B.TechSemester 52025-26I C Engines Fuels LubricationBME052

I C Engines Fuels Lubrication (BME052) - AKTU Question Paper 2025-26

B.Tech · Semester 5 · Free PDF Download

This is the official AKTU I C Engines Fuels Lubrication Previous Year Question Paper for B.Tech Semester 5, academic session 2025-26. Published by Dr. A.P.J. Abdul Kalam Technical University (AKTU/UPTU), Lucknow. Free PDF download — no login required.

Course:B.Tech

Semester:Semester 5

Session:2025-26

University:AKTU / UPTU

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Questions Asked in 2025-26

I C Engines Fuels Lubrication (BME052) — complete question paper · 70 marks · 3 Hours

Section AAttempt all q u e s t i o n s i n b r i e f . 02 x 7 = 14

a
What is supercharging in I.C. Engines?
b
State the functional requirement of an injection system
c
Why the power output of an engine reduces at high altitude comp ares to its rated output at sea level
d
Explain the principle of carburetion
e
Enlist various types of cooling systems along with its importance
f
Explain the role of lubricants in engine
g
Distinguish between physical ignition delay and chemical ignition delay

Section BAttempt any three o f t h e f o l l o w i n g : 07 x 3 = 21

a
Compare the otto and diesel cyc le for the same maximum press ure and heat input & same compression ratio and heat rejection
b
Describe the phenomenon of detonation or knocking in CI engine
c
Explain the different facto rs affecting detonation in S.I. engine
d
In an air-standard Otto cycle , the compression ratio is 10. The condition at the beginning of the compression process is 100 kPa and 27 oC. Heat added at constant volume is 1500 kJ/kg, while 700 kJ/kg of heat is rejected during the other constant volume process in the cycle. Specific g a s constant for air = 0.287 kJ/kgK. Calculate:- (i) Thermal efficiency (ii) Mean effective pressure (in kPa) of the c ycle
e
Derive the formula of air s tandard efficiency of otto cycle. 5 K 3

Section CAttempt any one p a r t o f t h e f o l l o w i n g : 07 x 1 = 07

a
Explain the stages of combustion in SI engine with neat sket ches. Also draw T-S diagram
b
Discuss the combustion chambe r design for CI engine with neat sketch
a
Describe the construction and working of a simple carburetor . What are the limitations of carburetors?
b
What is turbocharging? Explain the working of waste-gate and v a r i a b l e geometry turbochargers. I C ENGINES, FUELS & LUBRICATION
a
Explain the sources and types of engine pollutants. Discuss their effects on the environment and human health
b
Explain the formation mechan isms of NOx, CO, hydrocarbons, a nd particulate emissions in IC engines
a
Describe various methods use d to control exhaust emissions in CI engines
b
Explain different engine coo ling systems used in IC engines. Describe the construction and working of radiators and cooling fans
a
Define engine friction and l ubrication. Explain the principle of lubrication, types of lubrication systems, and properties of lubricating oils
b
Describe ignition system requirements in SI engines. Explain m a g n e t o ignition system briefly

Question text is extracted from the official AKTU question paper PDF above. Hindi translations are omitted — every question is printed in English in the original paper. Last verified: 2026-08-23.

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