# Fluid Power Actuators - 3 - MCQs with Answers

## Fluid Power Actuators – 3 – MCQs with Answers

1. Which factor is considered while selecting the diameter of piston rod in hydraulic cylinder?

a. bore diameter
b. length of stroke
d. all the above

2. Which end of the hydraulic cylinder, the male clevis is mounted on?

a. cap end
b. rod end
c. both a and b
d. none of the above

ANSWER: c. both a and b

3. Which of the following is used for mounting purpose in hydraulic cylinders?

a. Female clevis
b. Circular flange
c. Trunnion
d. All the above

4. How does cushioning affect the speed of the piston when the cylinder is cushioned at extreme end?

a. cushioning decreases the speed of piston near the extreme ends of the cylinder
b. cushioning increases the speed of piston near the extreme ends of the cylinder
c. cushioning increases the speed of piston at the beginning of the stroke in the cylinder
d. cushioning decreases the speed of piston at the beginning of the stroke in the cylinder

ANSWER: a. cushioning decreases the speed of piston near the extreme ends of the cylinder

5. In adjustable type of cushioning,

a. piston rod can be moved at very slow speed
b. piston rod can be moved at increased speed
c. both a and b
d. none of the above

ANSWER: c. both a and b

6. What causes reduction in speed of the piston rod when the hydraulic cylinder is cushioned?

a. oil flow through small space
b. back pressure created in the system
c. both a and b
d. none of the above

ANSWER: c. both a and b

7. Which of the following is a type of cushioning in hydraulic cylinders?

a. trunnion cushioning
c. clevis cushioning
d. none of the above

8. What is the function of hydraulic motor?

1. hydraulic motor converts hydraulic oil under pressure into torque and angular displacement
2. hydraulic motor converts hydraulic oil under pressure into force and linear displacement
3. hydraulic motor converts hydraulic energy into mechanical energy
4. hydraulic motor converts mechanical energy into hydraulic energy

a. 1 and 4
b. 1 and 3
c. 2 and 3
d. 2 and 4

9. Low-torque high-speed motors are used in

a. cranes
b. winches
c. fans
d. all the above

10. Which motor causes heavy loads due to its usage in order to move at constant lower speeds?

a. Low-torque high-speed motors
b. High-torque low-speed motors
c. both a and b
d. none of the above