MCQs of Flow Through Pipes (Fluid Mechanics & Hydraulics - 3140611)

Fluid Mechanics & Hydraulics (3140611) MCQs

MCQs of Flow Through Pipes

Showing 31 to 40 out of 47 Questions

31.

The flow through a circular pipe is laminar. Now, the fluid through the pipe is replaced with a more viscous fluid and passed through the pipe again with the same velocity. What can we say about the nature of this flow?

(a)	The flow will become turbulent
(b)	The flow will be a transition flow
(c)	The flow will remain laminar
(d)	The Reynolds number of the earlier flow is required to answer this question

32.

Which of the following flows have the highest critical Reynolds number?

(a)	Flow in a pipe
(b)	Flow between parallel plates
(c)	Flow in an open channel
(d)	Flow around spherical body

33.

What is the ratio of maximum velocity to average velocity, when the fluid is passing through two parallel plates and flow is laminar?

(a)	3/2
(b)	2/3
(c)	4/3
(d)	3/4

34.

What is the ratio of maximum velocity to average velocity, when the fluid is passing through the pipe and flow is laminar?

(a)	3
(b)	2
(c)	3/2
(d)	2/3

35.

How should be the viscosity of the flowing fluid for laminar flow?

(a)	The viscosity of the fluid should be as low as possible, for laminar flow
(b)	The viscosity of the fluid should be as high as possible, for laminar flow
(c)	Change in viscosity of the flowing fluid does not affect its flow
(d)	Unpredictable

36.

The flow of fluid will be laminar when,

(a)	Reynold's number is less than 2000
(b)	the density of the fluid is low
(c)	both a. and b.
(d)	none of the above

37.

Which among the following is an assumption of the Hagen-Poiseuille equation?

(a)	Fluid is compressible
(b)	Fluid is uniform
(c)	Fluid is laminar
(d)	Fluid is turbulent

38.

During which case will the power loss be maximum?

(a)	High viscosity oil
(b)	Low viscosity oil
(c)	High viscosity water
(d)	Low viscosity water

39.

Angular speed of the shaft is________

(a)	$\frac{2 π N}{1000}$
(b)	$\frac{2 π N}{60}$
(c)	$\frac{2 π}{N}$
(d)	$\frac{2 N}{60}$

40.

The tangential speed of the shaft is______

(a)	$\frac{2 π N}{1000}$
(b)	$\frac{πd N}{1000}$
(c)	$\frac{πd N}{60}$
(d)	$\frac{2 π N}{60}$

Showing 31 to 40 out of 47 Questions