In the manometer given above, 2 immiscible fluids mercury (ρ = 13600 kg/m3) and water (ρ = 1000 kg/m3) are used as manometric fluids. The water end is exposed to atmosphere (100 kPa) and the mercury end is exposed to a gas. At this position, the interface between the fluids is at the bottom most point of the manometer. Ignore the width of the manometer tube and the radius of curvature. The value of h is found to be 9.45 m. The height of the mercury column is given to be 75 cm. Find the gauge pressure of the gas. (g = 9.8 m/s2)

and the mercury end is exposed to a gas. At this position, the interface between the fluids is at the bottom most point of the manometer. Ignore the width of the manometer tube and the radius of curvature. The value of h is found to be 9.45 m. The height of the mercury column is given to be 75 cm. Find the gauge pressure of the gas. (g = 9.8 m/s2)a) 100 kPa

Both ends of a U-tube manometer are exposed to the atmosphere. There exists a possibility that the height difference of the manometer is non-zero. True or False?a) Trueb) False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)

False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60b) 50

Trueb) False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60

False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60b) 50

A manometric liquid should suitably have _________

High density & High Vapour pressure

Low density & Low Vapour pressure

Low density & High Vapour pressure

High density & Low Vapour pressure

High density & High Vapour pressure

Which of the following cannot be the value of absolute pressure of a fluid at any point?

‚Äö√Ñ√∂‚àö√ë‚àö¬® 1 bar

In a stationary fluid, how does the local pressure of the fluid vary?

In the horizontal direction only

Both with depth and along horizontal direction

Neither with depth nor along horizontal direction

12 + Mcqs in Manometer in Fluid Mechanics Page 1 McqOptions

1.	In the manometer given above, 2 immiscible fluids mercury (ρ = 13600 kg/m3) and water (ρ = 1000 kg/m3) are used as manometric fluids. The water end is exposed to atmosphere (100 kPa) and the mercury end is exposed to a gas. At this position, the interface between the fluids is at the bottom most point of the manometer. Ignore the width of the manometer tube and the radius of curvature. The value of h is found to be 9.45 m. The height of the mercury column is given to be 75 cm. Find the gauge pressure of the gas. (g = 9.8 m/s2)
A.	and the mercury end is exposed to a gas. At this position, the interface between the fluids is at the bottom most point of the manometer. Ignore the width of the manometer tube and the radius of curvature. The value of h is found to be 9.45 m. The height of the mercury column is given to be 75 cm. Find the gauge pressure of the gas. (g = 9.8 m/s2)a) 100 kPa
B.	50 kPa
C.	200 kPa
D.	0 kPa
Answer» E.

Discussion

2.	Both ends of a U-tube manometer are exposed to the atmosphere. There exists a possibility that the height difference of the manometer is non-zero. True or False?a) Trueb) False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)
A.	Trueb) False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60
B.	False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60b) 50
C.	75
D.	25View Answer
Answer» B. False 9.The below figure shows an inclined U-tube mercury manometer. The vertical end of the tube is exposed to a gas of gauge pressure 50 kPa and the inclined end is exposed to the atmosphere. The inclined part of the tube is at an angle of 30o with the horizontal. Find the value of h (in cm) (take g = 9.8 m/s2, ρmercury = 13600 kg/m3)a) 60b) 50

Discussion

3.	In a U-tube mercury manometer, one end is exposed to the atmosphere and the other end is connected to a pressurized gas. The gauge pressure of the gas is found to be 40 kPa. Now, we change the manometric fluid to water. The height difference changes by: (ρmercury = 13600 kg/m3, ρwater = 1000 kg/m3).
A.	1260%
B.	92.64 %
C.	Remains unchanged (0%)
D.	13.6%
Answer» B. 92.64 %

Discussion

4.	In a U-tube manometer, one end is open to the atmosphere, the other end attached to a pressurized gas of gauge pressure 40 kPa. The height of the fluid column in the atmospheric side is 60 cm, and that on the gas side is 30 cm. The manometic fluid used is: (Take g = 9.8 m/s2).
A.	Water
B.	Liquid ammonia
C.	Oil
D.	Mercury
Answer» E.

