# Hydraulic System and Components - 4 - MCQs with Answers

## Hydraulic System and Components – 4 – MCQs with Answers

1. What is the advantage of flexible vane pump?

a. they can handle solids which are of large size
b. they can create good vacuum
c. both a and b
d. none of the above

ANSWER: b. they can create good vacuum

2. Cartridge kits generate pumping chambers of various sizes, which

a. increase the flow rate
b. decrease the flow rate
c. increase and decrease the flow rate
d. none of the above

ANSWER: c. increase and decrease the flow rate

3. Which of the following statements is false for vane pumps?

a. wear in contact surfaces occurs due to continuous contact between vane tips and the cam ring
b. different sizes of cartridge kits can be replaced in same vane pump
c. elliptical cam ring is replaced by round cam ring to reduce unbalanced forces
d. none of the above

ANSWER: c. elliptical cam ring is replaced by round cam ring to reduce unbalanced forces

4. Balanced vane pumps are designed to have

a. fixed displacement
b. variable displacement
c. both fixed and variable displacement
d. none of the above

5. Cam ring of unbalanced vane pump is

a. round
b. elliptical
c. both a and b
d. both of the above

6. In pressure compensated vane pump,

1. having variations in eccentricity between rotor and cam ring gives variable displacement
2. as eccentricity between rotor and cam decreases, flow of fluid decreases
3. as eccentricity between rotor and cam decreases, flow of fluid increases
4. having variations in eccentricity between rotor and cam ring gives fixed displacement

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

7. What is the relation between speed and flow rate for fixed displacement vane pump?

a. flow rate increases with increase in speed of rotor
b. flow rate decreases with increase in speed of rotor
c. flow rate is constant and does not change with change in speed
d. none of the above

ANSWER: a. flow rate increases with increase in speed of rotor

8. In fixed displacement vane pump,

a. flow rate decreases with increase in working pressure
b. flow rate increases with increase in working pressure
c. flow rate is constant and does not change with working pressure
d. none of the above

ANSWER: a. flow rate decreases with increase in working pressure

9. What effect does working pressure have on input power for radial piston pumps?

a. as working pressure increases input power decreases
b. as working pressure increases input power increases
c. pressure remains constant for different input powers
d. none of the above

ANSWER: b. as working pressure increases input power increases

10. Radial piston pumps can have,

a. cylinder block rotating and cam stationary
b. cylinder block stationary and cam rotating
c. both a and b
d. none of the above