MCQs of Centrifugal Pumps (Fluid Mechanics and Hydraulic Machines - 3141906)

Showing 21 to 30 out of 35 Questions

21.

Centrifugal pumps dealing with muds have an impeller of the type

22.

Head developed by a centrifugal pump depends on

23.

In a centrifugal pump, the inlet angle will be designed to have

(a)	relative velocity vector in the radial direction
(b)	absolute velocity vector in the radial direction
(c)	the velocity of flow to be zero
(d)	peripheral velocity to be zero

24.

In a centrifugal pump with the radial entry of liquid, the manometric efficiency is given by

25.

D

is the diameter of the impeller at the inlet,

w

is the width of the impeller at the inlet and

V_{f}

is the velocity of flow at the inlet, then discharge through a centrifugal pump is

26.

The ratio of the actual measured head to the head imparted to the fluid by the impeller is known as

27.

The ratio of the rotor power to the shaft power is known as

28.

The ratio of the water power to the shaft power is known as

29.

The manometric head is given by

(a)	$\frac{1}{g} ({V_{w}}_{2} u_{2})$
(b)	$(\frac{P_{o}}{ρ g} + \frac{V_{0}^{2}}{2 g} + Z_{o}) - (\frac{P_{i}}{ρ g} + \frac{V_{i}^{2}}{2 g} + Z_{i})$
(c)	$(h_{s} + h_{d}) + ({h_{f}}_{s} + {h_{f}}_{d}) + \frac{V_{d}^{2}}{2 g}$
(d)	all of the above

30.

The process of filling the liquid into the suction pipe and the pump casing up to the level of the delivery valve is called

Showing 21 to 30 out of 35 Questions