2nd Semester Multiple Choice Questions for D/MECH

II nd Semester Multiple Choice Questions for D/MECH

1. A 4-stroke produces one power stroke in

            (a) 2 revolutions of crankshaft         (b) 4 revolutions of crankshaft
            (c) 6 revolutions of crankshaft        (d) 8 revolutions of crankshaft
Ans: a

     2.   A 2-stroke cycle engine produces one power stroke in
               (a) each revolution of crankshaft                 (b) 2 revolutions of crankshaft
               (c) 3 revolutions of crankshaft                    (d) 4revolutions of crankshaft
Ans: a

   3. Which one of the following gives the correct position of inlet and exhaust valves during the                powerstroke?
            (a) inlet valve opens and exhaust valve closes    (b) exhaust valve opens and inlet valve closes
            (c) both valvesremain in closed position             (d) both valves remain in open position

Ans: c

  4.  An engine has a clearance volume of 100 cm³ and a swept volume of 800 cm³. The compression
       ratio is
             (a) 10:1                  (b) 9:1 
             (c) 8:1                    (d) 7:1

Ans: b  

  5.  Which one of the following engine components 􀍚carries􀍛 the engine over its non-working          strokes?
        (a) piston                          (b) crankshaft
       (c) connecting rod            (d) flywheel

Ans: d

 6. A two-stroke engine has ports in the
     (a) piston                (b) cylinder walls
    (c) piston rings       (d) crankcase

Ans: b

7. During suction stroke the charge drawn in a petrol engine is
    (a) petrol only                          (b) air only
    (c) air and petrol mixture       (d) none of the above

Ans: c

8.  In a diesel engine, fuel and air mix together in the

    (a) carburettor                    (b) injector
    (c) combustion chamber    (d) inlet port

Ans: c

9. The two firing orders used on four-cylinder in-line engines are
     (a) 1 3 4 2 and 1 4 2 3      (b) 1 4 2 3 and 1 3 2 4
     (c) 1 3 2 4 and 1 2 4 3      (d) 1 2 4 3 and 1 3 4 2

Ans: d

10. Which one of the following parts of diesel engine fuel tank is responsible for minimizing the
slushing of fuel due to movement inside the tank?
    (a) Filler cap                  (b) filler neck
     (c) drain plug                (d) baffles

Ans: d

11.What is the meaning of CNG?
     a) Compressed natural gas              (b)Compressed Nitrogen gas
     c)Carbon neutral gas                        (d)None of these

Ans:a 
12.Which of the following is made of Aluminium alloy?
    a) Piston Ring               (b) Piston
    c)Connecting rod           (d)Crank shaft

IC ENGINE WORKING

COMPONENTS OF IC ENGINE

THE MICROMETER

                                THE MICROMETER

The micrometer is a precision measuring instrument, used by engineers. Each revolution of the rachet moves the spindle face 0.5mm towards the anvil face. The object to be measured is placed between the anvil face and the spindle face. The rachet is turned clockwise until the object is ‘trapped’ between these two surfaces  and the rachet makes a ‘clicking’ noise. This means that the rachet cannot be tightened any more and the measurement can be read.

Model Questions Workshop Calculation (Semester-1)

MODEL EXAMINATION JANUARY 2018
(D/Mechanic,Fitter Jr,D/Civil Jr)

WORKSHOP CALCULATION

                                       

1. 10 gallons = …….. L

a)4.546  b)45.46  c)454.6 d) 4546.4

Ans:b

2. π radians = ……… degrees

a)90  b)45  c)180   d)270

Ans:c

3.In SI system  1 HP = …….W

a)746   b)756  c)768   d)736

Ans: a

4.0.02×50 = ……..

a)1 b)0.001 c 10 d .01

Ans: a

5.The value of (1+0.1+0.01+0.001) is ……..

a)1.001 b) 1.011 c)1.003 d)1.111

Ans: d

6.How many pieces of 85cm length can be cut from a rod 42.5m long?

a)30   b)40   c)60   d)None of these

Ans: d

7.5005-5000÷500 = …….

a)4905 b) 4995 c)0.5  d)4895

Ans: b

8.The difference between a number and its three fifth is 40.The number is ………

a)20b)40  c)60 d)100

Ans: d

9.What is 50% of  Rs 35?

a)17.5   b)70   c)40   d)85

Ans: a

10.How many litres of pure acid  is present in 8L of a 20% acidic solution?

a)1.4   b) 1.5 c) 1.6 d)2.4

Ans: c

11.The square root of 0.09 is …...

a) 0.03   b) 0.3   c)0.99   d)0.6

Ans: b

12.7589 - ? = 3434

a)4242  b)4155  c)1123  d)11023

Ans: b

.

