Discussion
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- Question
For a two stage reciprocating compressor, compression from p1 to p3 is with perfect intercooling and no pressure losses. If compression in both the cylinders follows the same polytropic process and the atmospheric pressure is pa, then the intermediate pressure p2 is given by
Options- A. p2 = (p1 + p3)/2
- B. p2 = p1.p3
- C. P2 = Pa x p3/p1
- D. p2 = pa p3/p1
- Correct Answer
- p2 = p1.p3
- 1. The cold working of metals is carried out
Options- A. at the recrystallisation temperature
- B. below the recrystallisation temperature
- C. above the recrystallisation temperature
- D. at any temperature Discuss
- 2. Chromium when added to steel __________ the tensile strength.
Options- A. does not effect
- B. decreases
- C. increases Discuss
- 3. The electron beam welding can be carried out in
Options- A. open air
- B. a shielded gas environment
- C. vacuum
- D. a pressurised inert gas chamber Discuss
- 4. In a pressure enthalpy chart, the space between the saturated liquid line and saturated vapour line, represents sub-cooled liquid region.
Options- A. True
- B. False Discuss
- 5. Otto cycle is also known as
Options- A. constant pressure cycle
- B. constant volume cycle
- C. constant temperature cycle
- D. constant temperature and pressure cycle Discuss
- 6. If the resultant of a number of forces acting on a body is zero, then the body will not be in equilibrium.
Options- A. Yes
- B. No Discuss
- 7. The operation of cutting of a flat sheet to the desired shape is called
Options- A. shearing
- B. piercing
- C. punching
- D. blanking Discuss
- 8. When shear force at a point is zero, then bending moment is __________ at that point.
Options- A. zero
- B. minimum
- C. maximum
- D. infinity Discuss
- 9. When a body is subjected to a direct tensile stress (?) in one plane, then normal stress on an oblique section of the body inclined at an angle ? to the normal of the section is
Options- A. ? cos ?
- B. ? cos2 ?
- C. ? sin ?
- D. ? sin2 ? Discuss
- 10. The brake power is the power available
Options- A. in the engine cylinder
- B. at the crank shaft
- C. at the crank pin
- D. none of these Discuss
More questions
Correct Answer: below the recrystallisation temperature
Correct Answer: increases
Correct Answer: vacuum
Correct Answer: False
Correct Answer: constant volume cycle
Correct Answer: No
Correct Answer: shearing
Correct Answer: maximum
Correct Answer: ? cos2 ?
Correct Answer: at the crank shaft
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