MCQ Hive - Changing Pathways to Wisdom

According to fan laws, at constant speed and capacity, the pressure and power vary_____________________?

A. Directly as the air or gas density
B. Inversely as square root of density
C. Inversely as density
D. As square of density

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Air vessels in reciprocating pump are used to__________________?

A. Smoothen flow
B. Reduce acceleration to minimum
C. Increase pump efficiency
D. Save pump from cavitation

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In axial flow fans and turbines, fluid enters and leaves as follows________________?

A. Radially, axially
B. Axially, radially
C. Axially, axially
D. Radially, radially

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The angle of taper on draft tube is A. greater than 15° B. greater than 8° C. greater than 5° D. less than 8° E. less than 3°.___________________? The angle of taper on draft tube is

A. Less than 8°
B. Greater than 15°
C. Greater than 8°
D. Greater than 5°

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Reaction turbines are used for____________________?

A. low head
B. high head
C. high head and low discharge
D. high head and high discharge

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The flow rate in gear pump___________________?

A. Increases with increase in pressure
B. Decreases with increase in pressure
C. More or less remains constant with in-crease in pressure
D. Unpredictable

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Guide angle as per the aerofoil theory of Kaplan turbine blade design is defined as the angle between_________________?

A. Lift and resultant force
B. Drag and resultant force
C. Lift and tangential force
D. Lift and drag

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Casting of a centrifugal pump is designed so as to minimize________________?

A. Friction loss
B. Cavitation
C. Static head
D. Loss of kinetic energy

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High specific speed of turbine implies it is__________________?

A. Propeller turbine
B. Francis turbine
C. Impulse turbine
D. Any one of the above

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The maximum number of jets generally employed in impulse turbine without jet interference is________________?

A. 4
B. 6
C. 8
D. 12

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