This is because, the

Answer is:

effects of unbalances are proportional to the square of the speed

142) The maximum fluctuation of speed is the

Answer is:

difference of the maximum and minimum speeds

143) A Porter governor is a

Answer is:

dead weight governor

144) A type-writer constitutes a machine.

Answer is:

No

145) Due to slip of belt, the velocity ratio of the belt drive increases.

Answer is:

No

Explanation:

The ratio between the velocities of driver pulley and driven pulley is known as velocity ratio. Due to slip of belt, the velocity ratio of the belt drive decreases.