MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 1177 Mcqs, each offering curated multiple-choice questions to sharpen your Electronics knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
A synchronous motor operates at zero load and over excitation. motor in this state? |
| A. | acting as an induction motor |
| B. | synchronous capacitor is |
| C. | is called alternator |
| D. | DC. operates as a generator |
| Answer» C. is called alternator | |
| 52. |
Asbestos sheet is used in three point starter. |
| A. | For setting up OLC |
| B. | For installing NVC coils |
| C. | to wrap the eureka wire |
| D. | All of the above |
| Answer» D. All of the above | |
| 53. |
How can the energy absorbed by a capacitor be calculated? |
| A. | voltage divided by resistance |
| B. | multiplying its voltage by its capacitance |
| C. | multiplying its voltage by its resistance |
| D. | All of the above |
| Answer» C. multiplying its voltage by its resistance | |
| 54. |
In the cumulative compound motor? |
| A. | Series field magnetic field opposes shunt field |
| B. | The cooperation of the shunt field does the series field |
| C. | both right |
| D. | both wrong |
| Answer» C. both right | |
| 55. |
What is the distribution factor of a 3 phase uniformly distributed and short-pitch winding? |
| A. | 0.955 |
| B. | 0.9 |
| C. | 0.965 |
| D. | 0.97 |
| Answer» B. 0.9 | |
| 56. |
The speed of a dc series motor will decrease if the flux in the field winding is |
| A. | will decrease |
| B. | will increase |
| C. | will be stable |
| D. | none of the suitable |
| Answer» C. will be stable | |
| 57. |
What is the rating of the alternator? |
| A. | KVA |
| B. | KW |
| C. | Volt |
| D. | LEFT |
| Answer» B. KW | |
| 58. |
The plate of a lead acid battery is made of? |
| A. | cast-antimonium alloy |
| B. | from antimony-bismuth alloy |
| C. | from zinc-copper alloy |
| D. | from nickel-bismuth alloy |
| Answer» B. from antimony-bismuth alloy | |
| 59. |
What information will you put on the switch board when you are working at a distance from the main switch? |
| A. | Will turn off the main switch and give a working warning |
| B. | Will take out the fuse of the main switch and put a notice of 'work in progress' |
| C. | Let the main switch remain ON and put a warning |
| D. | none of the suitable |
| Answer» C. Let the main switch remain ON and put a warning | |
| 60. |
In an ideal transformer? |
| A. | Has high reactance and zero resistance |
| B. | has high reactance and low resistance |
| C. | Has high reactance and high resistance |
| D. | Has low reactance and high resistance |
| Answer» B. has high reactance and low resistance | |
| 61. |
Polarizer (Dhruvak) material is used in dry cell? |
| A. | Such as |
| B. | Mercury |
| C. | manganese dioxide |
| D. | suitable all |
| Answer» D. suitable all | |
| 62. |
Benefits of Using Mercury in Arc Dictionary? |
| A. | The specific heat of mercury is low |
| B. | The atomic mass of mercury is high |
| C. | ionization potential of mercury is low |
| D. | suitable all |
| Answer» D. suitable all | |
| 63. |
Switches, holders, sockets, plugs, etc. are made from? |
| A. | ebonite |
| B. | Bakelite |
| C. | mica |
| D. | mica knight |
| Answer» C. mica | |
| 64. |
In which of the following furnaces will a sample of steel attain a predetermined temperature? |
| A. | induction heating furnace |
| B. | Electric Resistance Furnace |
| C. | Oil Fired Furnace With Heat Exchanger |
| D. | electric arc furnace |
| Answer» B. Electric Resistance Furnace | |
| 65. |
Use of mica in electronic press? |
| A. | induction heating |
| B. | for dielectric heating |
| C. | is used for insulators |
| D. | suitable all |
| Answer» D. suitable all | |
| 66. |
While using wooden poles in a temporary line, the value of extension should not be more than |
