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- Question
The heat absorbed or rejected by the working substance is given by (where ds = Increase or decrease of entropy, T = Absolute temperature, and dQ = Heat absorbed or rejected)
Options- A. ?Q = T.ds
- B. ?Q = T/ds
- C. dQ = ds/T
- D. none of these
- Correct Answer
- ?Q = T.ds
- 1. When the end contractions of the weir are suppressed, then number of end contractions (n) are taken as zero
Options- A. Agree
- B. Disagree Discuss
- 2. Halsey plan of wage incentive
Options- A. is not applied to all level of workers
- B. is applied to all level of workers
- C. does not guarantee minimum wage
- D. is based upon efficiency of worker Discuss
- 3. A furnace is made of a red brick wall of thickness 0.5 m and conductivity 0.7 W/mK. For the same heat loss and temperature drop, this can be replaced by a layer of diatomite earth of conductivity 0.14 W/mK and thickness
Options- A. 0.5 m
- B. 0.1 m
- C. 0.2 m
- D. 0.5 m Discuss
- 4. The specific speed from 160 to 500 r.p.m. of a centrifugal pump indicates that the pump is
Options- A. slow speed with radial flow at outlet
- B. medium speed with radial flow at outlet
- C. high speed with radial flow at outlet
- D. high speed with axial flow at outlet Discuss
- 5. A double acting steam engine with a cylinder diameter of 190 mm and a stroke of 300 mm has a cut-off of 0.35. The expansion ratio for this engine is nearly
Options- A. 1.05
- B. 2.86
- C. 6.65
- D. 10.05 Discuss
- 6. Nuclear reactors are used
Options- A. to produce heat for thermoelectric power
- B. to produce fissionable material
- C. to propel ships, submarines, aircrafts
- D. all of these Discuss
- 7. In a closed cycle gas turbine, the air is compressed
Options- A. isothermally
- B. polytropically
- C. isentropically
- D. none of these Discuss
- 8. The cylindrical shell of a Lancashire boiler has diameter from
Options- A. 1 to 2 m
- B. 1.25 to 2.25 m
- C. 1.5 to 2.5 m
- D. 1.75 to 2.75 m Discuss
- 9. Energy can neither be created nor destroyed, but it can be transformed from one form to another. This statement is known as
Options- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. Kinetic theory of gases Discuss
- 10. In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the atmospheric pressure.
Options- A. equal to
- B. lower than
- C. higher than Discuss
More questions
Correct Answer: Agree
Correct Answer: is applied to all level of workers
Correct Answer: 0.1 m
Correct Answer: high speed with axial flow at outlet
Correct Answer: 2.86
Correct Answer: all of these
Correct Answer: isentropically
Correct Answer: 1.75 to 2.75 m
Correct Answer: First law of thermodynamics
Correct Answer: higher than
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