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Mechanical Engineering
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Hydraulics and Fluid Mechanics
Comments
Question
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
Correct Answer
gauge pressure
Hydraulics and Fluid Mechanics problems
Search Results
1. 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
Show Answer
Scratch Pad
Discuss
Correct Answer: discharge of liquid
2. 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
Show Answer
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Discuss
Correct Answer: the liquid particles at different sections have different velocities
3. 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 ?
Show Answer
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Discuss
Correct Answer:
wA
x
4. The power absorbed (in watts) in overcoming the viscous resistance of a footstep bearing is
Options
A.
B.
C.
D.
Show Answer
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Discuss
Correct Answer:
5. 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
Show Answer
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Discuss
Correct Answer: newtonian fluid
6. 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
Show Answer
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Discuss
Correct Answer: critical velocity
7. A flow is called hyper-sonic, if the Mach number is
Options
A. less than unity
B. unity
C. between 1 and 6
D. none of these
Show Answer
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Discuss
Correct Answer: none of these
8. Reynold's number is the ratio of the inertia force to the
Options
A. surface tension force
B. viscous force
C. gravity force
D. elastic force
Show Answer
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Discuss
Correct Answer: viscous force
9. A jet of water discharging from a 40 mm diameter orifice has a diameter of 32 mm at its vena contracta. The coefficient of contraction is
Options
A. 0.46
B. 0.64
C. 0.78
D. 0.87
Show Answer
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Discuss
Correct Answer: 0.64
10. The pressure intensity in kN/m
2
(or kPa) at any point in a liquid is (where
w
= Specific weight of liquid, and
h
= Depth of liquid from the surface)
Options
A.
w
B.
wh
C.
w
/
h
D.
h
/
w
Show Answer
Scratch Pad
Discuss
Correct Answer:
wh
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