| A. | 50 to 80 m. |
| B. | 40 to 50 m. |
| C. | 100 to 300 m. |
| D. | 60 to 100 m. |
| Answer» C. 100 to 300 m. | |
| 67. |
Cells are connected in series? |
| A. | to increase the current |
| B. | to increase the output voltage |
| C. | to increase the internal resistance |
| D. | to reduce the output voltage |
| Answer» C. to increase the internal resistance | |
| 68. |
What is the size of a ceiling fan? |
| A. | by doubling the distance to the center of the motor |
| B. | by doubling the length of the blade from the edge of the blade |
| C. | by blade length |
| D. | three times the length of the blade |
| Answer» C. by blade length | |
| 69. |
By the power given to the first conductor of the alternator operating at zero load? |
| A. | All losses at zero load are compensated |
| B. | iron losses are compensated |
| C. | copper losses are compensated |
| D. | The decrease in voltage due to armature reaction is compensated by |
| Answer» B. iron losses are compensated | |
| 70. |
Running winding and starting winding are mostly used for? |
| A. | Capacitor Start Capacitor Run In Motor |
| B. | capacitor in permanent motor |
| C. | in slit phase motor |
| D. | suitable all |
| Answer» E. | |
| 71. |
What is the cause of transmission line fault? |
| A. | Distance between two poles (I |
| B. | Tension in the conductor (T |
| C. | Weight per unit length of the conductor (W |
| D. | suitable all |
| Answer» E. | |
| 72. |
This is done so that the rotor of the alternator does not oscillate at one place? |
| A. | Commutation winding |
| B. | Interpol winding |
| C. | damping winding |
| D. | field winding |
| Answer» D. field winding | |
| 73. |
Steps to be taken to reduce the voltage drop at 400Hz as compared to 50Hz? |
| A. | Multi conductors will be used in each phase. |
| B. | Cables will be covered with a non-metallic jacket |
| C. | Will keep various phases with the conductors |
| D. | suitable all |
| Answer» D. suitable all | |
| 74. |
The zero load voltage of a generator is 230V and the rated load voltage is 200V. Will there be voltage regulation? |
| A. | 10 percent |
| B. | 5 percent |
| C. | 15 percent |
| D. | 20 percent |
| Answer» B. 5 percent | |
| 75. |
To find out by Ampere's law? |
| A. | Pole direction in Solamyd |
| B. | Direction of current in overhead lines |
| C. | the direction of the emf generated in the generator |
| D. | DC. direction of rotation of the driver in the motor |
| Answer» C. the direction of the emf generated in the generator | |
| 76. |
Synchronous motor construction? |
| A. | Motivation is like a motor. |
| B. | It is like a repeater. |
| C. | D.C. Compounder is like a motor. |
| D. | none of these |
| Answer» C. D.C. Compounder is like a motor. | |
| 77. |
Speed of dc shunt motor on increasing load? |
| A. | something grows |
| B. | something happens |
| C. | remains stable |
| D. | none of the above |
| Answer» C. remains stable | |
| 78. |
What is the rotor of a synchronous motor? |
| A. | advanced pole format |
| B. | cylindrical shape |
| C. | cage model |
| D. | none of these |
| Answer» E. | |
| 79. |
What is the resistance applied in rheostatic starter? |
| A. | of nichrome wire |
| B. | eureka wire |
| C. | copper wire |
| D. | of tungsten wire |
| Answer» C. copper wire | |
| 80. |
What will be the value of the reading obtained by checking a burnt resistance by ohm meter? |
| A. | double the resistance |
| B. | half of the resistance |
| C. | Zero |
| D. | infinite |
| Answer» B. half of the resistance | |
| 81. |
Armature Lamination Mutually? |
| A. | are kept at a distance. |
| B. | are welded together. |
| C. | touch electrically. |
| D. | are unmarried. |
| Answer» E. | |
| 82. |
Is reputation compatible? |
| A. | of conductivity |
| B. | of magnetism |
| C. | of resistivity |
| D. | none of the above |
