2. What is the range of the engine efficiency for two stroke
engine? Why you don’t see two stroke engine in car? What are
problem with two stroke engine?
1) A mechanism which enables the rotary motion of one shaft
to another shaft at the same axis is called
a) Gear box
b) Differential
c) Clutch
d) Flywheel
2) The main advantage of a good clutch is
a) Good torque transmission
b) Rapid engagement
c) Large size
d) High inertia
3) Hard shifting of gears would result when
a) There is rapid engagement of gears
b) There is less heat dissipation
c) The clutch inertia is very high
d) There is no clutch free pedal play
4) The torque transmitted by a clutch is given by
a) T = μWR
b) T = μ/WR
c) T = μW/R
d) T = 1/μWR
5) The coefficient of friction for the Asbestos-based
materials used for clutch facing is
a) 0.07
b) 0.17
c) 0.27
d) 0.37
6) The maximum amount of axial load to be applied on a
clutch plate is
a) 100 KN
b) 200 KN
c) 300 KN
d) 400 KN
7) Mean effective radius of contact surfaces of a clutch
plate is decided by
a) Coefficient of friction
b) Axial pressure
c) Space available in the vehicle
d) Amount of torque to be transmitted
8) Axial force to keep the clutch in engaged position is
provided by
a) Springs arranged circumferentially
b) Pressure plate
c) Flywheel
d) Clutch pedal
9) The friction plate is always mounted on
a) flywheel
b) Pressure plate
c) Internally splined hub
d) Clutch spring
10) The main advantage of single plate clutch over cone
clutch is
a) Easier gear changing
b) Less binding of contact surfaces
c) Less pedal movement
d) all of the above
11) The main function of transmission is
a) To provide means to vary the torque ratio between the
engine and the road wheels
b) To provide neutral position
c) To provide means to back the car
d) all of the above
12) The resistance to the vehicle motion whose magnitude
remain constant with respect to the vehicle speed is
a) Resistance due to gradient
b) Resistance due to the road
c) Resistance due to the tyre friction
d) all of the above
13) The resistance to the vehicle motion whose magnitude
various with the square of the vehicle speed is
a) Resistance due to gradient
b) Resistance due to road
c) Resistance due to the tyre friction
d) Resistance due to wind
14) If the tractive effort is the highest for a given
velocity, then the vehicle must be in
a) Top gear
b) Third gear
c) Second gear
d) First gear
15) The point of interaction of the tractive effort curve
and the total resistance curve is called
a) Stabilizing speed point
b) Low speed point
c) High speed point
d) Normal speed point
16) If the given tractive effort curve and the total
resistance curve does not intersect, then
a) The vehicle will accelerate
b) The vehicle will decelerate
c) The vehicle will not be able to go at this gradient for
the given gear
d) None of the above
17) The main disadvantage of sliding mesh type of gear box
is
a) High noise level
b) Low mechanical efficiency
c) High skill required by the driver
d) all of the above
18) Double declutching is used for the engagement of gears
in
a) Sliding mesh type of gear box
b) Constant mesh type of gear box
c) Synchromesh type of gear box
d) None of the above
19) High speed gear is obtained in the case of sliding mesh
gear box when
a) Motion is transferred through the clutch gear to lay
shaft gear
b) Main shaft is coupled to the clutch shaft
c) Smallest gear on the lay shaft is engaged
d) Largest gear on the lay shaft is engaged
20) The Figure 1 depicts
a) Top gear
b) Second gear
c) First gear
d) Reverse gear
21) In case of a constant mesh gear box, when the left dog
clutch is slid to the left by means of the selector
mechanism,
a) Direct gear is obtained
b) First gear is obtained
c) Second gear is obtained
d) Reverse gear is obtained
22) In a constant mesh gear box, when the right dog clutch
is engaged with the gear on the right side of the main
shaft,
a) Direct gear is obtained
b) First gear is obtained
c) Second gear is obtained
d) Reverse gear is obtained
23) Double declutching is required in constant mesh gear
box
a) To equalize the speed of main shaft gear and the sliding
dog
b) To provide direct gear
c) To equalize the speed of countershaft gear and the
sliding dog
d) None of the above
