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QUESTION: 1

The Bernoulli’s equation refers to conservation of

Solution:

Bernoulli’s equation refers to conservation of energy.

QUESTION: 2

How are the velocity coefficient C_{v}, the discharge coefficient C_{d} and the contraction coefficient C_{c} of an orifice related

Solution:

The relation between C_{d}, C_{c} and C_{v} is

C_{d} = C_{c}Cv

QUESTION: 3

The coefficient of velocity (C_{v}) for an orifice is

Solution:

QUESTION: 4

The equation of motion for a viscous fluid known as

Solution:

In Navier-Stokes equation pressure force, gravity force and viscous force are considered.

QUESTION: 5

The rate of flow through venturimeter varies as

Solution:

Rate of flow through a venturimeter is given as:

Hence

QUESTION: 6

A smooth pipe of diameter 200 mm carries water. The pressure in the pipe at section S1 (elevation:10 m) is 50 kPa. At section S2 (elevation:12 m) the pressure is 20 kPa and velocity is 2 ms^{-1}. Density of water is 1000 kgm^{-3} and acceleration due to gravity is 9.8 ms^{-2}. Which of the following is TRUE

Solution:

Applying Bernoulli’s equation between section S_{1} and S_{2}

as area is constant velocity head will be same

thus flow from S_{1} to S_{2} and head loss is 1.06 m.

QUESTION: 7

While measuring the velocity of air ρ = 1.2 kg/m^{3}, the difference in the stagnation and static pressure of a Pitot-static tube was found to be 380 Pa. The velocity at that location in m/s is

Solution:

QUESTION: 8

If a fluid jet discharging from a 50 mm diameter orifice has a 40 mm diameter at its vena contracta, then its coefficient of contraction will be

Solution:

QUESTION: 9

Match List-I with List-il and select the correct answer using the codes given below the lists:

List-I

A. Orifice meter

B. Broad crested weir

C. Pitot tube

D. Rotameter

List-Il

1. Measurement of flow in a channel

2. Measurement of velocity in a pipe/channel

3. Measurement of flow in a pipe of any inclination

4. Measurement of upward flow in a vertical pipe

Codes:

A B C D

(a) 3 1 4 2

(b) 1 3 2 4

(c) 3 1 2 4

(d) 1 3 4 2

Solution:

QUESTION: 10

A Pitot tube is used to measure the velocity of water in a pipe. The stagnation pressure head is 6 m and the static pressure head is 5 m. If the coefficient of tube is 0.98, then what is the velocity of flow?

Solution:

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