Oil Hydraulics and Pneumatics (3151913) MCQs

MCQs of Hydraulic Pumps, Motors,Valves and Actuators

Showing 31 to 40 out of 53 Questions
1 2 3 4 5 6
31.

In which control valve energy consumption reduces as load decreases?

(a)

Conventional direction control valve
(b)

Proportional direction control valve
(c)

Both of the given
(d)

None of the given
Answer:

Option (b)

32.

Why are electromechanical relays more popular than solid state relays?

(a)

Reliability
(b)

Cost-effective
(c)

Both of the given
(d)

None of the given
Answer:

Option (c)

33.

Which valve gets activated only in one direction that is forward or backward movement of the piston rod?

(a)

Roller lever valve
(b)

Idle roller valve
(c)

Both of the given
(d)

None of the given
Answer:

Option (b)

34.

Which of the following is used to sense the initial and final positions of a piston rod?

(a)

Lever operated direction control valve
(b)

Limit switch
(c)

Roller lever valve
(d)

All of the given
Answer:

Option (d)

35.

Which valve is also known as the memory valve?

(a)

Single pilot signal valve
(b)

Double pilot signal valve
(c)

Roller lever valve
(d)

Logic valve
Answer:

Option (b)

36.

What is the difference between regulator and pressure switch?

(a)

The regulator operates at set value pressure while the pressure switch operates with slight fluctuation in pressure
(b)

The pressure switch operates at set value pressure while the regulator operates with slight fluctuation in pressure
Answer:

Option (a)

37.

What is the difference between the pressure relief valve and pressure reducing valve?

(a)

Pressure reducing valve is connected between pump and tank line while pressure relief valve is connected between DCV and branch circuit
(b)

Pressure relief valve is always normally opened
(c)

Pressure reducing valve is connected between DCV and branch circuit while pressure relief valve is connected between pump and tank
(d)

None of the given
Answer:

Option (c)

38.

How is reverse flow possible in pilot operated check valve?

(a)

Spring force lifts the ball due to which reverse flow is possible
(b)

Fluid pressure lifts the ball due to which reverse flow is possible
(c)

Both of the given
(d)

None of the given
Answer:

Option (b)

39.

In single-acting hydraulic cylinders, the piston comes back to its original position due to_______.

(a)

Spring force
(b)

Self weight
(c)

Momentum of a flywheel
(d)

All of the given
Answer:

Option (d)

40.

Why are hydraulic cylinders cushioned?

(a)

Cushioning decelerates the piston of a cylinder
(b)

Stress and vibrations can be reduced
(c)

Both of the given
(d)

None of the given
Answer:

Option (c)

Showing 31 to 40 out of 53 Questions
1 2 3 4 5 6