1. According to KVL the algebraic sum of all IR drops and EMF In
any closed loop of a network is always..
(A) Zero
(B) Positive
(C) Negative
(D) Greater Then Unity
Ans.-(A)
2. Ohm’s law gives relationship
between applied voltage, current and.
(A) Constant
(B) Resistance
(C) Capacitors
(D) Inductor
3. Chassis ground is assumed to
have………….potential
(A) Zero
(B) Positive
(C) Negative
(D) None of these
Ans.-(A)
4. Electron volt is the unit of
(A) Voltage
(B) Energy
(C) Current
(D) Power
Ans.-(B)
5. A 100 ohm resister is to be
used in a circuit carrying a current of 0.5A, it power rating should be.
(A)50W
(B)25W
(C)200W
(D)500W
Ans.-(B)
6. Unit of measure electrical
energy is.
(A)KVA
(B)KW
(C)KWH
(D)Reactive Power
Ans.-(C)
7. In 5 hours a 200W, 250V lamp
will consume.
(A) 10Kwh
(B) 5Kwh
(C) 1Kwh
(D) None Of these
Ans.-(C)
8. Which is the following material
has the lowest resistivity.
(A) Copper
(B) Gold
(C) Aluminum
(D) Silver
Ans.-(D)
9. A good conductor is a ……………….insulator.
(A) Good
(B) Bad
(C) Moderate
(D) Metallic
Ans.-(B)
10. The unit of specific
resistance is.
(A) Ohm-m
(B) Ohm-m2
(C) Ohm/m
(D) Ohm/ m2
Ans.-(A)
11. Power transferred by a DC
network will be maximum when
(A) RL=RTH
(B) RL=RN
(C) RL=RTH=RN
(D) None Of these
Ans.-(C)
12. The resistance of value R Ohms
each are connected in delta the equivalent star will have each resistance of
value.
(A) R ohms
(B) R/3 Ohm
(C) √3 R Ohm
(D) 3 R Ohm
Ans.-(B)
13. The domestic installation is
connected in……………..
(A) Series
(B) Series-Parallel
(C) Parallel-Series
(D) Parallel
Ans.-(D)
14. The Peak factor of the
sinusoidally varying quantity is….
(A) 1.732
(B) 1.414
(C) 1.11
(D) 0.707
Ans.-(B)
15. The standard power supply
frequency in our country is.
(A) 25Hz
(B) 50Hz
(C) 60Hz
(D) 100Hz
Ans.-(B)
16. The power consumed by a coil
is 300w, when 30v dc is applied and 108w when 30v ac is applied. The reactance
of the coil will be.
(A) 3Ohm
(B) 4Ohm
(C) 5Ohm
(D) None of these
Ans.-(B)
17. The power formula for a three
phase circuit is
(A) 3VLIL Cosø
(B) √3VLIL Cosø
(C) 3VPIP
(D) √3VLIL
Ans.-(B)
18. One of the 2 wattmeter
connected to measure the power in a balanced 3phase load will indicated zero
when load pf is.
(A) Zero
(B) Unity
(C) 0.5
(D) None Of these
Ans.-(C)
19. Three similar inductive coil
of resistance 20ohms and reactance of 30ohms are connected in each mesh across
a 3phase 400v supply, what will be phase current.
(A) 11.1
(B) 1.11
(C) 111
(D) 0.111
Ans.-(A)
20. Three delta connected
impedance Z=(30+40J)ohm per phase are connected across 398.36v, 3phase supply
what will be the power.
(A) 571.2865w
(B) 57.12865w
(C) 5712.86w
(D) 5.71w
Ans.-(C)
21. Which of the following is not
a main part of rivet
(A) Head
(B) Shank
(C) Point
(D) Thread
Ans.-(D)
22. The amount by which the two
rods to be joined are drawn together is called a.
(A) Draw
(B) Portrary
(C) Lead
(D) Pitch
Ans.-(A)
23. Which one is cheaper punching
or drilling
(A) Punching
(B) Drilling
(C) Same
(D) None Of These
Ans.-(A)
24. Which of the following
insulation is uses in cable.
