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Mechanical Engineering
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Hydraulics and Fluid Mechanics
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Question
The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
Options
A.
B.
C.
D.
Correct Answer
Hydraulics and Fluid Mechanics problems
Search Results
1. A fluid whose viscosity does not change with the rate of deformation or shear strain is known as
Options
A. real fluid
B. ideal fluid
C. newtonian fluid
D. non-newtonian fluid
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Correct Answer: newtonian fluid
2. A submerged body is said to be in a stable equilibrium, if its centre of gravity __________ the centre of buoyancy.
Options
A. coincides with
B. lies below
C. lies above
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Correct Answer: lies below
3. If the depth of water in an open channel is greater than the critical depth, the flow is called
Options
A. critical flow
B. turbulent flow
C. tranquil flow
D. torrential flow
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Correct Answer: tranquil flow
4. The pressure of a liquid measured with the help of a piezometer tube is
Options
A. vacuum pressure
B. gauge pressure
C. absolute pressure
D. atmospheric pressure
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Correct Answer: gauge pressure
5. The ratio of the inertia force to the viscous force is called
Options
A. Reynold's number
B. Froude's number
C. Weber's number
D. Euler's number
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Correct Answer: Reynold's number
6. The total pressure on an immersed surface inclined at an angle ? with the liquid surface is
Options
A.
wA
B.
w
x
C.
wA
x
D.
wA
x
/sin ?
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Correct Answer:
wA
x
7. The flow in a pipe or channel is said to be non-uniform when
Options
A. the liquid particles at all sections have the same velocities
B. the liquid particles at different sections have different velocities
C. the quantity of liquid flowing per second is constant
D. each liquid particle has a definite path
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Correct Answer: the liquid particles at different sections have different velocities
8. A venturiflume is used to measure
Options
A. pressure of liquid
B. discharge of liquid
C. pressure difference between two points in a channel
D. pressure difference between two points in a pipe
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Correct Answer: discharge of liquid
9. The pressure measured with the help of a pressure gauge is called
Options
A. atmospheric pressure
B. gauge pressure
C. absolute pressure
D. mean pressure
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Correct Answer: gauge pressure
10. The velocity at which the flow changes from laminar flow to turbulent flow is called
Options
A. critical velocity
B. velocity of approach
C. sub-sonic velocity
D. super-sonic velocity
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Correct Answer: critical velocity
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