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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

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

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