13. 75:x::5:8.Find x?

a)112   b)120   c)125   d)130

Ans: b

14.If 36 trainee can do an assembly in 25 hours,in how many hours 15 trainees can do the same work?

a)50   b)60   c)70   d)80

Ans: b

15.Specific gravity of water is ……

a)1   b)2   c)3   d)4

Ans: a

16.A car moves with a speed of 80km/hr.The speed of the car in m/s is ……

a)8   b)20.11  c)22.22  d)None

Ans: c

17.A train running at 60km/hr crosses a pole in 9sec.The length of the train is …...metres?

a)120 b)180 c) 324 d)None of these

Ans: d

18.The value of mass is………everywhere

a)Constant   b)Different   c)Both a & b   d)None

Ans: a

19.In a hydel power plant, ……….. energy is converted into ………. energy

a)potential , kinetic  b)potential,electrical  c)kinetic, electrical   d)potential,thermal

Ans: b

20.The mass of 50 mL of water =

a)50kg b)50g c)50mg d)500mg

Ans: b

21.Speed is a …….quantity

a)Scalar   b)Vector   c)Tensor   d)None

Ans: a

22.A pump can raise 100L of water through a height of 200m in one minute.The Work done by it in 5 hours will be………

a)500000 kJ   b)600000 kJ   c)700000 kJ   d)None

Ans: b

23.A mass of 5g moves with a constant velocity of 500m/s.Its kinetic energy is …….. J

a)625   b)62.5   c)6.25    d)6250

Ans: a

24.Ice floats on water because

a)Ice has higher density     b)Ice has lower density

c)Ice occupies more space d)Ice has higher specific gravity

Ans: b

25.Brass is an alloy of

a)Copper and Zinc   b)Copper and Tin   c)Tin and lead  d)None

Ans: a

Employability Skills Previous Questions -(Semester 1 )

ANSWER KEY OF MODEL EXAM -MECHANIC DIESEL

ANSWER KEY  - MECHANIC DIESEL - Trade Theory

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

NCVT Previous Question Papers (Draughtsman /Civil)

Theory Semester -1 (1/2/2017)

OBJECTIVE QUESTIONS FOR D/MECH FIRST SEMESTER EXAMINATION

D/MECH OBJECTIVE QUESTIONS

1. An accident is
(a)Unplanned event (b) non-controlled event (c) undesirable event (d) all of the above
Ans: d
2. Which one of the following is not the cost due to an accident?
(a)cost due to damage to machine, tools, material and property (b) cost of lost time of the injured
person (c) cost of compensation and medical aid (d) cost due to increase in production
Ans: d
3. The safe away of working is
(a) an effective and right way of working (b) an ancient way of working (c) a way of handling the work
in a hurry (d) a way of normal working
Ans: a
4. The best way of avoiding accident is by
(a) doing work in accident way 􀍾b􀍿 doing work in one􀍛s own way (c) observing safety rules related to job,
machine and work place (d) using safety equipment
Ans: c
5. In case of an accident, the victim should immediately be
(a) asked to take rest (b) enquired about the accident (c) attended to immediately (d) left to himself
without treatment
Ans: c
6. An oily floor should be cleaned by
(a) cotton waste (b) putting water (c) putting saw dust (d) spraying carbon dioxide or sand
Ans: c
7. Fire is a combination of
(a) fuel, light and oxygen (b) fuel, heat and oxygen (c) fuel, heat and carbon dioxide (d)
fuel, light and nitrogen
Ans: b
8. In case of arc welding, one should protect his eyes by
(a) dark glass screen (b) sun goggles (c) mask (d) clear glasses
Ans: a
9. While grinding one must use
(a) dark glass screen (b) mask (c) safety goggles (d) sun goggles
Ans: c
10. A hammer with loosely fitted handle will
(a) fly away and cause accident (b) absorb shock (c) have easy swing (d) convey more leverage
Ans: a
11. Emission norms are the levels of pollutants permitted for emission by a vehicle. The emission
emitted by a petrol engine are measured by
(a) gas detector (b) gas analyser (c) gas meter (d) gas igniter
Ans: b

