# Mechanical Engineering Questions And Answers :: Compressors: part1

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 2014 and IES 2014 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. ANSWER : : one adiabatic, two isobaric, and one constant volume Explanation :
 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. ANSWER : : both (a) and (b) above Explanation :
 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. ANSWER : : at very slow speed Explanation :
 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. ANSWER : : pressure sightly less than atmospheric and temperature slightly more than atmospheric. Explanation :
 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. ANSWER : : compressor has to run at very slow speed to achieve it Explanation :

More Compressors QUESTIONS AND ANSWERS available in next pages

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