OBJECTIVE QUESTION - ADVANCE IC ENGINE(ME6016) - UNIT 1 - SPARK IGNITION ENGINE

MCQ
ADVANCED IC ENGINE
UNIT 1 – SPARK IGNITION ENGINE
BY
DR. T. MOTHILAL
Mothilal,ProfessorinMechanicalDepartment

1. WHAT IS THE STOICHIOMETRIC AIR FUEL
RATIO FOR SI ENGINE
A. 10:1
B. 8:1
C. 14:1
D. 14.7:1
Mothilal,ProfessorinMechanical
Department

2. IS REQUIRE TO COMPENSATE FOR CHARGE
DILUTION DUE TO EXHAUST GASES FROM
COMBUSTION CHAMBER
A. Rich mixture
B. Lean mixture
C. Moderate mixture
D. Stoichiometric mixture
Department

3. WHICH OF FOLLOWING OPTION BELONGS
TO MIXTURE RANGE?
A. Idling range
B. Crusing range
C. High power range
D. All the above
Department

4. PREVENTS OVERHEATING BY REDUCING THE
FLAME TEMPERATURE AND CYLINDER
TEMPERATURE?
A. Rich mixture
B. Lean mixture
C. Moderate mixture
D. Stoichiometric mixture
Department

5. THE THERMAL EFFICIENCY OF TWO STROKE
CYCLE ENGINE IS.....A FOUR STROKE CYCLE
ENGINE
 Equal to
 Less than
 Greater than
 None of the above
Department

6. A TWO STROKE CYCLE ENGINE GIVES......THE
NUMBER OF POWER STROKES AS COMPARED TO
THE FOUR STROKE CYCLE ENGINE,AT THE SAME
ENGINE SPEED.
 a)Half
 b)Same
 c)Double
 d)Four times
Department

7. IF THE INTAKE AIR TEMPERATURE OF I.C. ENGINE
INCREASES, ITS EFFICIENCY WILL
 a)Increase
 b)Decreases
 c)Remain same
 d)Unpredictable
Department

8. THE SPECIFIC FUEL CONSUMPTION FOR A
PETROL ENGINE FIRST DECREASES WITH INCREASE
IN FUEL AIR RATIO AND THEN INCREASES WITH
FURTHER INCREASE IN AIR FUEL RATIO. THE
MAXIMUM VALUE OCCURS IN THE RANGE OF
 a) lean mixture.
 b) chemically correct mixture
 c) rich mixture.
 d) none of the mentioned
Department

9. A MIXTURE OF THEORETICAL AIR AND FUEL
FOR COMPLETE COMBUSTION IS
 a)Rich mixture
 b)Lean mixture
 c)Air-fuel mixture
 d)Stoichiometric mixture
Department

10. MIXTURE STRENGTH IS DEFINED AS THE
RATIO OF
 a)Stoichiometric ratio/Actual ratio
 b)Stoichiometric ratio/Theoretical ratio
 c)Actual Ratio/Stoichiometric ratio
 d)Theoretical ratio/Stoichiometric ratio
Department

11. THE ENGINE WHICH WORK FOR VERY
LEAN MIXTURE OF FUEL
 a)spark ignition
 b)compression ignition
 c)both a and b
 d)none of the above
Department

12. DURING IDLING, A PETROL ENGINE
REQUIRES WHICH TYPE OF MIXTURE
 a)lean
 b)rich
 c)chemically correct
 d)none of the mentioned
Department

13. THE MOST EFFECTIVE AIR CLEANER IN
CASE OF DIESEL ENGINE IS
 a)dry type
 b)wet type
 c)whirl type
 d)oil bath type
Department

14. A HIGH FLAME SPEED IS OBTAINED IN
DIESEL ENGINES WHEN AIR FUEL RATIO IS
 a)uniform throughout the mixture
 b)chemically correct
 c)about 3-5% rich mixture
 d) about 10% rich mixture
Department

