Oil Hydraulics and Pneumatics (3151913) MCQs

MCQs of Hydraulic Pumps, Motors,Valves and Actuators

Showing 11 to 20 out of 53 Questions
11.

What is the difference between vane pump and radial piston pump?

(a)

In radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate pistons

(b)

In radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate swashplate

(c)

In radial piston pump, radial slots in vane pumps are replaced by radial bores which accommodate both swash plate and pistons

(d)

None of the above

Answer:

Option (a)

12.

In the adjustable type of cushioning,

(a)

The piston rod can be moved at very slow speed

(b)

The piston rod can be moved at increased speed

(c)

Both of the given

(d)

None of the given

Answer:

Option (c)

13.

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

(a)

Cushioning decreases the speed of the piston near the extreme ends of the cylinder

(b)

Cushioning increases the speed of the piston near the extreme ends of the cylinder

(c)

Cushioning increases the speed of the piston at the beginning of the stroke in the cylinder

(d)

Cushioning decreases the speed of the piston at the beginning of the stroke in the cylinder

Answer:

Option (a)

14.

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

(a)

Bore diameter

(b)

Length of stroke

(c)

Load

(d)

All of the given

Answer:

Option (d)

15.

Which factor decides the working pressure of a hydraulic cylinder?

(a)

The diameter of circular flange

(b)

The bore diameter of the cylinder

(c)

Stroke length

(d)

All of the above

Answer:

Option (b)

16.

Which type of hydraulic cylinder has one piston connected to piston rod extended on both the sides of the cylinder?

(a)

Telescopic cylinder

(b)

Tandem cylinder

(c)

Both of the given

(d)

None of the given

Answer:

Option (b)

17.

Telescopic cylinders have____

(a)

Only two-stage units

(b)

Only three-stage units

(c)

Two or three-stage units

(d)

Multistage units

Answer:

Option (d)

18.

What is the relation between pressure and overall efficiency for a gear pump?

(a)

As pressure increases, overall efficiency decreases

(b)

As pressure increases, overall efficiency increases

(c)

Overall efficiency is not affected by a change in pressure

(d)

Cannot say

Answer:

Option (a)

19.

How does the fluid flow in the internal gear pump?

(a)

Fluid enters the suction side between the rotor, which is a large exterior gear, and the idler which is a small interior gear

(b)

Fluid enters the suction side between the rotor, which is a small exterior gear, and idler which is a large interior gear

(c)

Fluid enters the suction side between the rotor and idler which rotate in different directions

(d)

None of the above

Answer:

Option (a)

20.

The rotation of gears in the internal gear pump takes place in

(a)

Same direction

(b)

Different direction

Answer:

Option (a)

Showing 11 to 20 out of 53 Questions