Discussion
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- Question
A thick cylindrical shell having ro and ri as outer and inner radii, is subjected to an internal pressure (p). The maximum tangential stress at the inner surface of the shell is
Options- A.
- B.
- C.
- D.
- Correct Answer
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- 1. The hardness and tensile strength in austenitic stainless steel can be increased by
Options- A. hardening and cold working
- B. normalising
- C. martempering
- D. full annealing Discuss
- 2. When a gear box has four forward speeds and one reverse speed, it is said to be a
Options- A. 3-speed gear box
- B. 4-speed gear box
- C. 5-speed gear box
- D. 6-speed gear box Discuss
- 3. The metacentric heights of two floating bodies A and B are 1 m and 1.5 m respectively. Select the correct statement.
Options- A. The bodies A and B have equal stability
- B. The body A is more stable than body B
- C. The body B is more stable than body A
- D. The bodies A and B are unstable Discuss
- 4. Which of the following refrigerant has the lowest freezing point?
Options- A. R-11
- B. R-12
- C. R-22
- D. Ammonia Discuss
- 5. The pressure measured with the help of a piezometer tube is in
Options- A. N/mm2
- B. N/m2
- C. head of liquid
- D. all of these Discuss
- 6. The width of cutting edge of a parting-off tool varies from
Options- A. 3 to 12 mm
- B. 5 to 20 mm
- C. 8 to 30 mm
- D. 15 to 40 mm Discuss
- 7. Cast iron is manufactured in
Options- A. blast furnace
- B. cupola
- C. open hearth furnace
- D. bessemer converter Discuss
- 8. For the same maximum pressure and heat input, the exhaust temperature of petrol engine is __________ than that of diesel engine.
Options- A. less
- B. more Discuss
- 9. The workdone on a compressor will be minimum if air is taken from
Options- A. the atmosphere
- B. a source at 0° C
- C. a source of low temperature air
- D. a source of high temperature air Discuss
- 10. A diamond pointed chisel is used for cutting
Options- A. flat surfaces
- B. grooves
- C. keyways
- D. V-shaped grooves Discuss
More questions
Correct Answer: hardening and cold working
Correct Answer: 4-speed gear box
Correct Answer: The body B is more stable than body A
Correct Answer: R-22
Correct Answer: head of liquid
Correct Answer: 3 to 12 mm
Correct Answer: cupola
Correct Answer: more
Correct Answer: a source of low temperature air
Correct Answer: V-shaped grooves
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