15. AIR INJECTED IN IC ENGINES REFERS TO
INJECTION OF
 a) air only
 b) liquid fuel only
 c) liquid fuel and air
Department

16. METHODS USED ON FUEL INJECTION
SYSTEM :
 A) Air injection
 B) Solid fuel injection
 C) Mechanical injection
 D) All of the above
Department

17. THE BEGINNING AND END OF THE
INJECTION SHOULD BE SHARP
 A) True
 B) False
Department

18. IF ONE OR MORE NOZZLES ARE SPRAYING
CORRECTLY THEN _______OCCURS
 A) Dripping
 B) Misfiring
 C) Cold Firing
 D) None of the above
Department

19. TYPES OF MULTIPOINT FUEL INJECTION
SYSTEM
 A) Port injection
 B) throttle body injection
 C) All of the above
Department

20. IN PRE-CHAMBER AND SWIRL TYPE OF
COMBUSTION SYSTEM _____ IS USED
 A) Single hole injector
 B) Multi hole injector
 C) Long stem injector
 D) Pintle nozzle
Department

21. FUEL INJECTOR IS USED IN
 A)S.I. engine
 B)C.I. engine
 C)Gas engine
 D)None of the above
Department

22. THE MAIN FUNCTIONS OF A FUEL
INJECTION SYSTEM ARE
 A) Filter the fuel
 B) Time the fuel injection
 C) Break up the fuel to fine particles
 D) All the above
Department

23. THE MODERN FUEL INJECTION SYSTEM
ARE
 A) Common rail injection system
 B) Individual pump injection system
 C) Distributor system
 D) All the above
Department

24. AIR INJECTION SYSTEM IS LARGELY USED
THESE DAYS.
 A) True
 B) False
Department

25. A MULTI HOLE NOZZLE GIVES POOR
ATOMISATION.
 A) True
 B) False
Department

26. WHEN THE FUEL IS SUPPLIED BY THE
INJECTION PUMP, IT EXERTS SUFFICIENT FORCE
AGAINST THE SPRING
 a) nozzle valve
 b) throttle valve
 c) mechanical valve
Department

27. REMOVAL OF AIR FROM THE PIPELINE IS
TERMED AS ____________ IN INJECTION SYSTEM.
 a) bleeding
 b) wound
 c) sweating
Department

28. _______________ IS USED TO ENABLE COLD
STARTING, WITH OUT THE USE OF A HEATER PLUG.
 a) Pintaux nozzle
 b) Multi hole injector
 c) Long stem injector
 d) Pintle nozzle
Department

29. BETTER ATOMIZATION AND _____________
WILL MAKE THE ENGINE LESS KNOCK PRONE.
 a) ignition
 b) vaporization
 c) condensation
Department

30. SOLID INJECTION IS ALSO CALLED
________________
 a) air injection
 b) mechanical injection
 c) compression fuel injection
Department

31. IN _____________ INJECTION SYSTEM ONLY
ONE PUMP IS SUFFICIENT FOR MULTI-CYLINDER
ENGINE.
 a) air
 b) mechanical
 c) compression fuel
 d) common rail
Department

32. MONOPOINT, MULTIPOINT AND DIRECT
INJECTION MULTI POINT FUEL INJECTION SYSTEM
USES
 a) manifold injection
 b) direct injection
 c) port injection and throttle body injection
 d) none of the above
Department

33. CONTINUOUS INJECTION SYSTEM USUALLY
HAS
 a) plunger pump
 b) rotary pump
 c) gear pump
 d) vane pump
Department

34. THE COLD INJECTOR USES RICH FUEL
MIXTURE
 A) true
 B) false
Department

35. THE MULTI-POINT FUEL INJECTION SYSTEM
CAN BE FUNCTIONALLY DIVIDED INTO
 a) electronic control system
 b) fuel system
 c) air induction system
 d) all of the mentioned
Department

