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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 )	Four Stroke petrol engine	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)	With neat sketches explain the working principle of four stroke spark ignition engine.	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

Examination: 2018 SUMMER
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 3 a )	Draw turning moment diagram for four stroke petrol engine and explain it in brief.	4
Q 3 b )	What is supercharging ? State advantages of supercharging.	4
Q 4a)(a)	What are the effects of detonation in I.C. engine ?	4
Q 4b)(a)	Explain with neat sketch working principle of four stroke petrol engine.	6