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Topic wise Paper Solution

Examination: 2017 SUMMER
Que.No Question/Problem marks
Q 1b)(a)

Give classification of IC engines (any six)..........

6

Q 2 a )

In an Ideal ottocycle the air at the beginning of isentropic compression is at 1.01325 bar and......

8

Q 3 )

Represent Brayton cycle on PV and TS diagram.......

4

Q 5 a )

Explain the working of 4-stroke petrol engine with neat sketch............

8

Examination: 2017 WINTER
Que.No Question/Problem marks
Q 1a)(a)

Draw p-v and T-S diagram for Diesel cycle. Name the processes involved in it.

4

Q 1a)(b)

Draw actual valve timing diagram for 4-stroke petrol engine.

4

Q 1b)(a)

Draw a neat labelled sketch of fuel injection pump. Give its function.

6

Q 3 a )

Explain MPFI with neat sketch.

4

Q 3 b )

Differentiate supercharging and turbocharging in I.C. engine.

4

Q 4a)(d)

Explain w.r.to. dual cycle i) cutoff ratio ii) pressure ratio.

4

Q 4b)(b)

Draw superimposed p-v diagram of Otto cycle, Diesel cycle and Dual cycle to compare their efficiencies for same compression ratio (R c ) and heat rejection (Q r ).

6

Examination: 2016 SUMMER
Que.No Question/Problem marks
Q 1a)(a)

Represent ‘Brayton Cycle’ on P-V and T-S diagram.

4

Q 1a)(d)

Draw ‘Valve timing diagram for 4-stroke cycle diesel engine.

4

Q 3 d )

What is ‘Scavenging’ ? List any two types of ‘scavenging’.

4

Q 3 e )

Explain in brief the importance of ‘Super Charging’.

4

Q 4a)(a)

Explain in brief the constructional features of MPFI engine

4

Q 4a)(c)

State any four effect of detonation............

4

Q 4b)(b)

A petrol engine working on constant volume cycle has compression ratio.......

6

Q 6 c )

Represent Carnot cycle on P-V and T-S diagram

4

Examination: 2016 WINTER
Que.No Question/Problem marks
Q 1a)(a)

State four assumptions made for air standard cycle.

4

Q 1a)(c)

Compare SI and CI engine on the basis...

4

Q 3 d )

Name four sensors used in I.C. engine and explain working of any one.

4

Q 3 e )

What is scavenging in I.C. engine ? State its types.

4

Q 4a)(a)

Explain the process of combustion in diesel engine.

4

Q 4a)(b)

Explain battery ignition in S.I. engine.

4

Q 6 b )

A diesel engine has a compression ratio of 14 and cut-off takes place at 6% of stroke....

4

Examination: 2015 SUMMER
Que.No Question/Problem marks
Q 1a)(a)

Write the equations for air standard efficiency of otto cycle.......

4

Q 3 a )

Draw actual valve timing diagram for 4-stroke petrol engine.

4

Q 3 b )

Explain turb charging with a neat sketch........

4

Q 4 a )

What are the causes of detonation in I.C. engine ?

4

Q 4b)(a)

Explain with neat sketch turning moment diagram for a four-stroke engine.

6

Q 6 a )

What is MPFI ? Explain any one MPFI system with neat sketch

4

Examination: 2015 WINTER
Que.No Question/Problem marks
Q 1a)(a)

An engine of diameter 250 mm and 375 mm stroke works on otto cycle...........

4

Q 1a)(d)

What is pre-ignition ? State any two factors responsible for pre-ignition.

4

Q 1b)(a)

A petrol engine working on otto cycle has compression ratio 8 ....

6

Q 3 d )

Name the different sensors used in ECU of modern automobile with their application....

4

Q 3 e )

Explain different stages of combustion in C.I. engine with sketch.

4

Q 4a)(a)

Explain MPFI system with sketch

4

Q 4a)(c)

Draw and explain Battery ignition system.

4

Q 4b)(b)

Explain working of 4 stroke S.I. engine with neat sketch.

6

Q 6 c )

Draw P-V and T-S diagram for dual cycle. Name the processes involved in it.....

4

Examination: 2014 WINTER
Que.No Question/Problem marks
Q 1a)(i)

Why does the Carnot heat engine not exist in practice......

4

Q 1a)(iv)

Compare the effect of supercharging on S.I. engine and C.I. engine...........

4

Q 3 d )

Draw super imposed PV and TS diagrams of otto cycle..........

4

Q 3 e )

Draw P-V and T-S diagram for carnot cycle. Name the processes involved in it..............

4

Q 4a)(ii)

Define cut off ratio. Express it in terms of compression ratio and expansion ratio.

4

Q 4a)(iii)

Differentiate between L-MPFI system and D-MPFI system.....

4

Q 4a)(l)

State the functions of following components used in battery ignition system.........

4

Q 4b)(ii)

Draw theoretical and actual P-V diagrams for S.I. engines and explain briefly...

6

Q 6 a )

Which is more effective way to increse the C.O.P. of refrigerator,......

4

Q 6 c )

An engine working on otto cycle has,....

4

Q 6 e )

In gas turbine plants, Brayton cycle is more suitable than otto cycle...

4