Download PTU B.Tech 2020 March AE 3rd Sem BTAE 303401 Internal Combustion Engines Question Paper

Download PTU (I.K. Gujral Punjab Technical University Jalandhar (IKGPTU) ) BE/BTech AE (Automobile Engineering) 2020 March 3rd Sem BTAE 303401 Internal Combustion Engines Previous Question Paper

1 | M-72204 (S2)-1114
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(AE) (2012 to 2017) (Sem.?3)
INTERNAL COMBUSTION ENGINES
Subject Code : BTAE-303/401
M.Code : 72204
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Answer briefly :
a) What do you understand by firing order?
b) Define Square engine.
c) Name five components of an engine.
d) What do you mean by cold starting of CI engine?
e) Name the main components of a lubrication system.
f) Explain the effect of spark advancement on engine performance.
g) How thermostat work?
h) Define Volumetric efficiency.
i) Explain the necessity of engine cooling.
j) What do you mean by supercharging?
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1 | M-72204 (S2)-1114
Roll No. Total No. of Pages : 02
Total No. of Questions : 09
B.Tech.(AE) (2012 to 2017) (Sem.?3)
INTERNAL COMBUSTION ENGINES
Subject Code : BTAE-303/401
M.Code : 72204
Time : 3 Hrs. Max. Marks : 60
INSTRUCTIONS TO CANDIDATES :
1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks
each.
2. SECTION-B contains FIVE questions carrying FIVE marks each and students
have to attempt any FOUR questions.
3. SECTION-C contains THREE questions carrying TEN marks each and students
have to attempt any TWO questions.

SECTION-A
1. Answer briefly :
a) What do you understand by firing order?
b) Define Square engine.
c) Name five components of an engine.
d) What do you mean by cold starting of CI engine?
e) Name the main components of a lubrication system.
f) Explain the effect of spark advancement on engine performance.
g) How thermostat work?
h) Define Volumetric efficiency.
i) Explain the necessity of engine cooling.
j) What do you mean by supercharging?
2 | M-72204 (S2)-1114
SECTION-B
2. Explain with figures various type of combustion chambers used in CI engine. Explain the
phenomenon of spray evaporation and combustion in CI engine.
3. a) Write a note on effects of detonation.
b) Explain the factors affecting the delay period in C.I. engines and summarize those.
4. a) Write the special features of modern carburetor.
b) Give list of the benefits of electronic fuel injection system.
5. Explain how the quantity of fuel to be injected inside combustion chamber of diesel
engine is controlled with fuel injection pump?
6. Explain the thermosiphon cooling system.

SECTION-C
7. In an Otto engine pressure and temperature at the beginning of compression are 1 bar and
37?C respectively. Calculate the theoretical thermal efficiency of the cycle, if the pressure
at the end of adiabatic compression is 15 bar. Peak temperature during the cycle is
2000K. Calculate the heat supplied per kg of air, work done per kg of air and the pressure
at the end of adiabatic expansion. Take C
v
= 0.717 kJ/kg?K and adiabatic index = 1.4.
8. a) Compare dry sump and wet sump lubrication system.
b) Write short note on SI engine fuel injection systems.
9. Define Supercharging and give its advantages. Also explain the methods of
supercharging and explain with sketch any one of them.




NOTE : Disclosure of Identity by writing Mobile No. or Making of passing request on any
page of Answer Sheet will lead to UMC against the Student.
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