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- Question
In a vibrating system, if the actual damping coefficient is 40 N/m/s and critical damping coefficient is 420 N/m/s, then logarithmic decrement is equal to
Options- A. 0.2
- B. 0.4
- C. 0.6
- D. 0.8
- Correct Answer
- 0.6
- 1. Hot piercing is extensively used for making bolts and nuts.
Options- A. Yes
- B. No Discuss
- 2. A Francis turbine is an outward flow reaction turbine.
Options- A. True
- B. False Discuss
- 3. The negative acceleration is called retardation.
Options- A. True
- B. False Discuss
- 4. 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
- 5. An alloy of copper, tin and zinc is known as
Options- A. brass
- B. bronze
- C. gun metal
- D. muntz metal Discuss
- 6. 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
- 7. The pressure of steam at throat of a steam nozzle is called critical pressure.
Options- A. Agree
- B. Disagree Discuss
- 8. Which part of the automobile tyre is subjected to greatest flexing action?
Options- A. Bead
- B. Side wall
- C. Shoulder
- D. Tread Discuss
- 9. Tension in the cable supporting a lift is more when the lift is moving __________ with an acceleration.
Options- A. upwards
- B. downwards Discuss
- 10. Parson's reaction turbine is a __________ reaction turbine.
Options- A. 40 percent
- B. 50 percent
- C. 60 percent
- D. 70 percent Discuss
More questions
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
Correct Answer: Side wall
Correct Answer: upwards
Correct Answer: 50 percent
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