Discussion
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- 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. The critical pressure ratio for initially dry saturated steam is
Options- A. 0.546
- B. 0.577
- C. 0.582
- D. 0.601 Discuss
- 2. Hydrogen is the __________ substance.
Options- A. lightest
- B. heaviest Discuss
- 3. Cemented carbide tools are generally poor in shear.
Options- A. Yes
- B. No Discuss
- 4. Hot piercing is extensively used for making bolts and nuts.
Options- A. Yes
- B. No Discuss
- 5. A Francis turbine is an outward flow reaction turbine.
Options- A. True
- B. False Discuss
- 6. The negative acceleration is called retardation.
Options- A. True
- B. False Discuss
- 7. When the spring of a watch is wound, it will possess
Options- A. strain energy
- B. kinetic energy
- C. heat energy
- D. electrical energy Discuss
- 8. An alloy of copper, tin and zinc is known as
Options- A. brass
- B. bronze
- C. gun metal
- D. muntz metal Discuss
- 9. In electro-chemical machining, the gap between the tool and work is kept as
Options- A. 0.1 mm
- B. 0.25 mm
- C. 0.4 mm
- D. 0.75 mm Discuss
- 10. The pressure of steam at throat of a steam nozzle is called critical pressure.
Options- A. Agree
- B. Disagree Discuss
More questions
Correct Answer: 0.577
Correct Answer: lightest
Correct Answer: Yes
Correct Answer: No
Correct Answer: False
Correct Answer: True
Correct Answer: strain energy
Correct Answer: gun metal
Correct Answer: 0.75 mm
Correct Answer: Agree
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