24) The number of spring loaded balls provided
circumferentially in a synchromesh gear box is
a) 3
b) 4
c) 5
d) 6
25) In a synchromesh device, when members G1 and F1 are
slid to left and cones M1 and M2 are in contact,
a) Direct gear is obtained
b) Second gear is obtained
c) Third gear is obtained
d) Reverse gear is obtained
26) For the second gear in a synchromesh system, the drive
transfer will be through
a) U1, U2, C, F2, and splines
b) U1, U2, C, F1, and splines
c) U1, U3, D, F3, and splines
d) U1, U4, U5, E, F2, and splines
27) Interlocking mechanism is provided in the gear box
cover
a) To prevent engagement of two gears simultaneously
b) To prevent engagement of reverse gear
c) To facilitate the gear selection
d) To avoid the necessity of having neutral gear
28) Stiff spring is used in the selector mechanism
a) To prevent engagement of two gears simultaneously
b) To prevent engagement of reverse gear
c) To facilitate the gear selection
d) To avoid the necessity of having neutral gear
29) Propeller shaft is used for the purpose of
a) Transmitting the drive from the transmission to the
bevel pinion of the final drive
b) Transmitting the drive from the crankshaft to the road
wheels
c) Transmitting the drive from the transmission to the road
wheels
d) Transmitting the drive from the crankshaft to the bevel
pinion of the final drive
30) Slip joints are provided in the propeller shaft
a) To adjust the inclination of the propeller shaft
b) To adjust the length of the propeller shaft
c) To prevent the whirling of the propeller shaft
d) To adjust the up and down movement of the rear axle
31) If two shafts used for transfer of drive are inclined
to each other, then
a) Slip joint is used
b) Flange coupling is used
c) Universal joint is used
d) None of the above
32) The Hook’s joint works efficiently when the propeller
shaft inclination is
a) 18o
b) 28o
c) 38o
d) 48o
33) The number of arms provided to the Cross of the Hook’s
joint is
a) 1
b) 2
c) 3
d) 4
34) The function of the final drive is to
a) Provide a permanent speed reduction
b) To turn the drive round through 90o
c) To provide drive to the rear wheels
d) all of the above
35) The permanent reduction provided by the final drive in
car is
a) 4:1
b) 6:1
c) 8:1
d) 10:1
36) The permanent reduction provided by the final drive in
heavy vehicle is
a) 4:1
b) 6:1
c) 8:1
d) 10:1
37) Single reduction is used in final drive when it is
about
a) 6:1
b) 8:1
c) 10:1
d) 12:1
38) The function of Differential is
a) To prevent wheel skidding
b) To reduce the speed of the inner wheels during turning
c) To keep the speed of all the wheels same when going
straight ahead
d) all of the above
39) The crown wheel of the final drive is connected to
a) Cage
b) Spider
c) Cross pin
d) Axle half shaft
40) In a vehicle, which is going straight ahead at N rpm,
if the left wheel rotates forward at n rpm, then the
resultant speed of the right wheel will be
a) N+n
b) N-n
c) N/n
d) Nn
most popularly used gas,characterestics,applications,features
67
1. How are voltmeter and am meter connected in the circuit?
2. What is the function of space heaters for motors?
3. What is Ohms law?
4. Enumerate the parts of Main Switchboard
5. Examples of good conductors of electricity.
6. Examples of good insulators.
7. What are to be checked in an induction motor?
8. How many battery discharges?
9. How to find ground in main switchboard?
10. What is the cause of motor not to start?
11. Where can you find space heater lam p and what is its
purpose?
12. How do you detect earth by lam p?
13. Why the transformer is mostly used aboard the ship?
14. Electrical symbol
15. List the different devices and components of main
switchboard.
16. What are to be checked in an induction motor?
17. How do you detect earth by lam p?
18. How do you reset the circuit breaker?
19. What is the purpose of ventilation in the battery room?
20. What are the usual checks when induction motor is running?
21. Methods to dry up wet induction motors?
22. The unit of resistance?
23. The lowest allowable insulation resistance?
24. What is space heater?
25. What is hertz in electrical system?
26. In electricity, what is commutator? Carbon brush?
27. Draw a parallel circuit with one battery and two
resistors. Derive the formula for resistance?