(A) Varnished cambric
(B) Vulcanized Rubber
(C) Impregnated paper
(D) None Of These
Ans.-(D)
25. Empire tape is
(A) Varnished cambric
(B) Vulcanised Rubber
(C) Impregnated Paper
(D) None Of these
Ans.-(A)
26. Pressure cable are generally not
used beyond
(A) 11KV
(B) 33KV
(C) 66KV
(D) 132Kv
Ans.-(C)
27. Copper as conductance for cable is
used as
(A) Annealed
(B) Hardness and temperature
(C) Hard Drawn
(D) Alloy with chromium
Ans.-(A)
28. The breakdown voltage of cable
depends on
(A) Pressure Of Moisture
(B) Working Temperature
(C) Time application of the voltage
(D) All of these
Ans.-(D)
29. The surge resistance of cable is
(A) 5 Ohm
(B) 20 Ohm
(C) 50 Ohm
(D) 100 Ohm
Ans.-(C)
30. Low tension cables are generally
used upto
(A) 200V
(B) 500V
(C) 700V
(D) 1000V
Ans.-(D)
31. The Process Of producing chemical
decomposition of a compound by passing electricity through the compound is
called
(A) Electrolysis
(B) Electroplating
(C) Electrolyte
(D) None Of these
Ans.-(A)
32. Which property of the electricity
is responsible for the use of fuse wire in household wiring
(A) Chemical Effect
(B) Heating Effect
(C) Magnetic Effects
(D) All of these
Ans.-(B)
33. Which of the following is bad
conductor of electricity
(A) Distilled Water
(B) Alcohol
(C) Salt Water
(D) Tap Water
Ans.-(A)
34. When electric current is passed
through copper sulphate solution the copper decomposition takes place on the
electrode connected to
(A) Positive terminal Of the battery
(B) Negative terminal of the battery
(C) Any terminal
(D) None of these
Ans.-(B)
35. When electric current passed
through bulb, the bulb give light because of
(A) Electric effect of current
(B) Heating effect of current
(C) Glowing effect of current
(D) Light effect of current
Ans.-(B)
36. Type of wiring depends on
(A) Location and consumer budget
(B) Durability and cost
(C) Safety
(D) All of these
Ans.-(D)
37. ................types of wiring
uses insulated cable supported in porcelain cleats
(A) Metal
(B) DVC conduct
(C) Cleat
(D) CTS/RTS
Ans.-(C)
38. ................wiring is used to
draw TRS cable on teak wood.
(A) Cleat
(B) Batten
(C) PVC
(D) All of these
Ans.-(B)
39. Link Clips are packed in card board
boxes at the rate ...........of link clips per box
(A) 200
(B) 300
(C) 100
(D) 50
Ans.-(C)
40. PVC conduit are available
on........m length
(A) 2
(B) 4
(C) 3
(D) 5
Ans.-(B)
41. Cold bending could be done by using
a
(A) Spring
(B) Hack saw Frame
(C) Hand
(D) Knee
Ans.-(A)
42. How many 15 amp. socket outlets are
needed in kitchen
(A) 1
(B) 2
(C) 3
(D) 4
Ans.-(B)
43. If we have 2, 5 amp socket of 100
watt each then the load in light circuit is
(A) 200
(B) 60
(C) 1000
(D) 500
Ans.-(A)
44. What will be the number lamp each
having 300 lumens required to obtain an average illuminance of 50 lux on a
4mX3m rectangular room
(A) 2
(B) 4
(C) 5
(D) 6
Ans.-(A)
45. What is the work of a driver in
case of an LED
(A) To convert AC to Dc
(B) To Convert DC to AC
(C) Both (a)&(b)
(D) None of these
Ans.-(A)
46. What will be the total flux emmited
by a source of 60candle power
(A) 754.2lumens
(B) 0.001326lumens
(C) 60 lumens
(D) None Of these
Ans.-(A)
47. Which winding of a transformer has
more number of turns
(A) Low voltage winding
(B) High Voltage winding
(C) Primary Winding
(D) Secondary Winding
Ans.-(B)
48. The transformer ratio of a 25KVA,
400V/200V, 50Hz transformer will be
(A) 0.2
(B) 0.5
(C) In between 0.2 & 0.5
(D) None Of these
Ans.-(B)
49. In power transformer oil is used
for .......of the transformer will be
(A) Cooling
(B) Heating
(C) Increasing
(D) Decreasing
Ans.-(A)
50. In a balanced 3 phase load, the
current in the neutral will
(A) Increasing
(B) Decreasing
(C) Zero
(D) None of these
Ans.-(C)