| Answer» D. none of the above | |
| 83. |
What is the speed of synchronous motor? |
| A. | underweight |
| B. | changing |
| C. | stable |
| D. | all of the above |
| Answer» D. all of the above | |
| 84. |
What is the resistance of the field winding of the series motor to the armature? |
| A. | happens more |
| B. | falls short |
| C. | remains the same |
| D. | none of the suitable |
| Answer» B. falls short | |
| 85. |
In which of the following instruments, maximum power is expended during measurement? |
| A. | Thermocouple instrument |
| B. | hot wire instrument |
| C. | induction instrument |
| D. | Electro-dynamometer instrument |
| Answer» C. induction instrument | |
| 86. |
to check insulation |
| A. | magar |
| B. | Ohm meter |
| C. | multimeter |
| D. | tong taster |
| Answer» B. Ohm meter | |
| 87. |
In conduit wiring to put the bangle in the pipe? |
| A. | Conduit dye works |
| B. | pipe wrench comes in handy |
| C. | pipe vice works |
| D. | suitable all |
| Answer» E. | |
| 88. |
What does tachometer measure? |
| A. | synchronous speed |
| B. | rotor speed |
| C. | motor efficiency |
| D. | none of the above |
| Answer» C. motor efficiency | |
| 89. |
Winding is done in three phase motor? |
| A. | chain winding |
| B. | concentric winding |
| C. | basket winding |
| D. | all of the above |
| Answer» E. | |
| 90. |
Which motor normally has speed 3000r |
| A. | synchronous motor |
| B. | universal motor |
| C. | induction motor |
| D. | DC. shunt motor |
| Answer» C. induction motor | |
| 91. |
Do you use a rotary converter? |
| A. | D.C. to A. in c. |
| B. | a. converting c to dc |
| C. | both of the above are correct |
| D. | none of the above |
| Answer» D. none of the above | |
| 92. |
The method of heating in which a current is passed through the substance for the temperature of the substance? |
| A. | indirect heating resistance |
| B. | direct induction heating |
| C. | direct resistance heating |
| D. | dielectric heating |
| Answer» D. dielectric heating | |
| 93. |
3ϕ What is a secondary distribution line? |
| A. | 230 V |
| B. | 440 V |
| C. | 1100 V |
| D. | suitable all |
| Answer» C. 1100 V | |
| 94. |
By increasing the ripple in the stream? |
| A. | Section's AC component is less |
| B. | The quality of the stream is low |
| C. | The quality of direction increases |
| D. | Section's AC component increases |
| Answer» E. | |
| 95. |
The direction of rotation of a pump motor is wrong due to wrong combination. How would you find this defect? |
| A. | Motor circuit fuse blows |
| B. | water does not come from the pump |
| C. | Pump drains too much water |
| D. | Pump motor runs too hot |
| Answer» C. Pump drains too much water | |
| 96. |
What is the full name of IC? |
| A. | inductance circuit |
| B. | intermediate circuit |
| C. | integrated circuit |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 97. |
Rotary converter can be started? |
| A. | AC or D.C. side by side |
| B. | DC only side by side |
| C. | AC only side by side |
| D. | suitable all |
| Answer» E. | |
| 98. |
Used at all stations? |
| A. | air blast circuit breaker |
| B. | air circuit breaker |
| C. | oil circuit breaker |
| D. | suitable all |
| Answer» E. | |
| 99. |
When there is blackness at each end of the illumination lamp, it probably means that |
| A. | The lamp has started abnormally- |
| B. | Starter is working improperly |
| C. | The gas that has been filled has insufficient pressure |
| D. | lamp is new |
| Answer» C. The gas that has been filled has insufficient pressure | |
| 100. |
The resulting pitch in the web winding should be approximately ? |
| A. | equal to the sum of surface pitch and front pitch |
| B. | double the forward pitch |
| C. | twice the page pitch |
| D. | equal to the difference between the surface pitch and the front pitch |
| Answer» E. | |