Combustion MCQs
Combustion MCQs
Our experts have gathered these Combustion MCQs through research, and we hope that you will be able to see how much knowledge base you have for the subject of Combustion by answering these multiple-choice questions.
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1: What is the term for when the piston is at its lowest position in the cylinder?
A. Bottom Dead Center
B. No Gas
C. Top Dead Center
D. Intake valves are open
2: What does bottom dead center mean?
A. When the engine reaches its operating temperature
B. When the bullet exits the barrel
C. At the point where the piston makes contact with the cylinder
D. When the firing pin hits the primer
E. When the piston is at the bottom of the cylinder
3: Brake mean effective pressure is similar to what during power stroke?
A. The real mean torque
B. The radially averaged torque
C. The effective pressure at the beginning of power stroke
D. The nominal torque
4: What is a measurement used to compare the efficiency of internal combustion engine?
A. Horsepower
B. Brake Specific Fuel Consumption
C. Fuel Economy
D. Torque
5: Brake Specific Fuel Consumption is used for what comparison?
A. Comparing the efficiency of internal combustion engines with electric motors
B. Comparing the efficiency of internal combustion engines with hybrid systems
C. Comparing the efficiency of internal combustion engines with a shaft output
D. Comparing the efficiency of gasoline engines with a diesel engine
E. Comparing the efficiency of diesel engines with a gasoline engine
6: What is the term used to describe the portion of the crank that releases 50% of the heat?
A. Camshaft position
B. Crank angle position
C. Valve timing
D. Timing belt
7: What percentage of heat is released by the crank?
A. 90%
B. 80%
C. 70%
D. 95%
8: What is the value that represents the ratio of the volume of engine combustion chamber from its largest capacity to its smallest capacity?
A. Octane Rating
B. Compression Ratio
C. Displacement
D. Horsepower
E. Volume
9: A compression ratio is a fundamental specification for what?
A. Airbags
B. The amount of air an engine can use
C. Many common combustion engines
D. Engine valves
E. The pressure inside a gas tank
10: What does the term "EGR" stand for?
A. Exhaust Gas Recirculation Valve
B. Exhaust Gas Removal
C. Exhaust Gas Recirculation
D. Engineered Gas Reform
E. Engine Block Hugger
11: How does the use of exhaust gas recirculation help with NOx emission?
A. Emitting
B. Reducing
C. Controlling
12: What is the ratio in a reciprocating engine?
A. Air/Fuel
B. Fuel/Air and Steam
C. Fuel/Exhaust
D. Fuel/Air
13: What is the name of the mean effective pressure lost due to engine friction?
A. Pressure Drops
B. Pressure Losses
C. Turbine Mean Effective Pressure
D. Friction Mean Effective Pressure
E. Fan Mean Effective Pressure
14: What type of ignition uses a spark plug to create the spark?
A. Proprietary Diesel
B. Spark-Ignition
C. Compression Ignition
D. Homogeneous Charge Compression Ignition
E. Direct Injection
15: In a homogeneous charge, what type of ignition is used?
A. Combustion Ignition
B. Charge Compression Ignition
C. Spark Ignition
D. Thermionic Ignition
16: How long is the engine cycle in a 4 stroke engine?
A. 720°
B. 2,160°
C. 1,440°
D. 1080°
E. 1440°
17: What is calculated from in cylinder pressure?
A. Stroke pressure
B. Peak cylinder pressure
C. Static pressure
D. Dynamic pressure
E. Mean effective pressure
18: How many cycles do two-stroke engines have versus four-stroke engines?
A. 120°
B. 360°
C. 180°
D. 60°
19: What does indicated specific fuel consumption represent?
A. Specific fuel consumption for a given driving situation
B. Specific fuel consumption based on the vehicle's speed
C. Specific fuel consumption based on the vehicle's weight
D. Specific fuel consumption for a given power level
E. Specific fuel consumption based on the engine in-cylinder pressures
20: What is indicated specific fuel consumption based on?
A. The operating temperature
B. The gear ratio
C. The engine speed
D. The engine in-cylinder pressures
21: What does the acronym IND indicate?
A. Indian National Drug Control Program
B. Indian National Diet
C. Indicated Specific Fuel Consumption
D. Insurance Department
E. Indicate New Directions
22: What does the term "Knock" mean?
A. A summons to enter
B. A door knock
C. Undesired auto-ignition
D. Calling out someone's name
23: What do you call an undesired auto-ignition appearing in an unburned area of the combustion chamber?
A. Knock
B. Blowtorch
C. Fireball
D. Blow
24: What type of ignition is undesired?
A. Ignition interference
B. Pilot light
C. Auto-ignition
D. Spark
E. A spark from the plug gap
25: How determined by subtracting the heat of vaporization of the water vapor?
