Previous Year Very Short Questions of ACE (DIPLOMA Mechanical Engineering (RAC) 5th)

Air conditioning Engineering

Previous year question paper with solutions for Air conditioning Engineering

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  1. For saturated air, Wet bulb depression is________.(zero/one)
  2. The high concentration of people generally produces a low _______heat factor.(sensible/latent)
  3. The curve lines on the psychrometric chart indicate ______humidity.(Specific/Relative)
  4. The vapour pressure during sensible heating of air_________.(remains constant/increases)
  5. Metabolic heat production in a weak, sick or fasting man will be_______.(less/more)
  6. A _______ controls the volume of air flow by varying the cross sectional area in a duct.(damper/diffuser)
  7. The heat production from a normal healthy man when asleep is about_______ watts. (60/40)
  8. The relative humidity during heating and humidification ________. (decreases/increases)
  9. The recommended outside air required per person in a meeting room is ________m3 /min. (1.5/1.2)
  10. On the psychrometric chart, the alignment circle is marked at 25O C DBT and ________humidity. (40/50)
  11. For winter air conditioning relative humidity should not be more than_______ (40%/60%)
  12. The efficiency of a coil will be _______when its by pass factor is zero. (one/zero)
  13. A low wet bulb temperature indicates very ______humidity.(high/low)
  14. During sensible cooling, the specific humidity of the moist air ________.(remains constant/increases)
  15. The high concentration of people generally produces a_______ sensible heat factor.(low/high)
  16. The people seated as rest require a_______ effective temperature than the people doing heavy physical activity.(higher/lower)
  17. The sensible heat factor for an auditorium or cinema is generally kept as_______. (0.7/0.8)
  18. The heat energy dissipated/watt in incandescent light is ________. (7.96KJ/10.96KJ)
  19. From appearance point of view, the shape of the duct preferred as ________. (rectangular/square)
  20. The difference between dry bulb temperature and dew point temperature is________. (dry bulb depression/dew point depression)
  21. An opening through which air is supplied to treated space is called ………………
  22. The methods of sizing the ducts are ……………….., ………………. and ………………….
  23. ………….is a grill provided with a damper.
  24. For air conditioning the cooling load may be classified as…..….load and ………load.
  25. ………………..is a material that offers resistance to the flow of heat through it.
  26. 1.5 TON air conditioner removes heat …………...Kcal/Hr.
  27. Deflecting vane anemometer is also called ………..
  28. …………is defined as an unwanted sound.
  29. ……….fan produces a flow of air in a direction parallel to the axis of rotation
  30. The art of measuring the moisture content in air is termed as…………