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# Test: Fluid Mechanics Level - 3

## 25 Questions MCQ Test Civil Engineering SSC JE (Technical) | Test: Fluid Mechanics Level - 3

Description
This mock test of Test: Fluid Mechanics Level - 3 for Civil Engineering (CE) helps you for every Civil Engineering (CE) entrance exam. This contains 25 Multiple Choice Questions for Civil Engineering (CE) Test: Fluid Mechanics Level - 3 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Fluid Mechanics Level - 3 quiz give you a good mix of easy questions and tough questions. Civil Engineering (CE) students definitely take this Test: Fluid Mechanics Level - 3 exercise for a better result in the exam. You can find other Test: Fluid Mechanics Level - 3 extra questions, long questions & short questions for Civil Engineering (CE) on EduRev as well by searching above.
QUESTION: 1

### If cohesion between molecules of a fluid is greater than adhesion between fluid and glass, then the free level of fluid in a dipped glass tube will be

Solution: QUESTION: 2

Solution:
QUESTION: 3

### The line of action of the buoyant force acts through the centroid of the

Solution:
QUESTION: 4

The time oscillation of a floating body with increase in metacentric height will be

Solution:
QUESTION: 5

The velocity at the exit of the pipe as shown in the below figure will be Solution:
QUESTION: 6

The following terms relate to floating bodies :
Centre of gravity .....G
Meta Centre .....M
Weight of floating body.....W
Buoyant force ......FB
Match List I with List II and select these correct answer Solution:
QUESTION: 7

Match List I with List II and select the correct answer. Solution:

QUESTION: 8

Match List I with List II and select the correct answer: Solution:
QUESTION: 9

Match List I (fluid properties) with List II (related terms) and select the correct answer Solution:
QUESTION: 10

Match List I with List II and select the correct answer. Solution:
QUESTION: 11

Newton's law of viscosity for a fluid states that the shear stress is

Solution:
QUESTION: 12

The General relationship between shear stress (ζ) and velocity Gradient  ( du/dy ) for a fluid can
be written as

ζ = A  ( du/dy )+ B
If n < 1, B = 0
Then the fluid known as

Solution:
QUESTION: 13

If angle of contact of a drop of liquid is acute than

Solution:
QUESTION: 14

Match List I (Physical properties of fluid) with List II (Dimensions/definitions) and select the correct answer using the codes given below the lists. Solution:
QUESTION: 15

An increase in pressure of 2 bars decreases the volume of a liquid by 0.01 per cent. The bulk modulus of elasticity of the liquid is

Solution:
QUESTION: 16

The pressure inside a soap bubble of 50 mm diameter is 25 N/m2 above the atmospheric pressure. What is the surface tension is soap film

Solution: QUESTION: 17

Bourdon gauge measures

Solution:
QUESTION: 18

When can a piezometer be not used for pressure measurement in pipes

Solution:
QUESTION: 19

What is the difference in pressure head, measured by a mercury-oil differential manometer for a 20 cm difference of mercury level?  (Sp. gravity of oil = 0.8)

Solution:

Difference in pressure head in m of oil (i.e. lighter liquid) QUESTION: 20

In order to increase sensitivity of U-tube manometer, one leg is usually inclined by angle θ, sensitivity of inclined tube to sensitivity of U-tube equal to

Solution:
QUESTION: 21

In figure if the pressure of gas in bulb A is 50 cm Hg vacuum and Patm = 76 cm Hg, the height of column H is equal to Solution: QUESTION: 22

A U-tube manometer is used to measure the pressure in an oil pipe A as shown in the figure.The specific gravity of the oil is 0.8 and that of mercury is 13.6. The equivalent gauge pressure is nearly. Solution: QUESTION: 23

A multi-tube manometer filled with water up to level A, B and C as shown in the figure is rotated about the vertical axis at A. The water levels at A, B and C will all lie on Solution:
QUESTION: 24 A U-tube manometer shown attached to an air pipe reads a height of 20 cm of mercury as shown. What is the pressure in kPa in the air pipe ?

Solution: QUESTION: 25

A metal block is thrown into deep lake. As it sinks deeper in water, the buoyant force acting on it

Solution:

Objects weigh more in air than in water. When the stone sinks, the weight of the stone appears to weigh less. The missing weight is equal to the weight of the water displaced. This weight is equal to the buoyant force.
That is, Loss in weight of body = Weight of water (liquid) displaced by the body = Buoyant force or upthrust exerted by water (any liquid) on the body.
Once the stone is fully submerged, the buoyant force will remain unchanged because the volume of water that it displaces will remain unchanged.