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1. A good engineering practice usually requires that a series-parallel resistive network be assembled from _______.

 
 
 
 

2. Three resistances R1= 470 Ω ; R2 = 2.2 kΩ ; R3 = 3.3kΩ are connected in parallel to 15V supply, suppose that resistor R2 opens up, the current through the other two resistors will ______.

 
 
 
 

3. In a voltage divider network, the total resistance _______.

 
 
 
 

4. The maximum voltage output from a voltage divider _____.

 
 
 
 

5. Proper biasing in an amplifier circuit ________.

 
 
 
 

6. A transistor can be prevented from needles overheating by _______.

 
 
 
 

7. Which is correct regarding bleeder resistor?

 
 
 
 

8. With respect to mechanical strength and circuit breaker, a vessel´s electrical distribution system is designed for a __________.

 
 
 
 

9. The vessel’s electrical system discriminative properties means that the ___________.

 
 
 
 

10. The shore connection cable is designed in such a way that incorrect connection is not possible and shall be of a type tested design by a_________.

 
 
 
 

11. In a situation that the shore connections plug and socket is manually operated while the circuit breakers are CLOSED, the plug _________.

 
 
 
 

12. At high cable tension, the shore connection shall be ______.

 
 
 
 

13. To prevent any hazardous switching operations of the circuit breakers that are part of the electrical shore connection system, inclusive on board circuit breakers for generators, earthing switches, and others, shall have necessary ________.

 
 
 
 

14. A control system shall be arranged onboard the vessel for the electric shore connection system in such a way that shall trip both shore side breaker and ________.

 
 
 
 

15. A control system shall be arranged onboard the vessel for the electric shore connection system that shall trip both shore side breaker and main switchboard incoming feeder in case of ________. I. earth fault II. Short circuit III. Shore side under-voltage

 
 
 
 

16. An independent system for emergency disconnection of shore connection shall be arranged with an emergency ________.

 
 
 
 

17. An independent system for emergency disconnection of shore connection shall be arranged with one emergency stop button in which of the following locations? I. Ship’s side where the electrical shore connection is located II. Shore connection switchboard III. Continuously manned location

 
 
 
 

18. Electric Shore Connection systems shall be equipped with which of the following instrumentation? I. Ohmmeter II. Voltmeter III. Phase sequence indicator

 
 
 
 

19. Electric Shore Connection systems shall be equipped with which of the following instrumentation? I. Kwh counter II. Ampere meter switch III. Ampere meter in each phase

 
 
 
 

20. All shore connection cables used and installed on board shall be approved by the ________.

 
 
 
 

21. What is the approximate resistance setting of a rheostat in which a 650mA of current flows with a 150V source?

 
 
 
 

22. When there is a 72 mA of current through a 2.4 Kilo-ohms resistor, the voltage across the resistor is __________.

 
 
 
 

23. If a Wheatstone bridge is balanced, what will be the reading in a voltmeter in the center of the bridge?

 
 
 
 

24. If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?

 
 
 
 

25. What determines if resistor connections are in series, parallel, or series–parallel?

 
 
 
 

26. If R1 is in series with a parallel combination of R2, R3, and R4, when the resistance value of R2 increases, what will happen to the voltage across R3?

 
 
 
 

27. For a forward-biased diode, what will happen to the barrier potential if there is an increase or rise of temperature?

 
 
 
 

28. Calculate the ripple voltage of a full-wave rectifier with a 75µF filter capacitor connected to a load drawing 40 mA?

 
 
 
 

29. In which period is the capacitor filter discharged through the load in a full-wave rectifier?

 
 
 
 

30. A voltage regulator with a no-load output dc voltage of 12 V is connected to a load with a resistance of 10Ω. If the load resistance decreases to 7.5Ω, the load voltage will decrease to 10.9 V. The load current will be ________, and the percent load regulation is ________.

 
 
 
 

31. A switching regulator that is configured as a voltage-inverter produces what type of output?

 
 
 
 

32. In which period is the capacitor filter charged in a full-wave rectifier?

 
 
 
 

33. In a regulated supply, what term describes how much change occurs in the output voltage over a certain range of load current values, from minimum to maximum current?

 
 
 
 

34. What type of diode circuit is used to add or restore a dc level to an electrical signal?

 
 
 
 

35. If the ac supply is 50 Hz, what will be the ripple frequency out of the full-wave rectifier?

 
 
 
 

36. A silicon diode in a half-wave rectifier has a barrier potential of 0.7 V. What is the effect of this potential barrier?

