MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A, B, C, D, E and F are sitting in a circle facing towards centre. D is between F and B. A is second to the left of D and second to the right of E. Who is facing towards D ? |
| A. | C |
| B. | A |
| C. | E |
| D. | B |
| Answer» B. A | |
| 2. |
If '+' and ' - ' signs are interchanged, similarly 'x' and ' / ' are interchanged, then find the answer of the following equation.10 - 2 + 12 x 1 / 0 |
| A. | 8 |
| B. | 12 |
| C. | 1 |
| D. | 0 |
| Answer» C. 1 | |
| 3. |
Choose the appropriate combination of signs to solve the given equation.(23-5) * (12+2) *3 * 4 |
| A. | + + = |
| B. | - + = |
| C. | x / = |
| D. | + - = |
| Answer» C. x / = | |
| 4. |
If 'EARN' is written as 'GCTP', how 'NEAR' can be written in that code ? |
| A. | CTGP |
| B. | GPTC |
| C. | PGCT |
| D. | PCGT |
| Answer» D. PCGT | |
| 5. |
In a certain code, 'TOPPER' is written as ' POTREP'. In that code, which word will be written as 'RUBERG'? |
| A. | BURGER |
| B. | BLURBE |
| C. | BURGET |
| D. | BEURGR |
| Answer» B. BLURBE | |
| 6. |
If 'BASKET' is written as 'TEKSAB', how can 'PILLOW' be written in the code? |
| A. | LOWPIL |
| B. | WOLLIP |
| C. | LOWLIP |
| D. | WOLPIL |
| Answer» C. LOWLIP | |
| 7. |
From the given alternatives, select the word that cannot be formed using the letters of given word.Question 'OPERATION' |
| A. | RATION |
| B. | OPERA |
| C. | RATIO |
| D. | NATION |
| Answer» E. | |
| 8. |
The potential barrier existing across pn junction |
| A. | prevents flow of minority carriers |
| B. | prevents flow of majority carriers |
| C. | preventstotal recombinationof holes and electrons |
| D. | prevents neutralisation of acceptor and donor ions |
| Answer» D. prevents neutralisation of acceptor and donor ions | |
| 9. |
In a CE(common emitter) transistor,VCC = 12 V and the zero signal collector current is 1 mA. Determine the operating point when collector load (Re) is 6 kΩ. |
| A. | 6 V,1mA |
| B. | 6 V,2mA |
| C. | 12 V,1mA |
| D. | 12 V,mA |
| Answer» B. 6 V,2mA | |
| 10. |
in a CRO, a sinusoidal waveform of a certain frequency is displayed. the value of the quantity that can be made out by observation is |
| A. | RMS value of the sine wave |
| B. | average value of the sine wave |
| C. | form factor of the sine wave |
| D. | peak-peak value of the sine wave |
| Answer» E. | |
| 11. |
The technique of adding a precise amount of time between the trigger point and the beginning of the scope sweep in a CRO is known as |
| A. | Free running sweep |
| B. | Delayed sweep |
| C. | Triggered sweep |
| D. | Non-sawtooth sweep |
| Answer» C. Triggered sweep | |
| 12. |
Which of the following applications needs frequent starting and stopping of electric motor ? |
| A. | Air-conditioner |
| B. | Lifts and hoists |
| C. | Grinding mig |
| D. | Paper mill |
| Answer» C. Grinding mig | |
| 13. |
dielectric loss is propotional to |
| A. | [frequency]¹⁄³ |
| B. | frequency |
| C. | frequency² |
| D. | frequency³ |
| Answer» C. frequency² | |
| 14. |
The domestic load that has UPF is |
| A. | Fan |
| B. | mixer |
| C. | tube |
| D. | filament lamp |
| Answer» E. | |
| 15. |
inside the earth pit, the earthing electrode should be placed |
| A. | vertical |
| B. | horizontal |
| C. | inclined at 45° |
| D. | inclined at any angle other than 45° |
| Answer» B. horizontal | |
| 16. |
an industrial consumer has a daily load pattern of 2000 kW, 0.8 lag for 12 hours and 1000 kW UPF 12 hours. the load factor is |
| A. | 0.5 |
| B. | 0.75 |
| C. | 0.6 |
| D. | 2.0 |
| Answer» D. 2.0 | |
| 17. |
The transformer used in a welding set is |
| A. | step-up transformer |
| B. | step-down transformer |
| C. | constant current transformer |
| D. | booster transformer |
| Answer» C. constant current transformer | |
| 18. |