36. MULTI-PORT FUEL INJECTION SYSTEMS
HAVE A FUEL INJECTOR FOR EACH CYLINDER,
USUALLY POSITIONED SO THAT THEY SPRAY
DIRECTLY AT WHAT?
 A)The intake valve
 B)The exhaust valve
 C)The piston
Department

37. THE AMOUNT OF TIME THE FUEL INJECTOR
STAYS OPEN IS CALLED WHAT?
 A)Pulse width
 B)Pulse height
 C)Pulse girth
Department

38. WHAT IS THE NAME OF THE SENSOR THAT
MONITORS THE PRESSURE OF THE AIR IN THE
INTAKE MANIFOLD?
 A)The mass airflow sensor
 B)The oxygen pressure sensor
 C)The manifold absolute pressure sensor
Department

39. IN MPFI-FUEL SYSTEM, THE THROTTLE
RECEIVE SIGNALS FROM THE ECU AND INJECT THE
FUEL INTO THE INTAKE MANIFOLD.
 A. True
 B. False
Department

40. ABNORMAL COMBUSTION KNOCK PRODUCED BY
SURFACE IGNITION IN SI ENGINES IS NOT HARMFUL
AS NORMAL COMBUSTION KNOCK.
 a) true
 b) false
Department

41. DETONATION IS PREVENTED BY PEAK
CYLINDER PRESSURE
 a) increasing
 b) decreasing
Department

42. IN NORMAL COMBUSTION, THE PISTON IS
ON ITS WAY UP THE CYLINDER TOWARD
 a) top dead center
 b) bottom dead center
Department

43. IGNITION OF THE FUEL-AIR MIXTURE BEFORE
THE SPARK BY SOME HOT OBJECT IN THE CYLINDER
 a) pre ignition
 b) knocking
Department

44. THE FREQUENCY OF FLASHING OF LIGHT PER
MINUTE IN A DIRECTION (SIDE TURN) INDICATOR IS
ABOUT
 a)9
 b)90
Department

45. THE DEGREE OF TURBULENCE INCREASES
_____________ WITH THE PISTON SPEED.
 a) indirectly
 b) directly
 c) linearly
Department

46. SWIRL RATIO IS DEFINED AS THE RATIO OF AIR
ROTATIONAL SPEED TO CRANKSHAFT ROTATIONAL
SPEED.
 a) True
 b) False
Department

47. ABNORMAL COMBUSTION KNOCK PRODUCED BY
SURFACE IGNITION IN SI ENGINES IS NOT HARMFUL
.AS NORMAL COMBUSTION KNOCK
 a) True
 b) False
Department

48. THE PROCESS OF AUTOIGNITION HAS
NOTHING TO DO TOWARDS ENGINE KNOCK.
 a) True
 b) False
Department

49. KNOCK IS LESS COMMON IN
____________ CLIMATES
 a) hot
 b) cold
 c) normal
Department

50. IF PETROL IS USED IN DIESEL ENGINE
 a) low power will produced
 b)Efficiency will low
 c)Higher knocking will occur
 d)Black smoke will be occur
Department

51. IN SI ENGINE, IGNITION LAG IS REDUCED IF THE
INITIAL TEMPERATURE AND PRESSURE ARE
 a) decreased
 b) increased
 c) constant
Department

52. DETONATION CAN BE SUPPRESSED BY
ADDITION OF SMALL QUANTITY .OF TETRAETHYL
LEAD.
 a) True
 b) False
Department

53. USE OF LOW OCTANE FUEL CAN
ELIMINATE DETONATION.
 a) True
 b) False
Department

54. THE KNOCKING IN SPARK IGNITION
ENGINES CAN BE REDUCED BY
 (A) Retarding the spark
 (B) Increasing the engine speed
 (C) Both (A) and (B)
Department

55. PICK THE ODD ONE OUT .
 a) Super charging.
 b) Decreasing load.
 c) Humidity of air.
 d) Spark plug location
Department

