MCQs of IC Engine Performance and Emissions (Applied Thermodynamics - 3161910)

Applied Thermodynamics (3161910) MCQs

MCQs of IC Engine Performance and Emissions

Showing 21 to 20 out of 30 Questions

21.

An engine produces 10 kW brake power while working with a brake thermal efficiency of 30%. If the calorific value of the fuel used is 40000 kJ/Kg, then what is the fuel consumption?

(a)	$1.5 \frac{k g}{h r}$
(b)	$3 \frac{k g}{h r}$
(c)	$0.3 \frac{k g}{h r}$
(d)	$1 \frac{k g}{h r}$

22.

Besides mean effective pressure, which of the data needed for determining the indicated power of an engine?

(a)	Piston diameter, length of stroke and calorific value of fuel
(b)	Piston diameter, specific fuel consumption and calorific value of fuel
(c)	Piston diameter, length of stroke and speed of rotation
(d)	Specific fuel consumption, speed of rotation and torque

23.

Which of the following is one of the major exhaust emissions from CI engines compared to SI engines?

(a)	Oxides of nitrogen
(b)	Particulates
(c)	Carbon monoxide and Carbon dioxide
(d)	Unburnt hydrocarbon

24.

Why lead compounds added in petrol?

(a)	Increase power output
(b)	Reduce knocking
(c)	Reduce exhaust temperature
(d)	Reduce HC emission

25.

What can be reduced by using exhaust gas recirculation (EGR) effectively?

(a)	$C O$
(b)	$N O_{x}$
(c)	$H C$
(d)	$C O a n d H C$

26.

What is the major difference between BS-IV and BS-VI norms?

(a)	BS-IV fuels contain 80 ppm sulphur and BS-VI fuels contain 60 ppm sulphur
(b)	BS-IV fuels contain 100 ppm sulphur and BS-VI fuels contain 90 ppm sulphur
(c)	BS-IV fuels contain 50 ppm sulphur and BS-VI fuels contain 10 ppm sulphur
(d)	BS-IV fuels contain 150 ppm sulphur and BS-VI fuels contain 110 ppm sulphur

27.

As per BS-VI, which are the emissions standards for four-wheel diesel motor vehicles?

(a)	$0.005 \frac{g}{k m} P M a n d 0.060 \frac{g}{k m N O_{x}}$
(b)	$0.0045 \frac{g}{k m} P M a n d 0.060 \frac{g}{k m N O_{x}}$
(c)	$0.005 \frac{g}{k m} P M a n d 0.76 \frac{g}{k m N O_{x}}$
(d)	$0.085 \frac{g}{k m} P M a n d 0.56 \frac{g}{k m N O_{x}}$

28.

Catalytic converters are used to reduce the concentration of..............in the exhaust.

(a)	$C O$
(b)	$H C$
(c)	$N O_{x}$
(d)	$C O, H C a n d N O_{x}$

29.

As per BS-VI, which are the emissions standards for four-wheel petrol motor vehicles?

(a)	$0.0045 \frac{g}{k m} P M a n d 0.08 \frac{g}{k m} N O_{x}$
(b)	$0.0045 \frac{g}{k m} P M a n d 0.98 \frac{g}{k m} N O_{x}$
(c)	$0.045 \frac{g}{k m} P M a n d 0.98 \frac{g}{k m} N O_{x}$
(d)	$0.045 \frac{g}{k m} P M a n d 0.9 \frac{g}{k m} N O_{x}$

30.

What are the major pollutants emitted from the exhaust due to incomplete combustion?

(a)	Carbon monoxide
(b)	Hydrocarbons
(c)	Oxides of nitrogen
(d)	All of the mentioned

Showing 21 to 20 out of 30 Questions