Sunday 26 May 2019

२०१८ फ़ेब्रुअर्य एम्प्लोयबिलित्य स्किल्ल्स सेमेस्तेर १ इ ते इ म च क़ु


२०१८ फ़ेब्रुअर्य एम्प्लोयबिलित्य स्किल्ल्स  सेमेस्तेर १ इ ते इ म च क़ु


























2016 JULY MECHANIC DIESEL THEORY SEMESTER - II


2016 JULY MECHANIC DIESEL THEORY SEMESTER - II

1. Morse test can be conducted
for  ........
(a) Petrol engines
b) Diesel engines
c) Multi cylinder engines
d) All of these
Answer:- c) Multi cylinder engines


2. Which of the following is a unit
 of pressure?
a) Kg/cm²
b) gama
c) Pie
d) Newton
Answer:- a) Kg/cm²

3. During the suction stroke of a
diesel engine ........
a) Petrol injected
b) Diesel injected
c) Diesel and air supplied
d) Only air supplied
Answer:- d) Only air supplied


4. In an automobile engine,
the temperature of piston will
be more at the ................
a) Piston pin
b) Skirt of piston
c) Crown of piston
d) Piston rings
Answer:- c) Crown of piston


5. In the compression stroke
the piston moves from ........
a)T.D.C to B.D.C
b) B.D.C. to T.D.C
c) Below B.D.C.
d) Above T.D.C.
Answer:- b) B.D.C. to T.D.C


6. Piston slap in a cold engine is
due to ..........
a) Excessive ring gap
b) Excessive piston to bore clearance
c) Less piston working clearance
d) Excessive compression pressure
Answer:- b) Excessive piston to bore clearance

7. Heater plugs are used to warm up.......
a) Fuel pump  
b) Feed pump
c) Injector
d) Combustion chamber
Answer:- d) Combustion chamber


8. In one revolution of a 2-stroke
engine of crank shaft, the inlet
value opens ............
a) 1 Time
b) 2Times
c) 3 Times
d) 4 Times
Answer:- a) 1 Time

9. Piston is made of .................
a) Zinc Alloy
b) Aluminum Alloy
c)Copper Alloy
d) None of these
Answer:- b) Aluminum Alloy


10. The knocking in the diesel engine occurs due to -
a) Ignition advance
b) Ignition delay
c) Ignition hold
d) None of these
Answer:- b) Ignition delay


11. The Petrol Engine works on
the principle of ..........
a) Otto Cycle
b) Diesel Cycle
c) Pascal Cycle
d) None of these
Answer:- a) Otto Cycle


12. Turbo charger in a Diesel
Engine is normally driven by ........
a)Inlet Air
b) Exhaust Gases
(c) Lub oil pump
 d) None of these
Answer:- b) Exhaust Gases

13. Oil should be checked -
a) Before starting the engine
b) During running of engine
c) Within two minute after
     stopping the engine
d) None of the above
Answer:- a) Before starting the engine

14. A spark plug gap is kept between -
a)  0.2 to 0.8mm
b)  0.3 to 0.7mm
c)  0.4 to 0.9 mm
d)  0.6 to 1.0 mm
Answer:- a)  0.2 to 0.8mm

15. Tappet clearance adjustment is
       carried out when ............
a) Both the inlet and exhaust valves are
     in shut position
b) Only inlet valve is in shut position
c) Only exhaust valve is in shut position
d) All of above
Answer:- a) Both the inlet and exhaust
valves are in shut position

16. The lower portion of piston is called as -
a) Sleeve
b) Skirt
c) Piston Land
d) Grooves
Answer:- b) Skirt


17. The petrol air mixture at starting of
an engine needs to be ............
a)  Lean
b)  Pure petrol
(c) Same as for normal running
d)  Rich
Answer:- d) Rich


18. Which of the following has
      finished surface?
a)Wet Liner
b) Dry Liner
c) Both (a) &(b)
d) None of these
Answer:- b) Dry Liner


19. Piston diameter is...........than
cylinder diameter.
a) More
b) Less
c) Equal
d) None of these
Answer:- b) Less

20. Flywheel of a Diesel Engine
is made of ........
a) Wood
b) Aluminum
c) Brass
d) Steel
Answer:- d) Steel

21. Which of the following engine
power is more power?
a) Internal Combustion Engine
b) External Combustion Engine
c) Both (a) &(b)
d) None of these
Answer:- a) Internal Combustion Engine


22. Engine valves are mounted ......
a) On Cylinder Block or Cylinder Head
b) Inside the cylinder
c) On crank case
d) None of these
Answer:- a) On Cylinder Block or Cylinder Head

23. Which of the following is used for
housing of crank shaft and cam shaft?
a)  Crank case
b)  Cylinder lining
c)  Piston ring
d)  Piston pin
Answer:- a)Crank case

24. Radiator of the which of engine is
small in size -
a) Petrol Engine
b) Diesel Engine
c) Both (a) &(b)
d) None of these
Answer:- a) Petrol Engine