56. DUE TO SUPER CHARGING ,THE TEMPERATURE
INCREASE AND DENSITY DECREASES.
 a) True
 b) False
Department

57.THE EFFECTS OF KNOCKING ARE
 a) noise and roughness
 b) mechanical damage
 c) carbon deposits
Department

58. THE ANTIKNOCK PROPERTY OF FUEL
DEPENDS ON ITS
 (a)Self ignition temperature
 (b)Chemical composition
 (c)Molecular structure
 (d)All of these
Department

59. THE REFERENCE FUELS FOR KNOCK RATING OF
SPARK IGNITION ENGINES WOULD INCLUDE
 (a)iso-octane and alpha-methyl naphthalene
 (b)normal octane and aniline
 (c)iso-octane and normal hexane
 (d)normal heptane and iso-octane
Department

60. A PRE COMBUSTION CHAMBER GIVES SHORTER
DELAY COMPARED TO AN OPEN TYPE OF
COMBUSTION CHAMBER
 A) True
 B) False
Department

61. THE COMPLETE COMBUSTION OF ____MIXTURE
AND DROPLET COMBUSTION RESULTS IN SMOKE
AND ODOUR
 A) Hetrogeneous
 B) Homogeneous
 C) Solid
Department

62. WHICH OF THE FOLLOWING IS NOT AN
INTERNAL COMBUSTION (IC) ENGINE
 A) Gas engine
 B) Jet engine
 C) Wankel engine
 D) Stirling engine
Department

63. A PRE COMBUSTION CHAMBER IS
COMMONLY USED AUTOMOBILE:
 A) Gasoline engine
 B) Diesel engine
Department

64. THE SOURCE OF OXYGEN FOR
COMBUSTION OF FUEL IN AN ENGINE :
 A) Pure oxygen
 B) Air
 C) Carbon di oxide
 D) Nitrogen
Department

65. A FOUR-CYLINDER ENGINE HAS A CAPACITY OF
2.4 LITRES. THE SWEPT VOLUME OF ONE CYLINDER
IS
 a)400cm3
 b)600cm3
Department

66. SWIRL IS THE ROTATIONAL FLOW OF
CHARGE WITH IN THE CYLINDER AXIS
 a)True
 b)False
Department

67. THE EFFECTS OF KNOCKING ARE
 a) noise and roughness
 b) mechanical damage
 c) carbon deposits
Department

68. THE FLAME PROPAGATION VELOCITIES
RANGE FROM
 a) 10 to 15 m/s
 b) 15 to 70 m/s
 c) 20 to 80 m/s
 d) 30 to 90 m/s
Department

69. ____________ CONSISTS OF RANDOMLY
DISPERSED VORTICES OF DIFFERENT SIZES
WHICH BECOME SUPERIMPOSED INTO THE AIR
AND PETROL MIXTURE FLOW STREAM.
 a) Turbulence
 b) Swirl
 c) Quench area
 d) None of the mentioned
Department

70. TURBULENCE DECREASES THE HEAT FLOW TO
THE CYLINDER WALL AND IN THE LIMIT EXCESSIVE
TURBULENCE MAY EXTINGUISH THE FLAME.
 a) True
 b) False
Department

71. THE FUEL CONSUMPTION IS LEAST IN
 A)Idling range
 B)No load running
 C)Cruising range
 D)High power range
Department

72. THE DIFFERENCE OF LEVEL OF TIP OF MAIN
NOZZLE AND FUEL LEVEL IN FLOAT CHAMBER OF A
SIMPLE CARBURATOR
 A) Nozzle lip
 B) Nozzle dip
 C) Throttle lip
 D) Throttle dib
Department

73. THE FOLLOWING IS (ARE) THE MODERN
CARBURETORS USED IN AUTOMOBILES
 A)Solex carburetor
 B)Cartex carburetor
 C)S.U. Carburetor
 D)All of the above
Department

74. WHICH INJECTION SYSTEM IS SUFFICIENT TO
USE ONLY ONE PUMP FOR MULTI-CYLINDER ENGINE.
 a) air
 b) mechanical
 c) compression fuel
 d) common rail
Department