 
 
 
 

37. From the surveyor’s point of view steering gear system can be viewed as consisting of ________. I. power unit II. steering control III. indications and alarms

 
 
 
 

38. For certain type of vessels such as passenger ships and ferries as recommended by the SOLAS requirement, one of the steering gear motors will be supplied via the ____________.

 
 
 
 

39. How many steering gear motor will be supplied via the emergency switchboard as per SOLAS requirement for certain vessel types such as passenger ships and ferries?

 
 
 
 

40. Rudder control from the bridge position may be via a _______. I. Hydraulic telemotor II. Electric controller III. Both hydraulic telemotor & electric controller

 
 
 
 

41. The steering gear and its control must be functionally tested for its response that the rudder must be swung from port to starboard in __________.

 
 
 
 

42. The steering gear and its control must be functionally tested for its response. This is generally specified to be that the rudder must be swung from _______.

 
 
 
 

43. A fully loaded response of the steering gear can only be obtained when the ship is ____________.

 
 
 
 

44. Since steering gear motor does not have an over current trip protection, the Only main circuit protection is from the back-up fuses which are essential For ____________.

 
 
 
 

45. A steering gear motor does not have overcurrent trip protection, the only main circuit protection which is essential for short-circuit protection is the by the _______.

 
 
 
 

46. UMS requirements demand that a standby main generator starts auto¬matically In case of failure of the service generator. The standby generator is to start and close onto the dead bus bars within ____________.

 
 
 
 

47. In UMS system, alarms displayed on the main console in the engine control room are relayed to the smaller group alarm panel. The selected duty engineer is allowed to respond to a machinery alarm within __________.

 
 
 
 

48. If the engineer has not reached the control room and accepted the alarm within the specified time, an alarm is sounded generally in the alleyway adjacent to the engineers' accommodation called _______.

 
 
 
 

49. When a motor is switched on, there is a high inrush of current from the mains and if the power line section is inadequate, may cause a drop in voltage likely to affect receptor operation. This drop may be severe enough to be noticeable in _____________.

 
 
 
 

50. In order to overcome a noticeable drop in voltage when a motor is switched on due to a high inrush current from the mains, some Society rules prohibit the use of motors with ___________.

 
 
 
 

51. The motor that starts with its own characteristics and behaves like a transformer with its secondary, formed by the very low resistance rotor cage in short circuit is a _______.

 
 
 
 

52. In spite of its advantages being simple equipment, high starting torque, fast start and low cost, direct on-line starting is only suitable when ________. I. the power of the motor is low compared to that of the mains, which limits interference from inrush current II. the machine to drive does not need to speed up gradually or has a damping device to limit the shock of starting III. starting with high loads on supplies with low short-circuit capacity

 
 
 
 

53. The winding of the star-delta starting system must be done so that the delta connection matches the mains voltage. Thus a 380V, 3-phase supply will need a motor with ___________.

 
 
 
 

54. What is the simplest mode of starting system, where the stator is connected to the mains supply _______.

 
 
 
 

55. The starting system that can only be used with a motor where both ends of its three stator windings are fitted to a terminal board is called _______.

 
 
 
 

56. The principle of the star-delta starting system is to start the motor by connecting the star windings at mains voltage, which divides the motor’s rated __________.

 
 
 
 

57. The winding of the star-delta starting system must be done so that the delta connection matches the mains voltage. Thus a 380V, 3-phase supply will need a motor with ___________.

 
 
 
 

58. The winding of the star-delta starting system must be so arranged so that the delta connection matches the mains voltage. Thus a 440V, 3-phase supply will need a motor with ____________.

 
 
 
 

59. The winding of the star-delta starting system must be done so that the delta connection matches the mains voltage. Thus a 440V 3-phase supply will need a motor with _______.

 
 
 
 

60. Star connection is changed to delta connection during start-up of star-delta motor to prevent short-circuiting between phases. The delta contactor will close after the star contactor opens in _______.

 
 
 
 

61. What type of motor starting which has a stator winding divided into two parallel windings with six or twelve output terminals, equivalent to two “half motors” of equal power?

 
 
 
 

62. What kind of motor starting that cannot be started direct on-line with its rotor windings short circuited, otherwise it would cause unacceptable current peaks?

 
 
 
 

63. While the stator is powered at full mains voltage, a resistor that is inserted in the rotor circuit is gradually short circuited to avoid unacceptable current leak during start up, is the characteristic of _______.

