Hydraulic Machines - Section 1 (5)

Directions to Solve

Hydraulic Machines - Section 1

33.

Multi-stage centrifugal pumps are used to

A.	give high discharge
B.	produce high heads
C.	pump viscous fluids
D.	all of these

Answer: Option B

Explanation:

No answer description available for this question.

34.

The efficiency of a centrifugal pump will be maximum when the blades are bent backward.

A.	Yes
B.	No

Answer: Option A

Explanation:

No answer description available for this question.

35.

Slip of a reciprocating pump is defined as the

A.	ratio of actual discharge to the theoretical discharge
B.	sum of actual discharge and the theoretical discharge
C.	difference of theoretical discharge and the actual discharge
D.	product of theoretical discharge and the actual discharge

Answer: Option C

Explanation:

No answer description available for this question.

36.

The power produced by the reaction turbine is __________ to the head of water.

A.	directly proportional
B.	inversely proportional

Answer: Option A

Explanation:

No answer description available for this question.

37.

In a reaction turbine, the draft tube is used

A.	to run the turbine full
B.	to prevent air to enter the turbine
C.	to increase the head of water by an amount equal to the height of the runner outlet above the tail race
D.	to transport water to downstream

Answer: Option C

Explanation:

No answer description available for this question.

38.

Discharge of a centrifugal pump is (where N = Speed of the pump impeller)

A.	directly proportional to N
B.	inversely proportional to N
C.	directly proportional to N2
D.	inversely proportional to N2

Answer: Option A

Explanation:

No answer description available for this question.

39.

A ship with jet propulsion draws water through inlet orifices at right angles to the direction of its motion. The propelling force of the jet is (where a = Area of the jet, V_r = Relative velocity of the jet and ship = V + v, v = Velocity of the ship, and V = Velocity of the jet issuing from the ship)

A.
B.
C.
D.

Answer: Option B

Explanation:

No answer description available for this question.

40.

The speed of a turbine runner is

A.	directly proportional to H1/2
B.	inversely proportional to H1/2
C.	directly proportional to H3/2
D.	inversely proportional to H3/2

Answer: Option A

Explanation:

No answer description available for this question.

Hydraulic Machines - Section 1 (5)

Hydraulic Machines - Section 1

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