12. What is determined while measuring a component?

(a) nominal size (b) actual size (c) specified size (d) scale size

Ans: b

13. Which of the following instruments is used for checking flatness and squareness of a surface?

(a) try square (b) vernier height gauge (c) slip gauge (d) bevel gauge

Ans: a

14. Which is NOT the use of a try square?

(a) measuring right angle (b) checking squareness (c) making straight lines at 90ᴼ against an edge

(d) setting workpiece at 90ᴼ

Ans: a

15. The minimum measurement that can be read with the help of a steel rule is

(a) 0.01 mm (b) 0.02 mm (c) 0.05 mm (d) 0.50 mm

Ans: d

16. Try square is used to check up an angle of

(a) 30ᴼ (b) 45ᴼ (c) 60ᴼ (d) 90ᴼ

Ans: d

17. In a metric micrometer, a complete revolution of thimble advances

(a) 0.01 mm (b) 0.25 mm (c) 0.50 (d) 1.00 mm

Ans: c

18. The least count of vernier bevel protractor is

(a) 1´ (b) 5´ (c) 10´ (d) 25´

Ans: b

19. The least count of a metric micrometer is

(a) 0.01 mm (b) 0.05 mm (c) 0.10 mm (d) 0.50 mm

Ans: a

20. An outside micrometer has a negative error. The correct reading can be taken by

(a) adding the negative error in the actual reading (b) deducting the negative error from the actual reading

(c) adding twice the negative error in the actual reading (d) deducting twice the negative error from the

actual reading

Ans: a

21. Which one of the following instruments is used to check the concentricity of the outside diameter?

(a) vernier calliper (b) outside micrometer (c) dial test indicator (d) dial calliper

Ans: c

22. Zero error in micrometer means

(a) there is negligible gap between the spindle and the anvil (b) micrometer is true (c) zero mark

on the thimble is not visible (d) zero on thimble and datum line on sleeve do not coincide when measuring

faces are in contact

Ans: d

23. Which one of the following instrument is used to measure accurately the angle of tapper?

(a) bevel gauge (b) bevel protractor (c) vernier bevel protractor (d) tapper gauge

Ans: c

24. The least count of vernier calliper is

(a) 0.10 mm (b) 0.01 mm (c) 0.05 mm (d) 0.02 mm

Ans: d

25. Ratchet stop is the micrometer helps to

(a) control the pressure (b) lock the spindle (c) adjust zero error (d) hold the workpiece

Ans: a

26. A micrometer has a positive error of 0.02 mm. What is the correct reading when the micrometer

measures 40.53 mm?

(a) 25.39 mm (b) 25037 mm (c) 25.43 mm (d) 25.45 mm

Ans: a

27. A micrometer has a negative error of 0.03 mm. What is the correct reading when the micrometer

measures 40.53 mm?

(a) 40.50 mm (b) 40056 mm (c) 40.46 mm (d) 40.59 mm

Ans: b

28. The zero graduation of the thimble division of an outside micrometer is below the datum line, when

the measuring faces of the micrometer are in contact, the error is

(a) negative (b) positive (c) zero (d) none

Ans: a

29. Vernier depth gauge is used to measuring

(a) external dimensions (b) internal dimensions (c) step, depth of blind hole (d) pitch diameter

Ans: c

Which of the following statement is correct?

(a) gauges are used to check the size (b) templates are used to check the size (c) gauges are used to measure

size (d) gauges are used to check the shape of components

Ans: a

30. A feeler gauge is used for

(a) adjusting the parts for play (b) checking the gap between mating parts (c) checking radii of job (d)

checking accuracy of hole

Ans: b

31. Centre gauge is used for

(a) setting the lathe tool at correct centre height (b) checking the pitch of thread (c) checking the fit of

thread (d) checking the profile of thread

Ans: a

32. Gauges are made of

(a) cast iron (b) cast steel (c) alloy steel (d) mild steel

Ans: c

33. Thread ring gauge is used for checking

(a) external threads (b) internal threads (c) external diameter of cylindrical jobs (d) internal diameter of

jobs

Ans: a

34. Which one of the following gauges is used for checking cylinders, which are not kept in vertical or

horizontal position?

