Discussion
Home ‣ Mechanical Engineering ‣ Heat Transfer, Refrigeration and Air Conditioning See What Others Are Saying!
- Question
The process of heat transfer from one particle of the fluid to another by the actual movement of the fluid particles caused by some mechanical means, is known as
Options- A. conduction
- B. free convection
- C. forced convection
- D. radiation
- Correct Answer
- forced convection
- 1. The function of an oil control orifice is that it
Options- A. returns cylinder head lubricating oil to the oil pan at high speed
- B. turns oil into fine mist for spray lubrication
- C. regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
- D. removes impurities from cylinder head lubricating oil Discuss
- 2. The missing quantity per stroke is equal to
Options- A. cylinder feed - indicated mass of steam
- B. cylinder feed + indicated mass of steam
- C. mass of cushion steam + indicated mass of steam
- D. mass of cushion steam + cylinder feed Discuss
- 3. Quenching is not necessary when hardening is done by
Options- A. case hardening
- B. flame hardening
- C. nitriding
- D. any one of these Discuss
- 4. The term 'force' may be defined as an agent which produces or tends to produce, destroys or tends to destroy motion.
Options- A. Agree
- B. Disagree Discuss
- 5. Nodular cast iron is produced by adding __________ to the molten cast iron.
Options- A. nickel
- B. chromium
- C. copper
- D. magnesium Discuss
- 6. Which of the following statement is correct as regard to centrifugal compressors?
Options- A. The flow of air is parallel to the axis of the compressor.
- B. The static pressure of air in the impeller increases in order to provide centripetal force on the air.
- C. The impeller rotates at high speeds.
- D. The maximum efficiency is higher than multi-stage axial flow compressors. Discuss
- 7. Parallel fillet welds are designed for bending strength.
Options- A. Agree
- B. Disagree Discuss
- 8. When the dimension is expressed as
, then the basic size is
Options- A. 20 mm
- B. 20.035 mm
- C. 20.025 mm
- D. 19.975 mm Discuss
- 9. The temperature required for full annealing in hyper-eutectoid steel is
Options- A. 30° C to 50° C above upper critical temperature
- B. 30° C to 50° C below upper critical temperature
- C. 30° C to 50° C above lower critical temperature
- D. 30° C to 50° C below lower critical temperature Discuss
- 10. The wet bulb depression is zero when relative humidity is
Options- A. zero
- B. 0.5
- C. 0.75
- D. 1.0 Discuss
More questions
Correct Answer: regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
Correct Answer: cylinder feed - indicated mass of steam
Correct Answer: nitriding
Correct Answer: Agree
Correct Answer: magnesium
Correct Answer: The static pressure of air in the impeller increases in order to provide centripetal force on the air.
Correct Answer: Agree
Correct Answer: 20 mm
Correct Answer: 30° C to 50° C above lower critical temperature
Correct Answer: 1.0
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