The colour of the light given out by a sodium vapour discharge lamp is |
| A. | pink |
| B. | bluish green |
| C. | yellow |
| D. | blue |
| Answer» D. blue | |
| 19. |
To reduce the cost of the electricity generated |
| A. | the load factor and diversity factor must be low |
| B. | the load factor must be low but diversity factor high |
| C. | theloadfactormustbehighbut diversity factor low |
| D. | the load factor and diversity factor must be high |
| Answer» E. | |
| 20. |
the acceptable value of grounding resistance to domestic application is |
| A. | 0.1 Ω |
| B. | 1 Ω |
| C. | 10 Ω |
| D. | 100 Ω |
| Answer» C. 10 Ω | |
| 21. |
In a 3-pin plug |
| A. | all the three pins are of the same size |
| B. | two pins are of the same size but third one is thicker |
| C. | two pins are of the same size but third one is thicker and longer |
| D. | all the three pins are. of different sizes |
| Answer» D. all the three pins are. of different sizes | |
| 22. |
the earthing electrodes should be placed within what distance in meters from the building whose installation system is being earthed ? |
| A. | 4 |
| B. | 2.5 |
| C. | 1.5 |
| D. | 0.5 |
| Answer» D. 0.5 | |
| 23. |
which of the following types of wiring is preffered for workshop lighting ? |
| A. | casing-capping wiring |
| B. | batten wiring |
| C. | concealed wiring |
| D. | surface conduct wiring |
| Answer» D. surface conduct wiring | |
| 24. |
A wire placed on the top of a transmission line acts as |
| A. | a phase wire |
| B. | neutral |
| C. | a transmission wire |
| D. | ground wire |
| Answer» E. | |
| 25. |
As per recommendation of ISI, the maximum number of points of lights, fans and socket outlets that can be connected in one sub-circuit is |
| A. | 8 |
| B. | 10 |
| C. | 15 |
| D. | 20 |
| Answer» C. 15 | |
| 26. |
Supplier's fuse, which is provided in domestic wiring system is |
| A. | after the energy meter |
| B. | before the energy meter |
| C. | before distribution board |
| D. | after main switch |
| Answer» B. before the energy meter | |
| 27. |
Which insulation is most widely used for covering wires/cables used in internal Wiring? |
| A. | Paper |
| B. | Wood |
| C. | Glass |
| D. | PVC |
| Answer» E. | |
| 28. |
The conductor, by means of which the metal body of an equipment or an application is connected to the earth, is known as |
| A. | Neutral continuity conductor |
| B. | Earth discontinuity conductor |
| C. | Earth continuity conductor |
| D. | Neutral discontinuity conductor |
| Answer» D. Neutral discontinuity conductor | |
| 29. |
the maximum demand of a consumer is 2kW and his daily energy consumption is 24 units. his load factor is_________%. |
| A. | 24 |
| B. | 41.6 |
| C. | 50 |
| D. | 80 |
| Answer» D. 80 | |
| 30. |
if the voltage is increased by'n' times the size of the conductor would |
| A. | increase by 'n' times |
| B. | reduce by '1/n' times |
| C. | increase by 'n²' times |
| D. | reduce by'1/n²' times |
| Answer» E. | |
| 31. |
Power distribution by cable is generally adopted for line length |
| A. | less than 10 km |
| B. | above 10 km |
| C. | less than 50 km |
| D. | above 50 km |
| Answer» B. above 10 km | |
| 32. |
turbo alternators have rotors of |
| A. | small diameter and long axial length |
| B. | large diameter and long axial length |
| C. | large diameter and small axial length |
| D. | small diameter and small axial length |
| Answer» B. large diameter and long axial length | |
| 33. |
In an alternator, the effect of armature reaction is minimum at power factor of |
| A. | 0.5 lagging |
| B. | 0.866 lagging |
| C. | 0.866 leading |
| D. | unity |
| Answer» E. | |
| 34. |
If the excitation of an alternator operating in parallel with other alternator is increased above the normal value of excitation, its |
| A. | power factor becomes more lagging |
