Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev

Topic wise GATE Past Year Papers for Civil Engineering

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Civil Engineering (CE) : Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev

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Question 1. A closed tank contains 0.5 m thick layer of mercury (specific gravity = 13.6) at the bottom. A 2.0 m thick layer of water lies above the mercury layer. A 3.0 m thick layer of oil (specific gravity = 0.6) lies above the water layer. The space above the oil layer contains air under pressure. The gauge pressure at the bottom of the tank is 196.2 kN/m2. The density of water is 1000 kg/m3 and the acceleration due to gravity is 9.81 m/s2. The value of pressure in the air space is    [2018 : 2 Marks, Set-I]
(a) 92.214 kN/m2 
(b) 95.644 kN/m2
(c) 98.922 kN/m2
(d) 99.321 kN/m2 
Answer: 
(a)
Solution:

Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Note: It is a closed chamber, hence concept of absolute pressure cannot be applied.
Calculations have to be done in the form of gauge pressure.

Question 2. The figure shows a U-tube having a 5 mm x 5 mm square cross-section filled with mercury (specific gravity = 13.6) up to a height of 20 cm in each limb (open to the atmosphere).
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
If 5 cm3 of water is added to the right limb, the new height (in cm, up to two decimal places) of mercury in the Left limb will b e __________ .      [2017 : 2 Marks, Set-II]
Solution:
Volume of water added = 5 cm3
Cross-section of U tube
= 5 mm x 5 mm = 0.25 cm2 
Height of water column in U tube
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Now due to conservation of volume, rise in left limb will be equal to fall in right limb.
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
So, the new height (in cm to two decimal place of mercury in the left limb will be)
= 20 + 0.74 = 20.74 cm

Question 3. Group I contains the types of fluids while Group II contains the shear stress-rate of shear relationship of different types of fluids, as shown in the figure
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
The correct match between Group I and Group II is    [2016 : 1 Mark, Set-II]
(a) P-2, Q-4, R-1, S-5
(b) P-2, Q-5, R-4, S-1
(c) P-2, Q-4, R-5, S-3
(d) P-2, Q-1.R-3, S-4
Answer: 
(c)
Solution: 

Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev

Question 4. The dimension for kinematic viscosity is   [2014 : 1 Mark, Set-I]
(a) Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
(b) Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
(c)  Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
(d) Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Answer:
(c)
Solution:
The SI unit of kinematic viscosity is m2/s
∴ Dimension of kinematic viscosity [v]=L2/T.
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev
Fluid Properties and Manometry Civil Engineering (CE) Notes | EduRev

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