Mechanical Engineering : Compressors QUESTIONS AND ANSWERS :: part1 : 16 to 20
Following Mechanical Engineering Multiple choice objective type questions and answers will help you in BSNL JTO, GATE 2024 and IES 2024 examinations :
16.An ideal air compressor cycle without clearance on p-v diagram can be represented by following processes |
| one adiabatic, two isobaric, and one constant volume |
| two adiabatic and two isobaric |
| two adiabatic, one isobaric and one constant volume |
| one adiabatic, one isobaric and two constant volume |
| two isobaric, two adiabatic and one constant volume. |
17.Isothermal compression efficiency, even when running at high speed, can be approached by using |
| multi-stage compression |
| cold water spray |
| both (a) and (b) above |
| fully insulating the cylinder |
| high stroke. |
18.Isothermal compression efficiency can be attained by running the compressor |
| at very high speed |
| at very slow speed |
| at average speed |
| at zero speed |
| isothermally. |
19.The pressure and temperature conditions of air at the suction of compressor are |
| atmospheric |
| slightly more than atmospheric |
| slightly less than atmospheric |
| pressure slightly more than atmospheric and temperature slightly less than atmospheric |
| pressure sightly less than atmospheric and temperature slightly more than atmospheric. |
20.Isothermal compression though most efficient, but is not -practicable because |
| it requires very big cylinder |
| it does not increase pressure much |
| it is impossible in practice |
| compressor has to run at very slow speed to achieve it |
| it requires cylinder to be placed in water. |
More Compressors QUESTIONS AND ANSWERS available in next pages
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