Refrigeration and Air-conditioning (Mechanical Engineering) 1 Online Test

Identify the refrigerant used for refrigeration purposes in passenger aircraft
Freon-12
Carbon dioxide
Air
Sodium chloride
Suggest the material to be used for the pipes and pipe fittings in an ammonia refrigerantion plant
Aluminium
Brass
Copper
Cast steel or wrought iron
R-12 is generally preferred over R-22 in deep freezers since
It has low operating pressures
It gives high coefficient of performance
It is miscible with oil over large range of temperatures
It is non-toxic and non-inflammable
Ammonia is preferred as a refrigerant in large commercial installations because
It is non-toxic
It has low latent heat
It has low working pressure
It is relatively cheap
Identify the refrigerant with highest toxicity
Freon-12
Ammonia
Sulphur dioxide
Carbon dioxide
Which of the following refrigerants has the lowest specific volume?
Carbon dioxide
Ammonia
Freon-12
Freon-22
Which of the following pair of refrigerants is both colourless and odourless?
Carbon dioxide and Freon-12
Sulphur dioxide and carbon dioxide
Freon-12 and ammonia
Carbon dioxide and ammonia
The refrigerant Freon-12 is a compound consisting of
Corbon, hydrogen and fluorine
Carbon, hydrogen and chlorine
Carbon, chlorine and fluorine
Carbon, hydrogen, chlorine and fluorine
The chemical formula of Freon-12 is
CCI F2
CCI2 F3
CCI2 F2
CCIF
The Freon group of refrigerant are
Inorganic refrigerants
Hydrocarbon refrigerants
Halo-carbon refrigerants
Azeotraope refrogerants
Which of the following parameters remains constant during adiabatic saturation process on unsaturated air?
Dry bulb temperature
Wet bulb temperature
Dew point temperature
Relative humidity
The refrigerant commonly used for commercial ice plants is
Freon-12
NH3
CO2
Air
Which of the following refrigerants has the minimum freezing point?
Ammonia
Carbon dioxide
Freon-12
Freon-22
Which of the following pair of refrigerants is both non-toxic and non-inflammable?
NH3 and SO2
CO2 and SO2
CO2 and F12
F12 and NH3
The critical pressure is the pressure_____
Above which explosion of liquid occurs
Above which a liquid will remain a liquid
Above which a liquid turns into a vapour
Below which a liquid remains only in the liquid state
The wet bulb depression is zero when relative humidity equals
Zero
0.5
0.75
1.0
Description:

This is an exclusive test on Refrigeration and Air-conditioning under a series of tests of Mechanical Engineering which is attributed to Competitive Examination Preparations e.g. IAS (Optional), GATE, IES etc.

Discussion

Missmsittha

you so much for this. I was into this issue and tired to tinker around to check if its possible but couldnt get it done. Now that i have https://kodi.software/ seen the way you did it, thanks guys
with
regards

448 days 13 hours 10 minutes ago

Missmsittha

Thank you so much for this. I was https://plex.software into this issue and tired to tinker around to check if its possible but couldnt get it done. Now that i have seen the way you did it, thanks guys
with
regards

448 days 13 hours 10 minutes ago

Amine

man!! i though i knew it all

2220 days 13 hours 30 minutes ago

Amit Mahajan

dichlorodifluoromethane and is now referred to as 'Freon-12
question 8 ??????????
chlorine ,fluorine ,carbon and hydrogen are there... not just chlorine ,fluorine ,carbon

2294 days 18 hours 40 minutes ago

hafiz zafar sharif

It is one of the easiest way to teach and engage the students.

2405 days 21 hours 38 minutes ago

Sunil

it is best way to build practical practice in theoritical knowledge

2442 days 3 hours 39 minutes ago

binay

intresting question about refrigeration

3360 days 1 hours 14 minutes ago

yadwinder singh

thanx

3481 days 21 hours 1 minutes ago

bharat

it was very useful test i need these types of tests in all subjects which are there in gate examination

3504 days 21 hours 46 minutes ago

Faisal

Very best tests for best knowledgement thanx......

3505 days 2 hours 6 minutes ago

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