Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Flow Measuring Devices

Showing 1 to 10 out of 26 Questions
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1.
Which of the following instruments is used to measure flow on the application of Bernoulli's equation
(a) venturimeter
(b) orifice plate
(c) pitot tube
(d) all of the above
Answer:

Option (d)

2.
For measuring flow by a venturimeter, it should be installed in
(a) Vertical line
(b) Horizontal line
(c) Inclined line with upward flow
(d) In any direction and at any location
Answer:

Option (d)

3.
The length of the divergent portion of venturimeter in comparison to the convergent portion is
(a) same
(b) more
(c) less
(d) more or less depending on capacity
Answer:

Option (b)

4.
In a venturimeter, the velocity of the liquid at the throat is
(a) higher than inlet
(b) higher than outlet
(c) lesser than inlet
(d) minimum
Answer:

Option (a)

5.
The velocity of the liquid flowing through the divergent portion of a Venturimeter
(a) Remains constant
(b) Increases
(c) Decreases
(d) Depends upon mass of liquid
Answer:

Option (c)

6.
The actual velocity at vena contracta for flow through an orifice from a reservoir of height H is
(a) (2gH)0.5
(b) Cv(2gH)0.5
(c) Cd(2gH)0.5
(d) none of the above
Answer:

Option (b)

7.
The theoretical velocity of jet at vena contracta is
(a) 2gH
(b) H × √(2g)
(c) 2g × √H
(d) √2gH
Answer:

Option (d)

8.
The discharge through an orifice fitted in a tank can be increased by
(a) fitting a short length of pipe to the outside
(b) sharpening the edges of the orifice
(c) fitting a long length of pipe to the outside
(d) all of the above
Answer:

Option (a)

9.
The pitot tube is used for measurement of
(a) pressure
(b) flow
(c) velocity
(d) discharge
Answer:

Option (c)

10.
Which of the following instrument can be used for measuring the speed of a submarine moving in deep-sea?
(a) venturimeter
(b) hot wire anemometer
(c) rotameter
(d) pitot tube
Answer:

Option (d)

Showing 1 to 10 out of 26 Questions
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