7.What is the variation observed in temperature in atmosphere with respect to elevation?

It goes on decreasing with height

It goes on increasing with height

It first increases then decreases

It first decreases then increases

Why can t the density be assumed as constant for compressible fluids?

It remains constant with temperature and pressure

It shows variation with temperature and pressure

It remains constant with temperature and pressure

It becomes almost constant at very high temperature

Explore topic-wise MCQs in Fluid Mechanics.

This section includes 7 Mcqs, each offering curated multiple-choice questions to sharpen your Fluid Mechanics knowledge and support exam preparation. Choose a topic below to get started.

1.	A simple U tube manometer connected to a pipe in which liquid is flowing with uniform speed will give which kind of pressure?
A.	Absolute Pressure
B.	Vacuum Pressure
C.	Gauge Pressure
D.	None of the mentioned
Answer» D. None of the mentioned

Discussion

2.	For dynamic fluid motion in a pipe, the pressure measurement cannot be carried out accurately by manometer.
A.	True
B.	False
Answer» B. False

Discussion

3.	As we go upwards, at height there is slight decrease in pressure variation.
A.	True
B.	False
Answer» B. False

Discussion

4.	7.What is the variation observed in temperature in atmosphere with respect to elevation?
A.	It goes on decreasing with height
B.	It goes on increasing with height
C.	It first increases then decreases
D.	It first decreases then increases
Answer» E.

Discussion

5.	Why can t the density be assumed as constant for compressible fluids?
A.	It shows variation with temperature and pressure
B.	It remains constant with temperature and pressure
C.	It becomes almost constant at very high temperature
D.	None of the mentioned
Answer» B. It remains constant with temperature and pressure

Discussion

6.	Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm² and 25 respectively. The temperature lapse rate is given as 0.0065 /m. Take density of air at sea level equal to 1.2 kg/m³.
A.	19.7 N/cm<sup>2</sup>
B.	9.85 N/cm<sup>2</sup>
C.	4.93 N/cm<sup>2</sup>
D.	6.24 N/cm<sup>2</sup>
Answer» C. 4.93 N/cm<sup>2</sup>

Discussion

7.	Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm2 and temperature is 25 assuming air is incompressible. Take density of air as 1.2 kg/m3. Neglect variation of g.
A.	4.98 N/cm<sup>2</sup>
B.	2.49 N/cm<sup>2</sup>
C.	1.24 N/cm<sup>2</sup>
D.	None of the mentioned
Answer» C. 1.24 N/cm<sup>2</sup>

Discussion

Explore topic-wise MCQs in Fluid Mechanics.

A simple U tube manometer connected to a pipe in which liquid is flowing with uniform speed will give which kind of pressure?

For dynamic fluid motion in a pipe, the pressure measurement cannot be carried out accurately by manometer.

As we go upwards, at height there is slight decrease in pressure variation.

7.What is the variation observed in temperature in atmosphere with respect to elevation?

Why can t the density be assumed as constant for compressible fluids?

Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm2 and 25 respectively. The temperature lapse rate is given as 0.0065 /m. Take density of air at sea level equal to 1.2 kg/m3.

Calculate the pressure at a height of 6500m above the sea level if the atmospheric pressure is 10.145 N/cm2 and temperature is 25 assuming air is incompressible. Take density of air as 1.2 kg/m3. Neglect variation of g.

Calculate the pressure of air at a height of 3500m from sea level where pressure and temperature of air are 10 N/cm² and 25 respectively. The temperature lapse rate is given as 0.0065 /m. Take density of air at sea level equal to 1.2 kg/m³.