28. Define earth lamp?
29. What is the use of multi tester?
30. How to check the diode, fuse and bearer switch?
31. What is the formula to determine the speed of induction
motor?
can we use servomotor for applying torque or load to the
gear box drive shaft at various speeds for gear box
testing purpose
190
1. Give five parts inside the centrifugal pump and explain each?
2. What type of gear is the first reduction gear pinion?
3. List the main parts of Centrifugal pump
4. Enumerate the cause of pumps low delivery of water
5. What type of pump is main L.O. pump?
6. How to shut down and overhaul the centrifugal pumps?
7. What is the specific gravity or relative density of fuel oil?
8. Properties of F.O. the cause damage on auxiliary boiler.
9. Device use to control flow rate of centrifugal pump.
10. What is the use of gravity disc?
11. What causes damage to impellers?
12. Give the procedures in starting centrifugal pumps.
13. How to stop a purifier?
14. What type of pump is are commonly used in auxiliary boilers?
15. Explain the operation of a centrifugal purifier.
16. How would you increase the volume efficiency of
centrifugal pump?
17. What is fuel oil viscosity, specific gravity?
18. What type of pump is lubricator pump?
19. Identify or enumerate the parts of stern tube
20. Explain how to adjust pump pressure
21. What is absolute pressure
22. Purpose of stern tube sealing
23. What is white metal
24. What is compound gage
25. What are safety considerations in welding job?
26. Explain the procedure in staring a F.O. purifier
27. What is a manometer and give an example of its application
28. What is acceleration
29. Enumerate or identify the parts of purifier bowl assembly
30. What are the types of pump can be found in the engine room
31. What is an oil mist detector
32. What type of metal is used in a propeller
33. What is the purpose of safety valve
34. What is the purpose of gravity tank in the stern tube
35. Explain the opening and closing of water to the bowl of
the purifier
36. Which has the greater pressure in a stern tube sealing
seawater or L.O.
37. What is the purpose of turning gear
38. Locate nozzle in a turbocharger
39. What is the function of mouth ring
40. What is flash point
41. How do you check steering gear
42. What is pitch
43. What is the cause of pressure drop in a centrifugal
44. Identify the parts of propeller
45. Explain adiabatic expansion
46. What is entropy
47. What is the common source of leak in stern tube
48. What is the purpose of bilge separator
49. Reason why we should avoid low speed running generator?
50. What will you check if one cylinder of your engine is
not like the others?
51. What is the purpose of gravity disc in centrifugal purifier?
52. Causes of F.O. Purifier abnormal flow?
53. What type of pump use in boiler F.O. system?
54. Give the function of evaporator?
55. What are the causes of L.O. high temperature?
56. How to detect staring valve leaks?
57. What are the causes of dirty lubricating oil?
58. What are the purposes of spiral gear in a purifier?
59. How much pressure on air reservoir?
60. What is non-destructive test and what is the purpose of it?
61. Where can you find the feed check valve and feed stop
valve and give the purpose of it?
62. What are the causes of trouble in a boiler during
operations?
63. What are the causes of positive and negative propeller slip?
64. What is the pressure of fuel oil on main engine and
diesel generator?
65. Preparation before arriving port?
66. Where is the expansion tank located?
67. How the F.W.C. system of diesel engine circulate?
68. What are the procedures on how to anneal?
69. How many percent (%) of carbon content in Cast Iron?
70. What will happen if the centrifugal pump has no pressure?
71. What are the things to do when approaching the port?
72. Give the safety precaution when working in a high place.
73. Checking points in steering gear system?
74. What are the procedures in paralleling D/G?
75. What is the indication of leaking starting valve of an
engine?
76. What will be the cause of high temperature in one
cylinder of D/E?
77. What is the purpose of air cooler of D/E?
440
1.what is the minimum percentage for
engineering students?
I like to become RTO officier...please send me procedure for
that...
523
What is the composition of Cast Iron Grade:GG P70 ?
524
Why I/P transducer is connect with 24V DC not to 220V AC?
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