Discussion

5.	Both ends of a U-tube manometer are exposed to the atmosphere. There exists a possibility that the height difference of the manometer is non-zero. True or False?
A.	True
B.	False
Answer» B. False

Discussion

6.	A simple U-tube manometer can measure negative gauge pressures.
A.	True
B.	False
Answer» B. False

Discussion

7.	A manometric liquid should suitably have _________
A.	Low density & Low Vapour pressure
B.	Low density & High Vapour pressure
C.	High density & Low Vapour pressure
D.	High density & High Vapour pressure
Answer» D. High density & High Vapour pressure

Discussion

8.	In a U-tube mercury manometer, one end is exposed to the atmosphere and the other end is connected to a pressurized gas. The gauge pressure of the gas is found to be 40 kPa. Now, we change the manometric fluid to water. The height difference changes by: (‚âà√¨‚àö√ñmercury = 13600 kg/m³, ‚âà√¨‚àö√ñwater = 1000 kg/m³).$
A.	1260%
B.	92.64 %
C.	Remains unchanged (0%)
D.	13.6%
Answer» B. 92.64 %

Discussion

9.	In a U-tube manometer, one end is open to the atmosphere, the other end attached to a pressurized gas of gauge pressure 40 kPa. The height of the fluid column in the atmospheric side is 60 cm, and that on the gas side is 30 cm. The manometic fluid used is: (Take g = 9.8 m/s²).
A.	Water
B.	Liquid ammonia
C.	Oil
D.	Mercury
Answer» E.

Discussion

10.	A student wants to find the absolute pressure of water at a point below the surface of water. He has a barometer and a manometer pressure gauge. The barometer reads 1.3152 bar where as the manometer pressure gauge reads 0.3152 bar. What is the absolute pressure? (Assume that pressure at one end of the manometer is atmospheric.)
A.	1 bar
B.	1.6304 bar
C.	0.3152 bar
D.	1.3152 bar
Answer» C. 0.3152 bar

Discussion

11.	Which of the following cannot be the value of absolute pressure of a fluid at any point?
A.	0
B.	1.013 bar
C.	‚Äö√Ñ√∂‚àö√ë‚àö¬® 1 bar
D.	200 bar
Answer» D. 200 bar

Discussion

12.	In a stationary fluid, how does the local pressure of the fluid vary?
A.	With depth only
B.	In the horizontal direction only
C.	Both with depth and along horizontal direction
D.	Neither with depth nor along horizontal direction
Answer» B. In the horizontal direction only

Discussion

Explore topic-wise MCQs in Fluid Mechanics.

In a U-tube manometer, one end is open to the atmosphere, the other end attached to a pressurized gas of gauge pressure 40 kPa. The height of the fluid column in the atmospheric side is 60 cm, and that on the gas side is 30 cm. The manometic fluid used is: (Take g = 9.8 m/s2).

Both ends of a U-tube manometer are exposed to the atmosphere. There exists a possibility that the height difference of the manometer is non-zero. True or False?

A simple U-tube manometer can measure negative gauge pressures.

A manometric liquid should suitably have _________

In a U-tube manometer, one end is open to the atmosphere, the other end attached to a pressurized gas of gauge pressure 40 kPa. The height of the fluid column in the atmospheric side is 60 cm, and that on the gas side is 30 cm. The manometic fluid used is: (Take g = 9.8 m/s2).

Which of the following cannot be the value of absolute pressure of a fluid at any point?

In a stationary fluid, how does the local pressure of the fluid vary?

In a U-tube manometer, one end is open to the atmosphere, the other end attached to a pressurized gas of gauge pressure 40 kPa. The height of the fluid column in the atmospheric side is 60 cm, and that on the gas side is 30 cm. The manometic fluid used is: (Take g = 9.8 m/s²).