Discussion
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- Question
In flame hardening, oxy-acetylene flame is used.
Options- A. Yes
- B. No
- Correct Answer
- Yes
- 1. The blade velocity coefficient is ratio of relative velocity of steam at outlet tip of the blade to the relative velocity of steam at inlet tip of the blade.
Options- A. True
- B. False Discuss
- 2. The increase in pressure at the outer edge of a drum of radius (r) completely filled up with liquid of density (?) and rotating at (?) rad/s is
Options- A. ? ?2 r2
- B. 2? ?2 r2
- C.
- D.
Discuss
- 3. Lancashire boiler is used where working pressure and power required are
Options- A. low
- B. moderate
- C. high
- D. none of these Discuss
- 4. The Rankine's theory for active earth pressure is based on the assumption that
Options- A. the retained material is homogeneous and cohesionless
- B. the frictional resistance between the retaining wall and the retained material is neglected
- C. the failure of the retained material takes place along a plane called rupture plane
- D. all of the above Discuss
- 5. The seat belt will move out smoothly when pulled out slowly, but it will lock when pulled quickly.
Options- A. Agree
- B. Disagree Discuss
- 6. The diesel engines are also known as __________ engines.
Options- A. compression ignition
- B. spark ignition Discuss
- 7. The expansion of fuel in a four stroke cycle diesel engine
Options- A. starts at 15° before top dead centre and ends at 30° after top dead centre
- B. starts at top dead centre and ends at 30° after top dead centre
- C. starts at 15° after top dead centre and ends at 30° before bottom dead centre
- D. may start and end anywhere Discuss
- 8. The time taken by a particle for one complete oscillation is known as periodic time.
Options- A. Agree
- B. Disagree Discuss
- 9. The velocity through a channel of circular section will be maximum when the depth of water is __________ the diameter of the circular channel.
Options- A. 0.34 times
- B. 0.67 times
- C. 0.81 times
- D. 0.95 times Discuss
- 10. The by-pass factor of a cooling coil decreases with
Options- A. decrease in fin spacing and increase in number of rows
- B. increase in fin spacing and increase in number of rows
- C. increase in fin spacing and decrease in number of rows
- D. decrease in fin spacing and decrease in number of rows Discuss
More questions
Correct Answer: True
Correct Answer:
Correct Answer: moderate
Correct Answer: all of the above
Correct Answer: Agree
Correct Answer: compression ignition
Correct Answer: starts at 15° after top dead centre and ends at 30° before bottom dead centre
Correct Answer: Agree
Correct Answer: 0.81 times
Correct Answer: decrease in fin spacing and increase in number of rows
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