MCQOPTIONS
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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.
| 1. |
Will you choose wiring for temporary works? |
| A. | batten wiring |
| B. | PVCConduit Wiring |
| C. | cleat wiring |
| D. | all of the above |
| Answer» D. all of the above | |
| 2. |
Stranded wires are used? |
| A. | in our head line |
| B. | in the binding of the square |
| C. | in binding |
| D. | wiring in homes |
| Answer» B. in the binding of the square | |
| 3. |
What happens in a proton? |
| A. | negative charge |
| B. | free of charge |
| C. | positive charge |
| D. | all of the above |
| Answer» D. all of the above | |
| 4. |
The pole winding which is connected in series to the armature is called? |
| A. | shunt field winding |
| B. | auxiliary winding |
| C. | damping winding |
| D. | Interpol Winding |
| Answer» E. | |
| 5. |
Should it be put on an electric fire? |
| A. | acid |
| B. | dry sand |
| C. | Water |
| D. | none of the above |
| Answer» C. Water | |
| 6. |
On adding sulfuric acid to water? |
| A. | acid changes color |
| B. | generates excessive heat |
| C. | water starts boiling |
| D. | acid turns into base |
| Answer» D. acid turns into base | |
| 7. |
What is the power factor of a pure capacitive circuit? |
| A. | Unity |
| B. | Zero leading |
| C. | zero lagging |
| D. | all of the above |
| Answer» D. all of the above | |
| 8. |
The energy collected by the secondary cell is called? |
| A. | electrical energy |
| B. | chemical energy |
| C. | heat energy |
| D. | light energy |
| Answer» C. heat energy | |
| 9. |
What happens in electron? |
| A. | negative charge |
| B. | positive charge |
| C. | free of charge |
| D. | all of the above |
| Answer» B. positive charge | |
| 10. |
The property of a conductor which helps in increasing the current is called? |
| A. | penetration |
| B. | impedance |
| C. | conductivity |
| D. | above |
| Answer» D. above | |
| 11. |
What is used as an insulator between two conductors in transmission line, distribution line and condenser? |
| A. | dry air |
| B. | slate |
| C. | Bakelite |
| D. | mica knight |
| Answer» C. Bakelite | |
| 12. |
The area of the hysteresis loop is a measure of which gun of matter? |
| A. | magnetism |
| B. | electromagnetism |
| C. | energy spent per cycle |
| D. | magnetic flux |
| Answer» D. magnetic flux | |
| 13. |
What is a fuse wire made of? |
| A. | lead and tin |
| B. | copper and tin |
| C. | of copper and zinc |
| D. | Of zinc and tin |
| Answer» C. of copper and zinc | |
| 14. |
Dangerous current for human body? |
| A. | 1 mA |
| B. | 1 A |
| C. | 50 mA |
| D. | 30 mA |
| Answer» D. 30 mA | |
| 15. |
What is the unit of reluctance? |
| A. | ampere turn |
| B. | ampere turn./weber |
| C. | weber |
| D. | none of these |
| Answer» E. | |
| 16. |
What does the arc voltage in Mercury dielectric depend on? |
| A. | at the temperature of the arc |
| B. | at the length of the arc |
| C. | on the purity of mercury |
| D. | on all of the above |
| Answer» C. on the purity of mercury | |
| 17. |
The output of tungsten filament lamp depends on? |
| A. | glass on the shape of a lamp |
| B. | at the temperature of the fiber |
| C. | on bulb size |
| D. | on all of the above |
| Answer» C. on bulb size | |
| 18. |
Are poles used in overhead lines? |
| A. | pipe type poles |
| B. | tower |
| C. | wooden poles |
| D. | all of the above |
| Answer» E. | |
| 19. |
What is the distance between two poles called? |
| A. | Spain |
| B. | with |
| C. | badging |
| D. | all of the above |
| Answer» B. with | |
| 20. |
Which of the following motors can be operated easily on the backward or forward power multiplier? |
| A. | synchronous motor |
| B. | cage type motor |
| C. | slip-ring induction motor |
| D. | all of the above |
| Answer» B. cage type motor | |
| 21. |
The chemical used in the breather of transformer? |
| A. | water |
| B. | silica gel |
| C. | Sodium chloride |
| D. | mineral oil |
| Answer» C. Sodium chloride | |
| 22. |
Corona loss of structure line? |
| A. | the current exceeds |
| B. | efficiency goes up |
| C. | voltage drops |
| D. | efficiency goes down |
| Answer» E. | |
| 23. |
Power multiplier of transformer? |
| A. | is always 0.8 |
| B. | is always the unit |
| C. | depends on the power factor of the load |
| D. | always backward |
| Answer» D. always backward | |
| 24. |
By which of the following tests, transformer law regulation and efficiency without load is determined? |
| A. | short circuit test |
| B. | open circuit test |
| C. | sumpner test |
| D. | none of these |
| Answer» D. none of these | |
| 25. |
What happens if the belt of a washing machine becomes loose? |
| A. | Spin-tub just won't spin |
| B. | Pulsator only won't rotate |
| C. | the machine will come to a complete standstill |
| D. | will have no effect on the working of the machine |
| Answer» C. the machine will come to a complete standstill | |
| 26. |
What is the process of nuclear breakdown in a nuclear power plant called? |
| A. | Fission |
| B. | Fusion |
| C. | Emission |
| D. | all of the above |
| Answer» B. Fusion | |
| 27. |
Which of the following heating method has the highest power factor? |
| A. | induction heating |
| B. | arc heating |
| C. | dielectric heating |
| D. | resistance heating |
| Answer» E. | |
| 28. |
What are the relays in refrigerators? |
| A. | By simple switch |
| B. | non-magnetic |
| C. | magnetic type |
| D. | all of the above |
| Answer» D. all of the above | |
