**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 IF YOU THINK ANY OF THE MCQ ABOVE IS WRONG. PLEASE COMMENT WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION IN COMMENT BOX. THANK YOU**

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