Question 1

The spark timing and combustion rate should be such that

Accepted Answer

A) peak pressure occurs at TDC 
B) one half of the total pressure occurs at TDC 
C) ignition delay is reduced 
D) none of the above 
A) peak pressure occurs at TDC 
B) one half of the total pressure occurs at TDC 
C) ignition delay is reduced 
D) none of the above B

Question 2

Chemilumine scence analyzer is used for measuring

Accepted Answer

A) NOx 
B) CO 
C) HC 
D) CO2 
A) NOx 
B) CO 
C) HC 
D) CO2 A

Question 3

Flame ionization detector is used for measuring

Accepted Answer

A) CO 
B) HC 
C) NOx 
D) CO2 
A) CO 
B) HC 
C) NOx 
D) CO2 B

Question 4

Volumetric efficiency is a measure of

Accepted Answer

A) speed of the engine 
B) power of the engine 
C) breathing capacity of the engine 
D) pressure rise in the cylinder 
A) speed of the engine 
B) power of the engine 
C) breathing capacity of the engine 
D) pressure rise in the cylinder

Question 5

Turbocharger engines are those in which charge density is increased by

Accepted Answer

A) separate air compressors 
B) compressors driven by exhaust gas turbine 
C) cooling inlet air 
D) none of the above 
A) separate air compressors 
B) compressors driven by exhaust gas turbine 
C) cooling inlet air 
D) none of the above

Question 6

Morse test is applicable only to

Accepted Answer

A) single cylinder SI engines 
B) single cylinder CI engines 
C) multicylinder CI engines 
D) single and multicylinder SI and CI engines 
A) single cylinder SI engines 
B) single cylinder CI engines 
C) multicylinder CI engines 
D) single and multicylinder SI and CI engines

Question 7

Indicated power is directly proportional to

Accepted Answer

A) torque 
B) air consumption 
C) cylinder peak pressure 
D) none of the above 
A) torque 
B) air consumption 
C) cylinder peak pressure 
D) none of the above

Question 8

Limitations of air cooling systems are

Accepted Answer

A) applicable only to large engines 
B) cooling is fast 
C) higher working temperature compared to water cooling 
D) all of the above 
A) applicable only to large engines 
B) cooling is fast 
C) higher working temperature compared to water cooling 
D) all of the above

Question 9

In the air bOx method of measuring air flow, the air box is provided to

Accepted Answer

A) have constant temperature 
B) have constant flow 
C) damp out the pulsations 
D) provide constant velocity of flow 
A) have constant temperature 
B) have constant flow 
C) damp out the pulsations 
D) provide constant velocity of flow

Question 10

The air box/swept volume ratio should be in the range for single-cylinder engines

Accepted Answer

A) 10- 100% 
B) 200-300% 
C) 500 600% 
D) > 1000% 
A) 10- 100% 
B) 200-300% 
C) 500 600% 
D) > 1000%

Question 11

Mechanical efficiency is ratio of

Accepted Answer

A) fp to bp 
B) fp to ip 
C) bp to ip 
D) ip to fp 
A) fp to bp 
B) fp to ip 
C) bp to ip 
D) ip to fp

Question 12

The best method of measuring speed is by

Accepted Answer

A) mechanical tachometer 
B) electrical tachometer 
C) magnetic pickup 
D) none of the above 
A) mechanical tachometer 
B) electrical tachometer 
C) magnetic pickup 
D) none of the above

Question 13

The most accurate method of determining fp is by

Accepted Answer

A) Willan's line 
B) Morse test 
C) measurement of brake and indicated power 
D) motoring test 
A) Willan's line 
B) Morse test 
C) measurement of brake and indicated power 
D) motoring test

Question 14

The measurement of frictional power by Willans line is applicable only to

Accepted Answer

A) SI engines at a particular speed 
B) CI engines at a particular speed 
C) any engine at a particular speed only 
D) none of the above 
A) SI engines at a particular speed 
B) CI engines at a particular speed 
C) any engine at a particular speed only 
D) none of the above

Question 15

Non-dispersive infra-red analyzer is widely accepted instrument for measuring

Accepted Answer

A) NO 
B) HC 
C) CO 
D) CO2 
A) NO 
B) HC 
C) CO 
D) CO2

Question 16

Maximum allowable hydrocarbon in the car emission are approximately

Accepted Answer

A) 10 ppm 
B) 100 ppm 
C) 1000 ppm 
D) 5000 ppm 
A) 10 ppm 
B) 100 ppm 
C) 1000 ppm 
D) 5000 ppm

Question 17

Which is more viscous lib oil

Accepted Answer

A) SEA 30 
B) SAE 40 
C) SAE 50 
D) SAE 80. 
A) SEA 30 
B) SAE 40 
C) SAE 50 
D) SAE 80.

