851. Discharge of a centrifugal pump is
A. directly proportional to diameter of its impeller
B. inversely proportional to diameter of its impeller
C. directly proportional to (diameter)2 of its impeller
D. inversely proportional to (diameter)2 of its impeller

852. A Pelton wheel develops 1750 kW under a head of 100 metres while running at 200 r.p.m. and discharging 2500 litres of water per second. The unit power of the wheel is
A. 0.25 kW
B. 0.75 kW
C. 1.75 kW
D. 3.75 kW

853. The static head of a centrifugal pump is equal to the __________ of suction head and delivery head.
A. product
B. difference
C. sum

854. The ratio of actual work available at the turbine to the energy imparted to the wheel is known as __________ efficiency.
A. hydraulic
B. mechanical
C. overall

855. Geometric similarity is said to exist between the model and the prototype, if both of them
A. have identical velocities
B. are equal in size and shape
C. are identical in shape, but differ only in size
D. have identical forces

856. The coefficient of viscosity may be determined by
A. capillary tube method
B. orifice type viscometer
C. rotating cylinder method
D. all of these

857. The stability of a dam is checked for
A. tension at the base
B. overturning of the wall or dam
C. sliding of the wall or dam
D. all of these

858. A manometer is used to measure
A. low pressure
B. moderate pressure
C. high pressure
D. atomospheric pressure

859. The centre of gravity of the volume of the liquid displaced is called
A. centre of pressure
B. centre of buoyancy
C. metacentre
D. none of these

860. The coefficient of discharge for an external mouthpiece is
A. 0.375
B. 0.5
C. 0.707
D. 0.855

NOTE
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