(a) plug gauge (b) ring gauge (c) snap gauge (d) pilot gauge

Ans: d

35. Clearance between mating parts is measured by

(a) dial gauge 􀍾b􀍿 􀍞Go􀍟 gauge (c) feeler gauge (d) calliper gauge

Ans: c

36. A sine bar is available in standard sizes. Which one of the following is NOT a standard size of the

sine bar?

(a) 100 mm (b) 200 mm (c) 250 mm (d) 300 mm

Ans: d

37. The piston of a tire pressure gauge is made of

(a) cast iron (b) aluminium (c) plastic (d) soft rubber

Ans: d

38. The tool, which is used for laying out large circles is

(a) trammel (b) divider (c) jenny calliper (d) scriber

Ans: a

39. The point angle of scriber is

(a) 30° (b) 60° (c) 5° to 10° (d) 12° to 15°

Ans: d

40. The point angle of centre punch is

(a) 30° (b) 60° (c) 90° (d) 120°

Ans: c

41. During marking, the reference surface is provided by

(a) sketch of the job (b) workpiece (c) marking off table surface (d) surface gauge

Ans: c

42. A divider is used for

(a) scribing circles (b) scribing arcs (c) transferring and stepping distances (d) all of the above

Ans: d

43. Scriber is made of

(a) copper (b) high carbon steel (c) mild steel (d) cast iron

Ans: b

44. What type of threads are suitable for small precision components and measuring gauges?

(a) british association threads (b) whitworth screw threads (c) acme threads (d) square threads

Ans: a

45. What type of threads are suitable for the lead screws of machine tools?

(a) british association threads (b) whitworth screw threads (c) acme threads (d) square threads

Ans: c

46. Which one of the following screw thread forms has an included angle of 29° between the flanks of

threads?

(a) B.A. thread (b) acme thread (c) buttress thread (d) knuckle thread

Ans: b

47. The pitch diameter of the external screw thread is checked by

(a) screw pitch gauge (b) thread ring gauge (c) screw thread micrometer (d) vernier calliper

Ans: c

48. A key is subjected to

(a) shear stress (b) compressive stress (c) tensile stress(d) twisting stress

Ans: a

49. Which one of the following keys is used on automobile shaft?

(a) gib head key (b) taper key (c) woodruff key (d) hollow saddle key

Ans: c

50. Which type of key is used for coupling a pulley with a shaft?

(a) square threads (b) woodruff key (c) gib head key (d) flat saddle key

Ans: c

51. The upper portion of a hexagonal nut is chamfered at an angle of

(a) 75° (b) 60° (c) 45° (d) 30°

Ans: d

52. The dimension of a nut is expressed in term of

(a) head of the bolt (b) nominal diameter of the bolt (c) core diameter of the bolt (d) pitch diameter of the bolt

Ans: b

53. Which one of the following thread forms is used in a threaded assembly where the sliding force acts

in one direction only?

(a) square thread (b) 􀇮V􀇯 thread (c) saw-tooth thread (d) knuckle thread

Ans: c

54. A rivet is specified by the diameter of its

(a) head (b) tail (c) shank (d) none of the above

Ans: c

55. B.S.F. screw threads have the included angle of

(a) 30° (b) 45° (c) 55° (d) 60°

Ans: c

56. The shape of a woodruff key is

(a) round with tapper (b) in the form of a segment of a circle (c) rectangular (d) square with taper

Ans: b

57. For fitting a saddle key

(A) no keyway is cut on the shaft (b) long keyway is cut on the shaft (c) the key is fitted by means of crews (d) the lower portion of the key is machined in a curved form

Ans: a

58. A key is a device used to

(a) fasten the mating parts (b) start the machine (c) stop the machine (d) control the machine

Ans: a

59. Which one of the following threads, is used on mechanical jack?

(a) acme (b) square (c) buttress (d) B.S.F.

