Chemical Engineering

Measurement of Pressure

Question 1
Marks : +2 | -2
Pass Ratio : 100%
What is the pressure difference of the ends of a U-tube manometer filled with liquid (density = 10 kg/m3) the difference in the height of the liquid in the tubes is 5 cm?
5 N/m2
10 N/m2
15 N/m2
20 N/m2
Explanation:
Pressure difference = dgh = 10*10*0.05 = 5 N/m2.
Question 2
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Pass Ratio : 100%
Which of the following is not a pressure measuring device?
Manometer
Barometer
Galvanometer
None of the mentioned
Explanation:
Galvanometer is used to measure current.
Question 3
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An open tank 10 m deep is completely filled with a liquid of density 5 kg/m3, what is the pressure difference at the top and bottom?
100 N/m2
250 N/m2
500 N/m2
1000 N/m2
Explanation:
Pressure difference = dgh = 5*10*10 = 500 N/m2.
Question 4
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Pass Ratio : 100%
What is the pressure if 10 N of force acts at 60 degrees from the normal of a 5 m2 surface?
0.5 Pa
1 Pa
2 Pa
4 Pa
Explanation:
Normal component of the force = 10cos60o = 10*0.5 = 5 N, => Pressure = 5/5 = 1 Pa.
Question 5
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Pass Ratio : 100%
What is the pressure of 1 mole of an ideal gas at 27oC occupying 1 Liter of volume?
12.31 atm
24.63 atm
36.95 atm
48.94 atm
Explanation:
For ideal gas PV = nRT, => P = 1*0.0821*300/1 = 24.63 atm.
Question 6
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Bernoulli’s Equation is the conservation of?
Energy
Momentum
Pressure
Mass
Explanation:
Bernoulli’s equation is modified form of conservation of energy equation.
Question 7
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What is the pressure if 10 N of force acts at 30 degrees from the surface of area 5 m2?
1 Pa
2 Pa
5 Pa
10 Pa
Explanation:
Normal component of the force = 10sin30o = 10*0.5 = 5 N, => Pressure = 5/5 = 1 Pa.
Question 8
Marks : +2 | -2
Pass Ratio : 100%
10 mm of water (density = 1000 kg/m3) and 5 mm of a liquid has the same pressure drop, what is the density of liquid?
500 kg/m3
1000 kg/m3
1500 kg/m3
2000 kg/m3
Explanation:
pressure of water = pressure of liquid, => d1h1 = d2h2, => 10*1000 = 5*d2, => d
Question 9
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Pass Ratio : 100%
What is the pressure if 10 N of force is acting normally on 5 m2 surface area?
2 Pa
4 Pa
8 Pa
10 Pa
Explanation:
Pressure = 10/5 = 2Pa.
Question 10
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Pass Ratio : 100%
A hydraulic lever has input surface area 2 m2, and output surface area 10 m2, if the input force is 5 N, then what is the output force?
1 N
2 N
5 N
10 N
Explanation:
Hydraulic lever works on the Pascal’s principle, => F1A1 = F2A2, => 5*2 = F2*10, => F2 = 1 N.