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Topic wise Paper Solution

Examination:
Que.No	Question/Problem	marks
Q 6 b )	Define.............	4

Examination: 2017 SUMMER
Que.No	Question/Problem	marks
Q 1a)(a)	Enlist uses of compressed air (any four).	4
Q 1a)(b)	What are the advantages of multistaging ?	4
Q 2 c )	Differentiate between reciprocating air compressor and rotary air compressor.	8
Q 4a)(b)	Explain with sketch working of screw compressor.	4
Q 4b)(ii)	Explain the working of two stage reciprocating compressor.......	6
Q 6 b )	What is the necessity of purification of air ? How to remove oil, moisture and dust from air.......	4

Examination: 2017 WINTER
Que.No	Question/Problem	marks
Q 1a)(c)	Classify air compressors	4
Q 2 a )	Reciprocating air compressor draws 6 kg of air per minute at 25°C. It compresses the air....	8
Q 5 a )	State the methods to improve efficiency of air compressor.......	8
Q 5 b )	State the applications of reciprocating compressor......	8
Q 6 d )	Enlist different uses of compressed air.	4

Examination: 2016 SUMMER
Que.No	Question/Problem	marks
Q 1a)(b)	Define following terms w.r.t. air compressor.............	4
Q 1a)(c)	Enlist different uses of compressed air.	4
Q 2 a )	t is desired to compress 15 m3 of air per minute from 1.0132 bar to 10 bar. Calculate minimum power required to drive........	8
Q 5 b )	What do you mean by ‘Perfect Intercolling’ ? Explain with the help of P.V. diagram.	8
Q 6 b )	Why majority of air compressors available in the market are multi...........	4

Examination: 2016 WINTER
Que.No	Question/Problem	marks
Q )	Explain with neat sketch working of lobe type air compressor	4
Q 1a)(b)	A two stage air compressor with perfect intercooling takes in air at 1 bar pressure and 27 °C	4
Q 2 b )	A single stage reciprocating air compressor has a swept volume of 2000 cm3 and runs at 800 rpm.	8
Q 5 b )	A single cylinder reciprocating compressor has a bore of 120 mm and a stroke of 150 mm...	8
Q 6 a )	What is the necessity of purification of air in compressor and how it is done ?	4

Examination: 2015 SUMMER
Que.No	Question/Problem	marks
Q 1a)(b)	Define : i) Compression ratio...	4
Q 1a)(c)	Write uses of compressed air.	4
Q 1a)(d)	Draw a neat sketch of vane compressor and label the different parts...........	4
Q 2 b )	What is the necessity of multistage compression.......	8
Q 5 a )	Differentiate between reciprocating and rotary compressors	8

Examination: 2015 WINTER
Que.No	Question/Problem	marks
Q 1a)(b)	State any four industrial uses of compressed air.	4
Q 1a)(c)	Define the following terms related to compressor....	4
Q 2 a )	Compare Reciprocating air compressor and Rotary air...	8
Q 5 b )	A pneumatic rock drill requires 10 kg/min of air at 6 bar pressure....	8
Q 6 b )	Define perfect and imperfect inter-cooling in air compressor and show it by graph also....	4

Examination: 2014 WINTER
Que.No	Question/Problem	marks
Q 1a)(ii)	Define following efficiencies related to compressors	4
Q 1a)(iii)	Show the effect of increase of compression ratio in a single..........	4
Q 2a)(i)	The criterion of the thermodynamic efficiency ............	8
Q 2a)(ii)	Compare reciprocating compressors and centrifugal compressors......	8
Q 5 b )	A single stage single acting air compressor delivers 0.6 kg of air per minute at 6.1 bar...	8
Q 6 b )	Define displacement of compressor for two stage compressor...	4

Examination: 2018 SUMMER
Que.No	Question/Problem	marks
Q 1a)(c)	Give the classification of air-compressors	4
Q 1a)(d)	Explain with neat sketch working principle of Lobe compressor	4
Q 2 b )	Explain construction and working of single stage reciprocating air compressor	8
Q 5a)(i)	Compare reciprocating and rotary compressors (any four).	8
Q 5a)(ii)	Write any four applications of compressed air.	8
Q 6 b )	Define : i) Isothermal efficiency.	4