Electrician First Year Online CBT Exam MCQs In English -03, These questions are important for the Online CBT Exam of Electrician Trade and also for other competitive examinations like Technical Helper, RRB, ALP, Metro etc.
Electrician First Year Online CBT Exam MCQs In English -03
1. How can the error in read potential transformer (PT) be reduced?
(A) using the back core
(B) Providing long magnetic paths
(C) using high flow density material
(D) Providing quality core content
Answer - (D)
2. Which substance is used to make a negative plate in a lead acid battery?
(A) lead dioxide
(B) sponges lead
(C) lead peroxide
(D) lead sulfate
Answer - (B)
3. How many electrons are in the third cell of a copper atom?
(A) 8
(B) 13
(C) 18
(D) 29
Answer - (C)
4. What is the color of the posterior part of the whip symbol in the parent category?
(A) Blue
(B) White
(C) Yellow
(D) Green
Answer - (C)
5. Which method is used to lift and move heavy loads?
(A) Winches
(B) Cranes and Sling
(C) layers and rollers
(D) Machine driven platform
Answer - (B)
6. What type of capacitor is used for space electronics?
(A) Plastic Film Type
(B) Ceramic Disc Type
(C) electrolytic aluminum type
(D) electrolytic tantalum type
Answer - (D)
7. What is the full form of BIS
(A) Board of Indian Standard
(B) Bureau of Indian Standard
(C) Board of International Standard
(D) Bureau of International Standard
Answer - (B)
8. Which is a semiconductor material?
(A) Eureka
(B) Ebonite
(C) Manganin
(D) Germanium
Answer - (D)
9. What is the purpose of hydrometer at the time of charging in the battery?
(A) Ah to determine capacity
(B) To find the battery voltage level
(C) In determining the specific gravity of electrolytes
(D) None of these
Answer - (C)
10. In parallel coupling circuits, if a cell is combined with opposite polarity, what will be the effect?
(A) the voltage will be zero
(B) Open circuit will be done
(C) No effect
(D) will function normally
Answer - (C)
11. Which law states that the voltage applied in a closed power circuit is equal to the sum of the voltage current?
(A) Ohm's law
(B) law of resistance
(C) Kirchhoff's first law
(D) Kirchhoff's second law
Answer - (D)
12. What type of wiring joints are found in the junction box.
(A) Aerial Tap Add
(B) straight tap joint
(C) Rat tail joint
(D) Married joint
Answer - (C)
13. What is the effect of an electrolytic capacitor, if an open circuit defect occurs?
(A) It will not work
(B) It will burst at once
(C) It will be leaked
(D) It will work normally
Answer - (A)
14. Why should the soldering iron be kept in a stand when not in use?
(A) It prevents burning and fire
(B) To control excess heat
(C) To save time of soldering process
(D) To protect operators from electric shock
Answer - (A)
15. What is staving in fire extinguishers.
(A) To put fuel in the fire
(B) Fuel separation from fire
(C) Lowering temperature by using water
(D) Isolating fire from oxygen supply
Answer - (C)
16. What will be the value of the heated resistance of the bulb rated from 100W / 250v?
(A) 31.25 ohm
(B) 62.50 ohm
(C) 312.50 ohm
(D) 625.00 ohm
Answer - (D)
17. What will be the effect on the output power with respect to temperature in the solar cell?
(A) No effect in temperature
(B) increase with increase in temperature
(C) decrease with increase in temperature
(D) decrease with decrease in temperature
Answer - (D)
18. Why is the load cut off before the off load tap replacement operation?
(A) To disassemble tapping from the neutral point
(B) To disassemble the contact while moving the diverter
(C) To avoid heavy sparking at the contact points
(D) To provide a power isolation for winding
Answer - (C)
19. Exclude power consumption in the unit after lighting 500w lamp for 5 hours
(A) 0.5 unit
(B) 1.0 unit
(C) 1.5 unit
(D) 2.5 unit
Answer - (D)
20. If three resistors R1, R2 and R3 are connected in parallel, find the total resistance.
(A) RT = R1 + R2 + R3
(B) RT = 1 / R1 + 1 / R2 + 1 / R3
(C) RT = 1 / (R1 + R2 + R3)
(D) RT = 1 / (1 / R1 + 1 / R2 + 1 / R3)
Answer - (D)