 
 
 
 

64. What is an effective starting system to use whenever speed must be controlled and adjusted?

 
 
 
 

65. Frequency converter starting system is effective to use whenever speed must be controlled, adjusted and include starting with ________. I. high inertia loads II. high loads on supplies with low short-circuit capacity III. machine to drive does not need to speed up gradually or has a damping device to limit the shock of starting

 
 
 
 

66. Which of the following is/are 3-phase asynchronous motor starting systems? I. Direct on line II.Star-delta III.Shaded pole winding

 
 
 
 

67. Which of the following is/are 3-phase asynchronous motor starting systems? I. Auto-transformer motor starting II. Soft starter motor starting III. Frequency converter motor starting

 
 
 
 

68. Which of the following starting system cannot start the motor on its own, instead different ways are used such as using a winding at the stator for auxiliary phase starting?

 
 
 
 

69. Which of the following is the most widely used device set in the auxiliary phase of a single phase motor?

 
 
 
 

70. The most widespread device used in the auxiliary phase of a single phase motor that produce a phase shift opposite of an inductance during starting and operation is a _______.

 
 
 
 

71. What device is used in very low powered motors, around 100 watts, with poles notches and a short circuited conducting rings inserted in them that produce an induced current to distort the rotating field and trigger the starting process?

 
 
 
 

72. In a great many systems, motors are stopped simply by natural deceleration. The time this takes depends solely on the _______. I. inertia of the machine the motor drive II. resistive torque of the machine the motor drive III. inertia of the motor shaft/rotor

 
 
 
 

73. What is the most efficient braking system for motors with an advantage of steadiness and does not require any wear parts?

 
 
 
 

74. The motor that is isolated from the mains power while it is still running and then reconnected to it the other way round is a very efficient braking system with a torque, usually higher than the starting torque, which must be stopped early enough to prevent the motor starting in the opposite direction is the principle of _______.

 
 
 
 

75. What braking system is used on slip ring and squirrel cage motors wherein the price of the source of rectified current is offset by fewer resistors which involves isolating the stator from the mains and sending rectified current to it that creates a fixed flux in the air gap of the motor?

 
 
 
 

76. In order to ensure adequate braking by injection of DC current, the value of the fixed flux in the air gap of the motor, the current must be about _____________.

 
 
 
 

77. What breaking system is ideal on multiple-speed motors to change from fast to slow speed, where the motor’s load drives its synchronous speed, making it act like an asynchronous generator and develop a braking system?

 
 
 
 

78. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a constant-load, lasting long enough to reach thermal equilibrium?

 
 
 
 

79. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a constant-load operation for a given period of time, less than required to reach thermal equilibrium, followed by a pause to restore thermal equilibrium between the machine and the surrounding coolant at around 20° C?

 
 
 
 

80. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a period of operation and a pause with no significant effect on heating?

 
 
 
 

81. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a period of operation and a pause with no significant effect on heating?

 
 
 
 

82. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a significant starting period, a period of constant-load operation and a pause?

 
 
 
 

83. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a significant starting period, a period of constant-load operation and a pause?

 
 
 
 

84. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a period of constant-load operation and a period of no-load operation with no pause?

 
 
 
 

85. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a starting period, a period of constant-load operation and a period of electrical braking with no pause?

 
 
 
 

86. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate on a series of identical cycles, each with a period of constant- load operation at a preset rotation speed, followed by one or more periods of constant-load operation at other speeds with no pause?

 
 
 
 

87. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate where load and speed usually vary non-cyclically within an allowed operating range that duty often includes overloads which can be much higher than full load?

 
 
 
 

88. According to rotating electrical machines rating and performance (IEC 60034-1:2004) which of the following duty service factors is correct for a motor that operate with at most four separate load values or equivalent load values, each one applied long enough for the machine to reach thermal equilibrium with the minimum load in a load cycle can be zero?

 
 
 
 

89. A visible light is converted into electricity in a/an _______.

 
 
 
 

90. A current of 25 A is most likely drawn by a _____.

 
 
 
 

91. A piece of wire has a conductance of 20 Siemens, its resistance is ________.

 
 
 
 

92. A resistor has a value of 300 Ω, its conductance in Siemens (S) is ____.

 
 
 
 

93. A span of wire 1 km long has a conductance of 0.6 Siemens, what is the conductance of a 3 km long of the same wire?

 
 
 
 

94. An air conditioner has cooled a room by 500 BTU over a certain period of time, what is this amount of energy in kWh?

 
 
 
 

95. Which of the following energy unit is most often to define electrical energy?

 
 
 
 

96. What is half-wave rectification means?

 
 
 
 

97. What is correct regarding the output of a half-wave rectifier?

 
 
 
 

98. In the output of a full-wave rectifier which of these is correct?

 
 
 
 

99. A ferromagnetic material is known to be materials which will _____.

 
 
 
 

100. The unit of magnetic flux density which is equivalent to 0.0001Tesla is called ________.

 
 
 
 

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