75. COMMONLY USED INJECTION SYSTEM IN
AUTOMOBILES IS
 a) air injection
 b) solid injection
 c) combination of (a) and (b)
Department

76. THE MOST ACCURATE GASOLINE
INJECTION SYSTEM IS
 a) direct injection
 b) port injection
 c) throttle body injection
 d) manifold injection
Department

77. THE DEGREE OF TURBULENE INCREASES
WITH THE PISTON SPEED
 a)indirectly
b)Directly
 c)Linearly
 d)Non of the mentioned
Department

78. THE FLAME PROPAGATION VELOCITIES
RANGE FROM
 a)10 to 15 m/s
 b)15 to 70 m/s
 c)20 to 80 m/s
 d)30 to 90 m/s
Department

79. ____________ IS A CHEMICAL REACTION IN
WHICH CERTAIN ELEMENTS OF THE FUEL LIKE
HYDROGEN AND CARBON COMBINE WITH OXYGEN
LIBERATING HEAT ENERGY AND CAUSING AN
INCREASE IN TEMPERATURE OF THE GASES.
 a) Compression
 b) Expansion
 c) Combustion
 d) None of the mentioned
Department

80. THE COMPLETE COMBUSTION OF
____________ MIXTURE, AND DROPLET
COMBUSTION RESULT IN THE SMOKE AND
ODOUR.
 a) heterogeneous
 b) homogeneous
 c) Solid
Department

81. IN FOUR STROKE ENGINE THERE IS ONE
POWER STROKE IN _____ OF CRANKSHAFT
ROTATION.
 a)180°
 b.)360°
 c.)540°
 d.)720°
Department

82. DECREASE IN KNOCKING PROPERTY IS
_________
 a) Anti knocking property
 b) scavenging
 c) Ignition delay
 d) Complete combustion
Department

83. HOW TO DECREASE KNOCKING IN PETROL
ENGINE?
 a) By octane number
 b) Cetane number
 c) Compression ratio
 d) Air - fuel ratio
Department

84. LIGHT DIESEL WITH SHORT IGNITION DELAY AND
ADDITIVES WILL BE THE FINAL CHOICE TO HAVE ?
 a) Maximum knocking
 b) Minimum Knocking
 c) zero Knocking
 d) None of these
Department

85. CETANE NUMBER OF DIESEL HAS THE
RANGE OF
 a) 30 to 40
 b) 35 to 45
 c) 40 to 50
 d) 50 to 60
Department

86. THE OCTANE NUMBER CAN BE IMPROVED WITH
LITTLE ADDITION OF ________
 a) Tetraethyl lead (TEL)
 b) Methy Oxide
 c) Acetone
 d) Phenyl chloride
Department

87. PETROL IS _________
 a) C8 H15
 b) C4 H16
 c) C6 H14
 d) None of these
Department

88. THE DEGREE OF TURBULENCE INCREASES
_____________ WITH THE PISTON SPEED.
 a) indirectly
 b) directly
 c) linearly
 d) none of the mentione
Department

89. THE MEAN EFFECTIVE PRESSURE OBTAINED
FROM ENGINE INDICATOR INDICATES THE
 A) Maximum pressure developed
 (B) Minimum pressure
 (C) Instantaneous pressure at any instant
 (D) Average pressure
Department

90. IN A FOUR STROKE CYCLE PETROL
ENGINE, THE COMPRESSION
 (A) Starts at 40° after bottom dead centre and ends
at 30° before top dead centre
 (B) Starts at 40° before bottom dead centre and
ends at 30° after bottom dead centre
 (C) Starts at bottom dead centre and ends at top
dead centre
 (D) May start and end anywher
Department

91. AN ENGINE INDICATOR IS USED TO
DETERMINE THE FOLLOWING
 A) Speed
 (B) Temperature
 (C) Volume of cylinder
 (D) m.e.p. and I.H.P
Department

