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# Auto Engine-II 4th Sem Dec 2016 Automobile Diploma Paper

## Auto Engine -II 4th Sem May 2015 Auto mobile Diploma PSBTE Paper

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### Section :- Auto Engine -II 4th Sem dec 2016 Automobile Paper

What are the limitations of wankel engine?

Q1. FILL IN THE BLANKS 1×15=15
a. Knock in C.I engine is caused by the ____________ of the charge to burn.
b. Of all the three phases of combustion process in a C.I engine, the _________ phase is the most important.
c. The _________ of the fuel is the determining factor in the C.I engine.
d _________ is done for increasing the volumetric efficiency of diesel engine.
e. Wankel rotary engine are of very ____________ speed
f. Engine exhaust emission can be measured accurately by an ___________ exhaust gas analyzer.
g. The ratio of actual mass of air to the theoretical mass of air in a diesel engine is called ____________ efficiency.
h. Iso-octane is arbitrarily rated _____________ Octane number.
i. The efficiency of a 4 stroke engine is ____________ than that of a 2 stroke engine.
j. A turbo charger is driven by the ___________ energy of the engine.
k. The diesel engine is manually started by using a ______________
l. Exhaust smoke level _____________ drastically at full load of CI engine.
m. Octane number of normal heptane is ______________
n _____________ converter is used to control auto exhaust emissions.
o ____________ curves are used for designating the relationship between the power, speed and fuel consumption.

Name the catalytic used in catalytic converters.

Catalytic used in catalytic converters.

What is calibration?

Calibration.

How nozzle is cooled and lubricated in injector?

How turbochargers are driven out in IC engines?

How fuels are rated in CI engines?

What are the various methods of emission control in internal combustion engines?

Methods of emission control in internal combustion engines.

Write the firing order of six cylinder engine?

Firing order of six cylinder engine.

Name the types of fuel injection methods.

Types of fuel injection methods.

Why helix is made in plunger of a fuel injection pump?

What is a unit injector?

Unit injector.

What is ignition delay period?

Ignition delay period.

### Section B :Auto Engine -II 4th Sem dec 2016 Automobile PAPER

Write a short note on diesel knock.

Short note on diesel knock.

Explain working of Wankel engine.

Working of Wankel engine.

What is supercharger? Why it is used.

Supercharger and its used.

Write a short note on Turbocharger.

Turbocharger.

Explain Wheel motor in detail.

Wheel motor.

List the method of emission control.

Method of emission control.

What is the necessity and function of fuel filter?

Necessity and function of fuel filter.

Write a short note on performance curve of engines.

Short note on performance curve of engines.

## Auto Engine -II 4th Sem dec 2016 Auto mobile Diploma PSBTE Paper

### Section c :-Auto Engine -II 4th Sem dec 2016 Automobile PAPER

Discuss briefly the different types of combustion chambers in a CI engine.

Types of combustion chambers in a CI engine.

Write a short note on cetane rating and octane number.

Short note on cetane rating and octane number.

What is the effect of atmospheric temperature and pressure on the performance of engine?

Effect of atmospheric temperature and pressure on the performance of engine.

Explain the working of Plunger type fuel injection pump in CI engine.

Working of Plunger type fuel injection pump in CI engine.

What are the effect of different pollutants on human life and how are these being overcome?

Effect of different pollutants on human life.