HYDRAULICS AND FLUID MECHANICS IN ME QUIZ

Rotameter is a device used to measure

rotation

flow

velocity of fluid

absolute pressure

TRUE ANSWER : ?
YOUR ANSWER : ?

In a lock-gate, the reaction between two gates is (where P = Resultant pressure on the lock gate, and α = Inclination of the gate with the normal to the side of the lock)

p/2sinα

2p/sin (α/2)

p/sinα

2p/sinα

TRUE ANSWER : ?
YOUR ANSWER : ?

The value of friction factor ‘f’ for smooth pipes for Reynolds number 106 is approximately equal to

0.01

0.1

0.0001

0.001

TRUE ANSWER : ?
YOUR ANSWER : ?

Slip of a reciprocating pump is negative, when

Suction pipe is short and pump is running at low speeds

Suction pipe is short and delivery pipe is long and the pump is running at low speeds

Suction pipe is long and delivery pipe is short and the pump is running at high speeds

Delivery pipe is long and pump is running at high speeds

TRUE ANSWER : ?
YOUR ANSWER : ?

If the coefficient of discharge is 0.6, then the discharge over a right angled notch is

0.417 H5/2

1.417 H5/2

4.171 H5/2

7.141 H5/2

TRUE ANSWER : ?
YOUR ANSWER : ?

Gauge pressure at a point is equal to the absolute pressure ___ the atmospheric pressure.

Divide

Multiply

Minus

Plus

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YOUR ANSWER : ?

A metal with specific gravity of o floating in a fluid of same specific gravity a will

be fully immersed with top surface at fluid surface

sink to bottom

float over fluid

partly immersed

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YOUR ANSWER : ?

The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is

Medium speed with radial flow at outlet

High speed with radial flow at outlet

High speed with axial flow at outlet

Slow speed with radial flow at outlet

TRUE ANSWER : ?
YOUR ANSWER : ?

A vessel of 4 m3 contains oil which weighs 30 kN. The specific weight of the oil is

4.5 kN/m3

6 kN/m3

10 kN/m3

7.5 kN/m3

TRUE ANSWER : ?
YOUR ANSWER : ?

Hydrometer is used to determine

specific gravity of solids

specific gravity of gases

relative humidity

specific gravity of liquids

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YOUR ANSWER : ?