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- Question
A composite slab has two layers of different materials with thermal conductivities k1 and k2. If each layer has the same thickness, then the equivalent thermal conductivity of the slab will be
Options- A. k1 k2
- B. k1 + k2
- C.
- D.
- Correct Answer
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- 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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