A. Lower Heating Value
B. Higher Heating Value
C. Temperature of boiling water
D. Not Determinant
26: What determines the lower heating value?
A. The amount of heat required to vaporize the water
B. Subtracting the heat of vaporization of the water vapor
C. The weight of the water
D. The specific heat of the water
27: What is the scale of the Mass Fraction Burned?
A. 1 to 10
B. 10 to 100
C. 0 to 1
D. 1 to 100
E. 0.1 to 10
28: What does 'mass fraction burned' describe?
A. The weight of a substance
B. The mass of the substance
C. The weight of material burned
D. The process of chemical energy release
E. The average mass of material burned
29: What percentage of a person's weight can be applied to their back?
A. 20%
B. 10%
C. 30%
30: What would be the result if the crank angle was 10% MFB?
A. No change
B. Less Torque
C. More Torque
D. The timing belt would slip
E. Crank Angle for 10% MFB
31: What is the term for spark timing expressed in crank angle degrees?
A. Spark advance
B. Ignition timing
C. Spark retard
D. Timing adjustment
32: Spark Advance is expressed in what unit?
A. Crank angle degrees
B. Watts
C. Volt
D. Amp
E. Horsepower
33: What is an example of a spark ignited engine?
A. Gasoline Engine
B. Diesel Engine
C. Carburetor
D. Spark Ignition
E. Injection Pump
34: What type of engine is an example of an Spark Ignition engine?
A. Gasoline
B. Dual ignition
C. Spark ignited
D. Diesel
E. Compression ignition
35: What is the measurement of injection timing expressed in?
A. Engine speed rpm
B. Injector pulsewidth
C. Revs per minute
D. Crank angle degrees
36: What type of timing is expressed in crank angle degrees?
A. Carburetor
B. EFI
C. Fuel Injection
D. Carburation
E. Injection
37: What is the term used to describe the heat given off by an engine that has been running?
A. Operating temperature
B. Intake air temperature
C. Engine temperature
D. Cylinder temperature
E. Exhaust gas temperature
38: What is the main feature of the engine that affects its temperature?
A. Fuel
B. Air
C. Cylinder
39: What is the name of the point on the piston's travel path at which the cylinder is at its highest point?
A. Midpoint of the Piston's Travel Path
B. Top Dead Center
C. Second Top Dead Center
D. Bottom Dead Center
40: What is the term for the position of the piston just before the top of the cylinder?
A. Topmost
B. Bottom Dead Center
C. Mid-stroke
D. Top Dead Center
41: What does "Top Dead Center" mean?
A. When the piston is in the middle of the cylinder
B. When the piston is at the bottom of the cylinder
C. When the piston is at the top of the cylinder
D. When the gun is pointed in the ground
E. When the firing pin is resting on an empty chamber
42: What is the generally expressed in microseconds?
A. Battery voltage
B. Injection pressure
C. Injection duration
D. Injection time
E. Motor speed
43: What is the unit of measure for injection duration?
A. Milliseconds
B. Minutes
C. Seconds
D. Microseconds
E. Hours
44: What is the name of the volume of the combustion chamber when the piston is at TDC?
A. Exhaust Port Volume
B. Intake Port Volume
C. Clearance Volume
D. Exhaust Volume
E. Intake Volume
45: What is the value of Clearance Volume in cubic centimetres at the top of its range?
A. Volume of the combustion chamber
B. Volume of the intake manifold
C. Volume of the turbocharger
D. Volume of the exhaust manifold
46: What is the swept volume between TDC and BDC?
A. Volume of the combustion chamber
B. Volume of the cylinder
C. Volume of the air/fuel mixture
D. Volume of the piston
47: How many times between TDC and BDC is the cylinder volume?
A. Cylinder head volume
B. Piston displacement
C. Exhaust gas recirculation volume
D. In-cylinder volume
E. Swept volume
48: What is the A/F ratio of stoichiometry?
A. 0.8
B. 0.6
C. 1.0
D. 3.0
E. 2.0
49: What is A/F ratio defined as?
A. Volumetric Air/Fuel ratio
B. Relative Air/Fuel ratio
C. Fuelling efficiency
D. Absolute Air/Fuel ratio
50: What is the value at which the rate of A/F approaches stoichiometry?
A. ∞
B. Λ
C. 1
D. 0
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Combustion MCQs
Вопросы о горении на русском языке
Preguntas de combustión en idiomas españoles
日本語での燃焼に関する質問
Domande sulla combustione in lingua italiana
Questions de combustion en langues françaises
Questões de combustão em línguas portuguesas
Verbrennungsfragen in deutschen Sprachen
中文（简体）语言的燃烧问题
أسئلة الاحتراق باللغات العربية
Soal pembakaran dalam bahasa indonesia
Türkçe dillerinde yakma soruları