| B. | power factor becomes more leading |
| C. | output current decreases |
| D. | output kW decreases |
| Answer» B. power factor becomes more leading | |
| 35. |
The leakage resistance of a 50 km long cable is 1 MO. For a 100 km long cable it will be |
| A. | 0.5 MO |
| B. | 2 MO |
| C. | 0.66 MO |
| D. | None of these |
| Answer» B. 2 MO | |
| 36. |
Which of the following equipments is used to limit short-circuit current level in sub-station ? |
| A. | Isolators |
| B. | Lightning switch |
| C. | Coupling capacitor |
| D. | Series reactor |
| Answer» E. | |
| 37. |
At starting, the current through the starting winding (Is) of single phase induction motor |
| A. | lags 'V' by 90° |
| B. | leads 'V' by 90° |
| C. | is nearly in phase with 'V' |
| D. | leads 'V' by 75° |
| Answer» D. leads 'V' by 75° | |
| 38. |
In a single phase induction motor, speed sensitive centrifugal switch is connected in _________winding. |
| A. | parallel with main |
| B. | series with main |
| C. | parallel with starting |
| D. | series with starting |
| Answer» E. | |
| 39. |
In capacitor start single phase induction motor, the current in the |
| A. | supply lines leads the voltage |
| B. | starting winding lags the voltage |
| C. | main winding leads the voltage |
| D. | starting winding leads the voltage |
| Answer» E. | |
| 40. |
A vacuum cleaner employs_______motor. |
| A. | resistance split phase |
| B. | capacitor start |
| C. | shaded pole |
| D. | single phase series |
| Answer» E. | |
| 41. |
Which one of the following methods would give a higher than actual value of regulation of an alternator ? |
| A. | ZPF method |
| B. | MMF method |
| C. | EMF method |
| D. | ASA method |
| Answer» D. ASA method | |
| 42. |
A synchronous motor can be used as synchronous condenser when it is |
| A. | over excited |
| B. | over loaded |
| C. | under excited |
| D. | under loaded |
| Answer» B. over loaded | |
| 43. |
in a single phase induction motor at start, the two revolving feilds produce |
| A. | unequal torques in the rotor conductors |
| B. | no torques in the rotor conductors |
| C. | equal and opposite torques in the rotor conductors |
| D. | equal torques in same direction in the rotor conductors |
| Answer» D. equal torques in same direction in the rotor conductors | |
| 44. |
which of the following single phase motors is available with speed as low as one revolution per minute ? |
| A. | shaded pole |
| B. | reluctance |
| C. | hysteresis |
| D. | universal |
| Answer» B. reluctance | |
| 45. |
Fleming's left hand rule is applicable to |
| A. | DC generator |
| B. | DC motor |
| C. | Alternator |
| D. | Transformer |
| Answer» C. Alternator | |
| 46. |
The emf induced in a DC shunt generator is 230 V. The armature resistance is 0.1 Q. If the armature current is 200 A, the terminal voltage will be |
| A. | 200 V |
| B. | 210 V |
| C. | 230 V |
| D. | 250 V |
| Answer» C. 230 V | |
| 47. |
commutation conditions at full load for large DC machines can be effciently checked by the |
| A. | brake test |
| B. | swinburne's test |
| C. | Hopkinson's test |
| D. | Field test |
| Answer» D. Field test | |
| 48. |
low voltage winding are placed nearer to the core in the case of concentric winding because |
| A. | it reduces hysteresis loss |
| B. | it reduces eddy current loss |
| C. | it reduces insulation requirement |
| D. | it reduces leakage fluxes |
| Answer» D. it reduces leakage fluxes | |
| 49. |
The commutator of a DC generator acts as |
| A. | an amplifier |
| B. | a rectifier |
| C. | a load |
| D. | a multiplier |
| Answer» C. a load | |
| 50. |
stepped core is used in transformers in order to reduce. |
| A. | volume of iron |
| B. | volume of copper |
| C. | iron loss |
| D. | reluctance of coil |
| Answer» C. iron loss | |