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Auto Engine-II 4th Sem May 2019 Automobile Diploma Paper

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Auto Engine -II 4th Sem May 2019 Automobile Diploma PSBTE Paper

                              SECTION-A

Q1. a) Fill in the blanks.                                      10×1.5=15

i. Increase in delay period cause ____________ in knocking.
ii. Compression ratio is limited in petrol engine as more compression ratio causes __________.
iii. The valve tappet clearance is measured by _____________ .
iv. ___________ = I.H.P – B.H.P.
v. Oxygen sensor is fitted at ______________.

b) State True or False.

vi. During suction stroke, the inside pressure of cylinder is lesser than atmospheric pressure.
vii. Compression ratio of diesel engine is greater than petrol engine.
viii. The fuel feed pump in a diesel is mounted on the fuel injection pump.
ix. Nox produced in the engine at low temperature.
x. Defective fuel cause excessive knocking.

                          SECTION-B

Q2. Attempt any five questions. 5×6=30
a. Write basic difference between supercharger and turbocharger.
b. Explain the effect of engine performance in high altitude and desert.
c. Explain positive crankcase ventilation.
d. What are the effects of different pollutants on human body?
e. Explain series and parallel type Hybrid System.
f. Explain Indicated power. How we calculate it in multi cylinder engine.
g. Explain two types of supercharger.

                                   SECTION-C

Q3. Attempt any two questions. 2×15=30
i. Explain the various stages of combustion in diesel engine with neat sketch. Write methods to control knocking in diesel engine.
ii. Explain CRDI engine with neat sketch.
iii. Write short note on the following. (any two)
a) Fuel Filters and its types b) HCCI Engine c) Plunger type fuel injection pump.

Basic difference between supercharger and turbocharger.

Effect of engine performance in high altitude and desert.

Positive crankcase ventilation.

Related Post

Effects of different pollutants on human body.

Series and parallel type Hybrid System.

Indicated power. How we calculate it in multi cylinder engine.

Two types of supercharger.

Auto Engine -II 4th Sem May 2019 Automobile Diploma PSBTE Paper Click Here

Auto Engine -II 4th Sem May 2019 Auto mobile Diploma PSBTE Paper

Methods to control knocking in diesel engine.

CRDI engine with neat sketch.

HCCI Engine 

Plunger type fuel injection pump.

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