Question 18

For N is the rpm, number of power strokes per minute in a four-stroke engine is

Accepted Answer

A) 2N 
B) N/2 
C) N 
D) 4N 
A) 2N 
B) N/2 
C) N 
D) 4N

Question 19

The volumetric efficiency of a well-designed engine is in the range

Accepted Answer

A) 30 to 40% 
B) 40 to 609% 
C) 60 to 70% 
D) 75 to 90% 
A) 30 to 40% 
B) 40 to 609% 
C) 60 to 70% 
D) 75 to 90%

Question 20

If N is the rpm, number of power strokes per minute in a two-stroke engine is

Accepted Answer

A) N 
B) 2N 
C) N/2 
D) 4N 
A) N 
B) 2N 
C) N/2 
D) 4N

The spark timing and combustion rate should be such that

Chemilumine scence analyzer is used for measuring

Flame ionization detector is used for measuring

Volumetric efficiency is a measure of

Turbocharger engines are those in which charge density is increased by

Morse test is applicable only to

Indicated power is directly proportional to

Limitations of air cooling systems are

In the air bO_x method of measuring air flow, the air box is provided to

The air box/swept volume ratio should be in the range for single-cylinder engines

Mechanical efficiency is ratio of

The best method of measuring speed is by

The most accurate method of determining fp is by

The measurement of frictional power by Willans line is applicable only to

Non-dispersive infra-red analyzer is widely accepted instrument for measuring

Maximum allowable hydrocarbon in the car emission are approximately

Which is more viscous lib oil

For N is the rpm, number of power strokes per minute in a four-stroke engine is

The volumetric efficiency of a well-designed engine is in the range

If N is the rpm, number of power strokes per minute in a two-stroke engine is

Internal Combustion Engines and Their Advantages and Disadvantages

Diesel Engines and Thermodynamic Cycles

Combustion and Efficiency in Engines

Fuel and Hydrocarbon

Automobile Engine Fuel Systems

Fuel Injection and Ignition Systems in Automotive Engineering

Supercharging and Ignition Timing in Engines

Combustion and Engine Performance in IC Engines

Automotive Engine Lubrication and Cooling System

Exhaust Emissions and Control Systems in Vehicles

Filters

Exam 10: Engine Cooling, Efficiency, and Emissions

The spark timing and combustion rate should be such that

Chemilumine scence analyzer is used for measuring

Flame ionization detector is used for measuring

Volumetric efficiency is a measure of

Turbocharger engines are those in which charge density is increased by

Morse test is applicable only to

Indicated power is directly proportional to

Limitations of air cooling systems are

In the air bOx method of measuring air flow, the air box is provided to

The air box/swept volume ratio should be in the range for single-cylinder engines

Mechanical efficiency is ratio of

The best method of measuring speed is by

The most accurate method of determining fp is by

The measurement of frictional power by Willans line is applicable only to

Non-dispersive infra-red analyzer is widely accepted instrument for measuring

Maximum allowable hydrocarbon in the car emission are approximately

Which is more viscous lib oil

For N is the rpm, number of power strokes per minute in a four-stroke engine is

The volumetric efficiency of a well-designed engine is in the range

If N is the rpm, number of power strokes per minute in a two-stroke engine is

Internal Combustion Engines and Their Advantages and Disadvantages

Diesel Engines and Thermodynamic Cycles

Combustion and Efficiency in Engines

Fuel and Hydrocarbon

Automobile Engine Fuel Systems

Fuel Injection and Ignition Systems in Automotive Engineering

Supercharging and Ignition Timing in Engines

Combustion and Engine Performance in IC Engines

Automotive Engine Lubrication and Cooling System

Exhaust Emissions and Control Systems in Vehicles

Filters

In the air bO_x method of measuring air flow, the air box is provided to