| 29. |
Which of the following has the maximum periodicity of a frequency? |
| A. | 10Hz |
| B. | 100kHz |
| C. | 100Hz |
| D. | 10kHz |
| Answer» B. 100kHz | |
| 30. |
What is the purpose of installing a booster in a transmission line? |
| A. | To supply additional voltage equivalent to the voltage drop in the circuit |
| B. | Reducing the excess voltage when the voltage in the circuit is increased |
| C. | both suitable |
| D. | none in suitable |
| Answer» D. none in suitable | |
| 31. |
If there is an oil, petrol or electric fire, then the following equipment will be used to extinguish the fire |
| A. | form type |
| B. | ctc |
| C. | Soda Acid Type |
| D. | carbon dioxide |
| Answer» C. Soda Acid Type | |
| 32. |
The function of damping coil in synchronous motor is |
| A. | speed up the motor |
| B. | noise reduction |
| C. | develop only initial torque |
| D. | reduce hunting and develop starting torque |
| Answer» E. | |
| 33. |
If the winding is done in the stationary part of the ceiling fan? |
| A. | Both the rotating and winding parts will be rot |
| B. | The winding part will be the rotor |
| C. | the rotating part will be the rotor |
| D. | none of the suitable |
| Answer» B. The winding part will be the rotor | |
| 34. |
In a device called a toaster, what is the resistance of the outer filament as compared to the central heating filament? |
| A. | double |
| B. | half |
| C. | equal |
| D. | Quarter |
| Answer» C. equal | |
| 35. |
Transformer oil, switch gear, is used in starter? |
| A. | Paper |
| B. | Empire cloth |
| C. | cotton tape |
| D. | insulated oil |
| Answer» E. | |
| 36. |
230V single phase line and 3-phase line which supplies power to various domestic consumers and industries are called |
| A. | secondary distribution |
| B. | primary distribution |
| C. | primary transmission |
| D. | secondary transmission |
| Answer» B. primary distribution | |
| 37. |
What are the active elements in a lead acid battery? |
| A. | lead peroxide and spongy lead |
| B. | spazzy lad |
| C. | nickel hydride and iron oxide |
| D. | manganese dioxide and carbon |
| Answer» B. spazzy lad | |
| 38. |
Generally, there is some loss of electrical power in the electric cable used in temperature instruments, which is due to? |
| A. | heat radiation |
| B. | electric current heat |
| C. | type of cable cover |
| D. | environment around the cable |
| Answer» C. type of cable cover | |
| 39. |
What is the advantage of transmitting power at high voltage? |
| A. | power loss is less |
| B. | This reduces the voltage drop across the line impedance |
| C. | current is less |
| D. | suitable all |
| Answer» E. | |
| 40. |
Very little damping used in ballistic galvanometers? |
| A. | The first deflection is done to take less |
| B. | The first deflection is used to take more |
| C. | The system is made to oscillate |
| D. | Critical damping of the system is done to |
| Answer» C. The system is made to oscillate | |
| 41. |
A in the armature of the rotary converter |
| A. | 90॰ |
| B. | 30॰ |
| C. | 180॰ |
| D. | 120॰ |
| Answer» D. 120॰ | |
| 42. |
What will be the maximum speed of a three phase cage motor at 4% slip? |
| A. | 1440r.p.m. |
| B. | 1500 r.p.m. |
| C. | 2880 r.p.m. |
| D. | 3000 r.p.m. |
| Answer» D. 3000 r.p.m. | |
| 43. |
Field winding is done in universal motor (in mixer)? |
| A. | S.E.Wire 20 to 25 SWG |
| B. | with thick wire |
| C. | with thin wire |
| D. | suitable all |
| Answer» E. | |
| 44. |
Starter contacts are indicated either for their position or for their function. In such a situation, usually closed contact means that? |
| A. | is open when the relay coil is charged |
| B. | is open when the relay coil is re-charged |
| C. | is in closed state with all the states of the relay |
| D. | is closed when relay coil is charged |
| Answer» B. is open when the relay coil is re-charged | |
| 45. |
Capacitor Start-Capacitor Run Induction Motor Originally? |
| A. | is a two-stage induction motor |
| B. | DC. motor is |
| C. | AC motor is |
| D. | 3-phase induction motor |
| Answer» B. DC. motor is | |
| 46. |
What is the winding wire of a three phase submersible motor? |
| A. | PVC Super Enamel Plated Brass |
| B. | PVC Super Enamel Plated Iron |
| C. | PVC Super Enamel Plated Copper |
| D. | none of the suitable |
| Answer» D. none of the suitable | |
| 47. |
The external screw contacts of screw type lamp holders should always be connected with |
| A. | from the switch wire of the circuit |
| B. | from the phase wire of the circuit |
| C. | from the neutral wire of the circuit |
| D. | from the earth wire of the circuit |
| Answer» D. from the earth wire of the circuit | |
| 48. |
S in ceiling fan winding |
| A. | 36SWG |
| B. | 34SWG |
| C. | 35SWG |
| D. | suitable all |
| Answer» E. | |
| 49. |
Star-delta and auto transformer starters are used with three phase induction motors because? |
| A. | Three phase induction motors draw 5 to 7 times the full load current at the time of starting |
| B. | Three phase induction motor should not run in opposite direction |
| C. | The starting torque of three phase induction motor is high |
| D. | they attain high speed instantly |
| Answer» B. Three phase induction motor should not run in opposite direction | |
| 50. |
In a capacitor-start motor, if an inductor of equal reactance is replaced by the capacitor, then the motor will |
| A. | will burn |
| B. | will run normally |
| C. | won't start |
| D. | none of these |
| Answer» D. none of these | |