25. Which of the engine has lesser
compression ratio?
a) Petrol Engine
b) Diesel Engine
c) Both (a) &(b)
d) None of these
Answer:- a) Petrol Engine

26. Which of the following is the part
of fuel feed system?
a) Fuel tank
b) Fuel filter
c) Fuel gauge
d) All of these
Answer:- d) All of these

27. Engine valves are opened by ...........
a) Cam shaft
b) Crank shaft
c) Rocker Arm
d) Valve Guide
Answer:- a) Cam shaft

28. In a petrol engine, if diesel is used,
 then the engine will ...........
a) Not run
b) Run more efficiently
c) Run at high speed
d) Explode
Answer:- a) Not run

29. What will happen due to abnormal
wear of oil ring of a piston?
a) High oil viscosity
b) More oil consumption
c) High oil pressure
d) Low pump pressure
Answer:- b) More oil consumption

30. The purpose of providing drain
plug in Air compressor is ............
a) To drain out oil
b) To drain out condensed water
c) To drain out air
d) To drain out coolant
Answer:- b) To drain out condensed water

31. Excessive valve guide wear will
result in ........
a) More oil consumption
b) Engine efficiency is
c) Perfect sealing oil valve
d) Increased valve life
Answer:- a) More oil consumption

32. The late opening of engine valve
 is termed as .........
a) Lead
b) Leg
c) Throw
d) Bore
Answer:- b) Leg

33. Internal diameter of cylinder is
called as .......
a) Bore
b).D.S.S.
c) B.D.S.
d) Lead
Answer:- a) Bore


34. The pressure inside the cylinder
is .............. the atmospheric pressure
during the exhaust stroke,
a) Equal to
b) Below
c) Above 
d) None of these
Answer:- c) Above 


35. The factors affecting knocking an
engine are .......
a) Compression ratio
b) Cold mixture
c) Additives
d) All of these
Answer:- d) All of these


36. Which is the type of muffler?
a) Baffle type
b) Resonance type
c) Wave cancellation type
d) All of these
Answer:- d) All of these


37. Radiators are generally made of ........
a) Brass and copper
b) Iron
c) Silver
d) Aluminum
Answer:- a) Brass and copper


38. If the temperature of intake air in
internal combustion engine increases,
then its efficiency will -
a) Remain same
b) Decrease
c) Increase
d) None of these
Answer:- b) Decrease


39. The expansion of fuel in a four
stroke cycle diesel engine ............
a) Starts at 15° before top dead center
and ends at 30° after top dead center
b) Starts at top dead center and ends
at 30° after top dead center
c) Starts at 15° after top dead center
and ends at 30° before bottom dead center
d) May start and end anywhere
Answer:- d) May start and end anywhere


40. The pressure at the end of compression
 in the case of diesel engine is of the
order of  .......
a)  6kg/cm
²
b)  12kg/cm²
c)  20 kg/cm
²
d)   35 kg/cm²
Answer:- a)  6kg/cm²

41. The operation of forcing additional
air under pressure in the engine
cylinder is known
as -
a) Scavenging
 b) Turbulence
c) Supercharging
d) Pre-ignition
Answer:- c) Supercharging


42. A diesel engine as compared to
petrol engine (both running and
rated load) is -
a) More efficient
 b) Less efficient
c) Equally efficient
d) Other factors will decide it
Answer:- a) More efficient

43. A diesel engine is ........ as compared
to petrol engine, both running at rated
load.
a) Equally efficient
b) Less efficient
c) More efficient
d) None of these
Answer:- c) More efficient

44. A higher compression ratio causes ............
a) Pre-ignition
b) Increase in detonation
c) Acceleration in the rate of combustion    
d) Any one of these
Answer:- d) Any one of these

45. The size of inlet valve of an engine in
comparison to exhaust valve is ........
a) More
b) Less
c) Same
d) More/less depending on capacity of engine
Answer:- a) More


46. Which is more viscous lube oil?
a) SEA 30
b) SAE 50
c) SAE 70
d) SAE 80
Answer:- d) SAE 80


47. The magneto in an automobile is
basically .............
a) Transformer
b) D.C. generator
c) Capacitor
d) Magnetic circuit
Answer:- b) D.C. generator


48. The output of a diesel engine
can be increased without increasing
the engine revolution or size in
following way ................
a) Feeding more fuel
b) Heating incoming air
c) Scavenging
d) Supercharging
Answer:- d) Supercharging


49. Diesel as compared to petrol is ......
a) Highly ignitable
b) More difficult to ignite
c) Less difficult to ignite
d) None of these
Answer:- b) More difficult to ignite


50. The colour of exhaust from
diesel engine is generally ............
a) White
b) Bluish
c) Black
d) Violet
Answer:- c) Black

२०१८ फ़ेब्रुअर्य एम्प्लोयबिलित्य स्किल्ल्स सेमेस्तेर १ इ ते इ म च क़ु

२०१८ फ़ेब्रुअर्य एम्प्लोयबिलित्य स्किल्ल्स  सेमेस्तेर १ इ ते इ म च क़ु ...