Discussion
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- Question
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
- Correct Answer
- 0.64
- 1. 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 Discuss
- 2. 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 Discuss
- 3. 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 Discuss
- 4. 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 Discuss
- 5. 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 Discuss
- 6. The pressure intensity in kN/m2 (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 Discuss
- 7. The discharge over a rectangular notch is
Options- A. inversely proportional to H3/2
- B. directly proportional to H3/2
- C. inversely proportional to H5/2
- D. directly proportional to H5/2 Discuss
- 8. A glass tube of small diameter (d) is dipped in fluid. The height of rise or fall in the tube given by (where w = Specific weight of liquid, ? = Angle of contact of the liquid surface, and ? = Surface tension)
Options- A.
- B.
- C.
- D.
Discuss
- 9. The vacuum pressure can be measured with the help of a piezometer tube.
Options- A. True
- B. False Discuss
- 10. According to Bazin, the coefficient of discharge varies with the height of water over the sill of a weir.
Options- A. Correct
- B. Incorrect Discuss
Hydraulics and Fluid Mechanics problems
Search Results
Correct Answer: viscous force
Correct Answer: none of these
Correct Answer: critical velocity
Correct Answer: gauge pressure
Correct Answer: discharge of liquid
Correct Answer: wh
Correct Answer: directly proportional to H3/2
Correct Answer:
Correct Answer: False
Correct Answer: Correct
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