Absolute , Gauge , Atmospheric and and Vacuum Pressure

Q. The standard atmospheric pressure is 101.32 kPa. The local atmospheric pressure is 91.52 kPa. If a pressure at a flow path is recorded at 22.48 kPa(gauge), it is equivalent to

1. 69.04 kPa (abs)
2. 88.4 kPa (abs)
3. 114.0 kPa (abs)
4. 123.0 kPa (abs)

Q. In given figure, if the pressure of gas in bulb A is 50 cm Hg vacuum and ${\rho }_{atm}$=76 cm Hg, then height of column H is equal to

1. 26 cm
2. 50 cm
3. 76 cm
4. 126 cm

Q.

1 ATM equals To _____.

Q. At a certain point, the absolute pressure and atmospheric pressure is given by 850 mm of Hg and 700 mm of Hg respectively. What is the value of gauge pressure (mm of Hg) at that point ?

1. 50
2. 100
3. 150
4. 200

Q. A pressure gauge reads 57.4 kPa and 80 kPa, respectively at heights of 8 m and 5 m fitted on the side of a tank filled with liquid. What is the approximate density of the liquid in kg/$m^3$?

1. 393
2. 768
3. 1179
4. 7530

Q. A rectangular pontoon has a width of 6 m, a length of 12 m, and a draught of 1.5 m in fresh water (density = 1000 kg/$m^3$). Its draught in sea water having density of 1025 kg/$m^3$ is

1. 1.04 m
2. 1.24 m
3. 1.46 m
4. 1.50 m

Q. Which one of the following pressure units represents the LEAST pressure ?

1. millibar
2. mm of Hg
3. N/m$m^2$
4. kgf/c$m^2$

Q.

How do you convert 100 mm Hg to Pa?

Q. A centrifugal pump delivers a manometric head of 12 m when pumping a liquid of relative density 0.8. If all other factors remain the same but the liquid has a relative density of 1.2, the new manometric head would be :

1. 8 m
2. 10 m
3. 12 m
4. 18 m

Q. In the below figure the pressure gauge will record a gauge pressure equivalent to

1. 6.12 m of water
2. 1.21 m of mercury
3. 0.5 bar
4. 34, 000 Pa

Q. A pressure gauge fitted on the side of a tank filled with liquid reads 50 kPa and 100 kPa at heights of 10 m and 5 m. What is the approximate density of the liquid $\left(inkg/m^3\right)$ ? (take g = 10 $inkN/m^2)$

1. 10
2. 5000
3. 1000
4. 100

Q.

The unit torr is related to barometric height as

Q.

How do you convert $520mmHg$ to Pa?

Q. The weight density of fluid in a container varies with depth as given under $\gamma =0.2h^2+0.1h+8.2$, where h is in m and $\gamma$ is in $kN/m^3$.
The pressure (gauge in kPa) at a depth 15m will be :

1. $359.25$
2. $423.2$
3. $461.3$
4. $820.5$

Q.

The unit(s) of atmospheric pressure is(are)

Q.

A simple barometer reads 75 cm mercury. A drop of alcohol is introduced into it, which raises the mercury column. The new barometric height will be:

1. 75 cm

2. Less than 75 cm

3. More than 75 cm

4. None of the above

Q. A vessel is filled with a liquid of relative density (R.D) = 1.25 as shown

B is 80 cm below and 50 cm to the left of point A. What will be the pressure difference (in kPa) between the two points A and B

1. 12.5
2. 8
3. 125
4. 10