Discussion
Home ‣ Mechanical Engineering ‣ Hydraulics and Fluid Mechanics See What Others Are Saying!
- Question
In an external mouthpiece, the absolute pressure head at vena contracta is __________ the atmospheric pressure head by an amount equal to 0.89 times the height of the liquid, above the vena contracta.
Options- A. less than
- B. more than
- Correct Answer
- less than
- 1. Seam weiding is a
Options- A. continuous spot welding process
- B. multi-spot welding process
- C. arc welding process
- D. process used for joining round bars Discuss
- 2. The tool material, for faster machining, should have
Options- A. wear resistance
- B. red hardness
- C. toughness
- D. all of these Discuss
- 3. The function of a carburettor is to control the amount and ratio of air-fuel mixture.
Options- A. True
- B. False Discuss
- 4. The ratio of static friction to dynamic friction is always
Options- A. equal to one
- B. less than one
- C. greater than one
- D. none of these Discuss
- 5. The most economical section of a trapezoidal channel is one which has hydraulic mean depth equal to
Options- A. 1/2 depth
- B. 1/2 breadth
- C. 1/2 sloping side
- D. 1/4 (depth + breadth) Discuss
- 6. The line of action of the force of buoyancy acts through the centre of gravity of the volume of the liquid displaced.
Options- A. True
- B. False Discuss
- 7. The internal flue tubes of a Lancashire boiler are reduced in diameter at the back to provide access to the lower part of the boiler.
Options- A. True
- B. False Discuss
- 8. If the speed of the engine is increased, the indicated power will
Options- A. increase
- B. decrease
- C. remain same Discuss
- 9. The compression ratio for petrol engines is
Options- A. 3 to 6
- B. 5 to 8
- C. 15 to 20
- D. 20 to 30 Discuss
- 10. The entropy of water at 0°C is assumed to be
Options- A. 1
- B. 0
- C. -1
- D. 10 Discuss
More questions
Correct Answer: continuous spot welding process
Correct Answer: all of these
Correct Answer: True
Correct Answer: greater than one
Correct Answer: 1/2 depth
Correct Answer: True
Correct Answer: True
Correct Answer: increase
Correct Answer: 5 to 8
Correct Answer: 0
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