Ans: b

60. A nut having raised height and slots on the raised portion is called

(a) sawn nut (b) slotted nut (c) castle nut (d) pin hole nut

Ans: c

61. Which one of the following thread forms on bolts and nuts is meant for general fastening purposes?

(a) 􀇮V􀇯 thread (b) square threads (c) knuckle threads (d) acme threads

Ans: a

62. Spring washers are used under nuts to prevent

(a) damage to be bolt (b) damage to the nut (c) damage to the job (d) slackness of nuts due to vibrations

Ans: d

63. A tab washer is used for

(a) self-locking (b) locking the nuts (c) avoiding vibration (d) fastening vibration work

Ans: c

64. A plane washer helps to

(a) distribute the force over a large area (b) distribute the force to the nut (c) cover the clearance hole of the job (d) improve appearance of the job

Ans: a

65. Which one of the following reasons is responsible for crushing of metal in the riveted point?

(a) thickness of plates is more (b) thickness of plates is less (c) diameter of rivet is too large (d) diameter of rivet is too small

Ans: c

66. Which one of the following reason is responsible for shearing of rivet in a riveted joint?

(a) diameter of the rivet is too small (b) diameter of the rivet is too large (c) thickness of plates vary (d)pitch of the holes is too small

Ans: a

67.The cutting action of a file depends upon

(a) the kind of cut and spacing of teeth (b) arrangement of teeth on the file (c) size and shape of the file

(d) all of the above

Ans: d

68. Hacksaw blade teeth get dull due to

(a) high speed and pressure (b) pressure not released during return stroke (c) coolant not used (d) any one of the above

Ans: d

69. Which one of the following is NOT the reason for making file faces slightly convex in form?

(a) to increase the friction between the file face and the job surface (b) to give better distribution of the pressure and to compensate slight filing movement. (c) to reduce the friction between the file face and the job surface. (d) to reduce the effort in driving a file.

Ans: a

70. Which one of the following designations does NOT denote the grade of a file?

(a) bastard (b) first cut (c) second cut (d) smooth

Ans: b

71. A double cut file is used for filing on

(a) wood (b) hard board (c) leather (d) steel

Ans: d

72. Second cut in a file is the type of

(a) section (b) grade (c) cut (d) design

Ans: b

73. The body of a flat chisel is usually made in the shape of

(a) rectangular (b) square (c) hexagonal (d) octagonal

Ans: d

74. The chisel used to cut keyways is

(a) cape chisel (b) flat chisel (c) round nose chisel (d) diamond point chisel

Ans: a

75. Both sides of a flat bastard file have

(a) no cut (b) single cut teeth (c) double cut teeth (d) wavy teeth

Ans: c

76. The length of hacksaw blade is measured from

(a) one end of the toothed portion to the other end (b) centre of one pin hole to the centre of other pinhole

(c) end to end of blade (d) end of one hole to the end of the other pin hole

Ans: b

77. The new hacksaw blade should not be used in the blind saw cut made by old blade because

(a) the space is not enough to run the blade (b) the blade is costly (c) the new blade has sharp teeth

(d) none of the above

Ans: a

78. The safe edge of file is used to

(a) give best finishing (b) protect the adjacent sides (c) finish flat surfaces only (d) cut metal very

quickly

Ans: b

79. File card is used for

(a) cleaning the work piece (b) cleaning the file teeth (c) renewing the file teeth (d) cleaning the

chips

Ans: b

80. Setting of teeth in hacksaw blade is

(a) not required (b) required to avoid friction between the blade and work piece (c) required for

increasing the strength of blade (d) required for providing teeth on the blade

Ans: b

81. Which one of the following materials is used for making a grinding wheel?

(a) silicon carbide (b) granite (c) sand (d) calcium carbonate

Ans: a

82. A slight convexity is made on the cutting edges of flat chisel for

(a) cutting sharp corners. (b) allowing lubricant to reach the cutting edge. (c) cutting curved surfaces.

(d) preventing digging of the ends of cutting edge.

Ans: d

83. While chipping, the clearance angle is the angle between

(a) the working surface of the job and the top surface of cutting edge of chisel (b) the working surface of the job and the bottom surface of cutting edge of chiseljob (c) the surface at right angle to the cutting edge of chisel and the workig surface of the (d) none of the above

Ans: b

84. The most suitable pitch of the hacksaw blade of cutting thin section tubes is

(a) 0.8 mm (b) 1.0 mm (c) 1.4 mm (d) 1.8 mm

Ans: a

85. The suitable pitch of hacksaw for cutting solid brass is

(a) 0.8 mm (b) 1.0 mm (c) 1.4 mm (d) 1.8 mm

Ans: d

86. The commonly used standard length of hacksaw blade is

(a) 100 mm (b) 150 mm (c) 200 mm (d) 250 mm

Ans: d

87. Which among the following is an artificial abrasive?

(a) aluminium oxide (b) emery (c) diamond (d) corundum

Ans: a

88 The difference between the maximum and the minimum sizes allowed in manufactured

components is called:

