Hydraulics and Fluid Mechanics - Mechanical Engineering Questions and Answers

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to

1/2 × depth

1/2 × breadth

1/2 × sloping side

1/4 × (depth + breadth)

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

The pressure of liquid at throat in a Venturimeter is __________ than that at inlet.

Higher

Lower

Same

None of these

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A bucket of water is hanging from a spring balance. An iron piece is suspended into water without touching sides of bucket from another support. The spring balance reading will

Increase

Decrease

Remain same

Increase/decrease depending on depth of immersion

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

Fluid is a substance which offers no resistance to change of

Pressure

Flow

Shape

Volume

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

According to fan laws, at constant weight of air or gas, the speed, capacity and pressure vary

Directly as the air or gas density

Inversely as square root of density

Inversely as density

As square of density

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

For centrifugal pump impeller, the maximum value of the vane exit angle is

10° to 15°

15° to 20°

20° to 25°

25° to 30°

Whatsapp
Facebook
Copy
Copy Text
Copy
Copy URL
Share as Image
As Image

A hemispherical tank of radius (R) has an orifice of cross-sectional area (a) at its bottom and is full of liquid. The time required to empty the tank completely is

14π R1/2/15Cd × a √(2g)

14π R3/2/15Cd × a √(2g)

14π R5/2/15Cd × a √(2g)

14π R7/2/15Cd × a √(2g)