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In the following list of pumps, which is not a positive displacement pump ?
A) Vane pump B) Gear pump
C) Centrifugal pump D) Lobe pump

A jet of water with velocity 15 m/s hits a moving vertical plate with 5 m/s. What is the
force exerted by the jet, if its cross sectional area is 1 cm? ?

A) 1N 8) 1010 0) 1010५ D) 100 kN

Specific speed of a turbine is expressed as
A) NVQ/H3/4 B) NVP/H34 C) NVP/H5/4 D) NVQ/H5/4

Estimate the specific speed of a centrifugal pump running at 100 rpm working against
a head of 1 m with a flow rate of 100 m°/s.

A) 1000 rpm B) 100 rpm ©) 10 rpm D) 1 rpm

A draft tube is not essential for the working of a
A) Propeller turbine B) Kaplan turbine
C) Francis turbine D) Pelton turbine

What is the range of coefficient of discharge (C 4) for a venturimeter ?
A) 0.5 - 0.6 8) 0.6 - 0.7 ©) 0.7 - 0.8 0) 0.9 -1.0

For a cube completely immersed in water, which of the following statements is correct ?
A) Centre of gravity and centre of buoyancy coincides

B) Centre of gravity lies above centre of buoyancy

C) Centre of gravity lies below centre of buoyancy

D) Can not determine

Which of the following statements are true for an isolated system ?
i. The total energy of the system always remains zero.

ர்‌. The total energy is constant.

iii. The entropy of the system always remains constant.

iv. The entropy of the systems will be greater than or equal to zero.

A

B

0

0

i and iv

ii and iv

None of the above
All the above