(a) clearance (b) allowance (c) tolerance (d) limit

Ans: c

89. The measured size of the dimension of a component is called

(a) basic size (b) nominal size (c) allowed size (d) actual size

Ans: d

90. Under the terminology of the IS system of limits the term tolerance is defied as the difference between the

(a) maximum limit and the basic size (b) minimum limit and the basic size (c) maximum limit and

minimum limit (d) actual size and basic size

Ans: c

91. The propose of normalizing is to

(a) Remove induced stresses (b) Improve machinability (c) Soften the steel (d) Increase the toughness and reduce brittleness

Ans: a

92. A carbon steel piece is heated just above 730◦C, maintained at that temperature for a few hours and then slowly cooled. What heat treatment process is carried out?

(a) Normalizing (b ) Case Hardening (c) hardening (d) Annealing

Ans: d

93.Heat treatment of metals is necessary

(a) To produce certain desired properties (b) To make good appearance on the component (c) To Increase strength of metal (d) To make the metal rust proof

Ans: a

94.What is the main purpose of annealing ?

(a) To improve mach inability (b) To improve magnetism (c)

To Increase Hardness (d) To Increase toughness

Ans: a

95.The unit of capacitance is

(a) ohm (b) mho (c) Siemens (d) farad

Ans: d

96. According to Ohm􀍛s low, which one of the following relationship is correct?

(a) V= I/R (b) R= V.I (c) I= V/R (d) I= V.R

Ans: c

97. The two popular semi conductor materials are

(a) gallium and indium (b) aluminium and antimony (c) germanium and silicon (d) arsenic and boron

Ans: c

98. The diode used for voltage regulation is

(a) rectifier diode (b) zener diode (c) signal diode (d) varicap diode

Ans: b

99. The principle applied in lead-acid battery used in vehicle is called

(a) electrosynthesis (b) electrolysis (c) electroplating (d) electroenergy

Ans: b

100. A 4-stroke produces one power stroke in

(a) 2 revolutions of crankshaft (b) 4 revolutions of crankshaft (c) 6 revolutions of crankshaft (d) 8 revolutions of crankshaft

Ans: a

101. A 2-stroke cycle engine produces one power stroke in

(a) each revolution of crankshaft (b) 2 revolutions of crankshaft (c) 3 revolutions of crankshaft (d) 4 revolutions of crankshaft

Ans: a

102. Which one of the following gives the correct position of inlet and exhaust valves during the power stroke?

(a) inlet valve opens and exhaust valve closes (b) exhaust valve opens and inlet valve closes (c) both valves remain in closed position (d) both valves remain in open position

Ans: c

103. In an engine stroke length is

(a) half the throw of crank (b) equal to throw of crank (c) double the throw of crank (d) three times the throw of crank

Ans: c

104. The stroke of an engine is

(a) inside diameter of the cylinder (b) distance between TDC and BDC (c) volume of the cylinder (d) length of the connecting rod

Ans: b

105. Which one of the following engine components 􀍚carries􀍛 the engine over its non-working strokes?

(a) piston (b) crankshaft (c) connecting rod (d) flywheel

Ans: d

106. Air-fuel mixture in a petrol engine is burnt in

(a) intake manifold (b) exhaust manifold (c) cylinder (d) piston

Ans: c

107. What is drawn in the cylinder of diesel engine during suction stroke?

(a) a mixture of air and fuel (b) pure air alone (c) fuel alone (d) gas

Ans: b

108. In a diesel engine, fuel and air mix together in the

(a) carburettor (b) injector (c) combustion chamber (d) inlet port

Ans: c

109. In diesel engine, the fuel is ignited by

(a) a glow plug (b) a spark plug (c) an injector (d) virtue of temperature of compressed air

Ans: d

110. What is compressed in the cylinder of a diesel engine during the compression stroke?

(a) diesel fuel (b) pure air (c) air-fuel mixture (d) petrol

Ans: b

VERNIER CALLIPERS

TR = MSR+(VSRx L.C)