1000+ Hydraulic Machines Objective Questions and Answers Pdf - 1

Question: 1

The hydrostatic force acts through

(A) centre of bottom edge

(B) centre of pressure

(C) centre of top edge

(D) metacentre

Ans: B

centre of pressure

Question: 2

Hydraulic radius is equal to

(A) area divided by the square of wetted perimeter

(B) square root of the area

(C) wetted perimeter divided by area

(D) area divided by wetted perimeter

Ans: D

area divided by wetted perimeter

Question: 3

Cavitation

(A) causes sudden drop in power output

(B) reduces discharge

(C) causes vibration of various parts of turbine and creates noise

(D) all the above

Ans: D

all the above

Question: 4

A pump is a device which converts

(A) mechanical energy into electrical energy

(B) mechanical energy into hydraulic energy

(C) hydraulic energy into mechanical energy

(D) none of the above

Ans: B

mechanical energy into hydraulic energy

Question: 5

Specific weight of liquid

(A) does not vary on any other planet

(B) varies from place to place on the earth

(C) does not remain constant at every place

(D) remains constant at every place

Ans: A

does not vary on any other planet

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