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Engineering
Mechanical
ME Set-1
Hydraulic Machines
31

Hydraulic Machines MCQ with Answers

31) The runaway speed of a hydraulic turbine is the speed

at full load

at which there will be no damage to the runner

corresponding to maximum overload permissible

at which the turbine will run freely without load

Answer is:

at which the turbine will run freely without load

Hydraulic Machines MCQ with Answers

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Related Hydraulic Machines MCQ with Answers

32) The speed of an imaginary turbine, identical with the given turbine, which will develop a unit power under a unit head, is known as

normal speed

unit speed

specific speed

none of these

Answer is:

specific speed

33) The efficiency of a Pelton wheel working under constant head ______ with the increase in power.

remains same

increases

decreases

none of the above

Answer is:

increases

34) The discharge through a reaction turbine ____ with the increase in unit speed

remains same

increases

decreases

none of the above

Answer is:

decreases

35) The efficiency of a reaction turbine for a given head _____ with the increase in speed.

Decreases

Increases

remains same

None of the above

Answer is:

Decreases

Hydraulic Machines MCQ with Answers

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