92.THE FUELS IN ORDER OF DECREASING KNOCK
TENDENCY FOR SPARK IGNITION ENGINES ARE
 (A) Paraffin, aromatic, napthene
 (B) Paraffin, napthene, aromatic
 (C) Napthene, aromatics, paraffin
 (D) Napthene, paraffin, aromatic
Department

93.THE OPERATION OF FORCING ADDITIONAL AIR
UNDER PRESSURE INTO THE ENGINE CYLINDER IS
KNOWN AS
 A) Supercharging
 (B) Carburetion
 (C) Turbulence
 (D) Delay period
Department

94. THE SPARK IGNITION ENGINES ARE GOVERNED
BY
 A) Hit and miss governing
 (B) Qualitative governing
 (C) Quantitative governing
 (D) Combination of (B) and (C)
Department

95.BY HIGHER OCTANE NUMBER OF SPARK
IGNITION FUEL, IT IS MEANT THAT THE FUEL HAS
 (A) Higher heating value
 (B) Higher flash point
 (C) Lower volatility
 (D) Longer ignition delay
Department

96. IN A PETROL ENGINE, THE MIXTURE HAS
THE LOWEST PRESSURE AT THE
 (A) Beginning of suction stroke
 (B) End of suction stroke
 (C) End of compression stroke
 (D) None of these
Department

97.DEPENDING UPON THE NUMBER OF STROKE, IC
ENGINES CAN BE CLASSIFIED INTO
 a) Two stroke engine
 b)Four stroke engine
 c)Single stroke engine
 d) both a and b
 e) all the above
Department

98.THE AIR STANDARD CYCLE THAT DESCRIBES
THE FUNCTIONING OF AN SI ENGINE IS
 A)Brayton cycle
 B) Carnot cycle
 C)Diesel cycle
 D)Otto cycle
Department

99.IN AN IC ENGINE, THE RECIPROCATING TO
ROTARY MOTION CONVERSION IS DONE BY THE
COMBINATION OF A
 a)Cam and Follower
 b)Crankshaft and Connecting rod
 c)Ratchet and Pawl
 d)Rack and Pinion
Department

100.WHICH OF THE FOLLOWING ARE THE IDLE
STROKES IN A 4 STROKE IC ENGINE
 a) Intake
 b)Compression
 c)Exhaust
 d)all of the above
Department

Department

1- D 11 – B 21 – B 31 – D 41 – B
2 – A 12 – B 22 – D 32 – C 42 – A
3 – D 13 - D 23 – D 33 – B 43 – A
4 – A 14 - D 24 – B 34 – A 44 – A
5 – B 15 - C 25 - B 35 – D 45 – B
6 – C 16 - D 26 – A 36 – A 46 – A
7 – B 17 - A 27 – A 37 – A 47 – B
8 – A 18 - B 28 – A 38 – C 48 – B
9 – D 19 - C 29 – B 39 – B 49 – B
5910 – A 20 - D 30 – B 40 – B 50 – C
Department

51- A 61 – B 71 – C 81 – D 91 – D
52 – A 62 - D 72 – A 82 – A 92 – B
53 – B 63 – B 73 – D 83 – A 93 - A
54 – C 64 – B 74 – D 84 – B 94 – C
55 – B 65 – A 75 – B 85 – C 95 – D
56 – B 66 – A 76 – B 86 – B 96 – B
57 – A 67 – A 77 – B 87 – A 97 – D
58 – D 68 – A 78 – A 88 – B 98 –D
59 – D 69 – A 79 – C 89 – D 99 – B
60 – A 70 – B 80 – B 90 – A 100 – D
Department

I acknowledge all the final year mechanical
students for giving valuable suggestion
THANK YOU
Department

OBJECTIVE QUESTION - ADVANCE IC ENGINE(ME6016) - UNIT 1 - SPARK IGNITION ENGINE

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OBJECTIVE QUESTION - ADVANCE IC ENGINE(ME6016) - UNIT 1 - SPARK IGNITION ENGINE