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## Free Mock Test For OPTCL -07/12/2021 ODISHA POWER TRANSMISSION CORPORATION LIMITED (OPTCL), one of the largest Transmission Utility in the country was incorporated in March 2004 under the Companies Act, 1956 as a company wholly owned by the Government of Odisha to undertake the business of transmission and wheeling of electricity in the State. The registered office of the Company is situated at Bhubaneswar, the capital of the State of Odisha. Its projects and field units are spread all over the State.

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Electrical Mock Test For OPTCL - 07/12/2021

1 / 100

Skin effect occurs when a conductor carries current at_____ frequencies.

2 / 100

The period of a wave is

3 / 100

The peak value of a sine wave is 200 V. Its average value is

4 / 100

Temporary magnets are used in…..

5 / 100

Tesla is a unit of…..

6 / 100

The unit of relative permeability is…..

7 / 100

The rectifier instrument is not free from……

8 / 100

Which of the following are integrating instruments?

9 / 100

An induction meter can handle current up to……

10 / 100

Induction type single phase energy meters measure electric energy in……

11 / 100

. In a transformer the energy is conveyed from primary to secondary

12 / 100

The admitance of a RC circuit is 0.0024S and the supplied voltage is 10v . What is the total current ?

13 / 100

What is the SI unit for magnetic moment?

14 / 100

The no load current in a transformer is -----

15 / 100

Calculate the time taken by a series RL circuit having inductance of 0.6H and resistance of 30Ω to reach a steady state value.

16 / 100

Two coil of self inductance 3H and 5H are connected in series opposite each other. what is the equivalent inductance of the circuit, if the coefficient of coupling between the coil each 0.6?

17 / 100

The mathematical expression for magnetic permeability is

18 / 100

The potential inside a charged hollow sphere is

19 / 100

Two coupled coil with L1 : L2 : 0.5H having a coupling coefficient of K :0.75. The turn ratio N1/N2:?

20 / 100

Calculate the value of phase angle (in degree ) in series RC circuit having a resistance of 50 ohm and a capacitive reactance of 86.6 ohm , when the supply frequency of 50HZ

21 / 100

Determine the instantaneous value of the alternating current (in A) which is represented by i(t)=10sin(25t – 15)A,  if the value of t is 3 ?

22 / 100

In parallel LC circuit what will be the value of current (in A) at resonance ?

23 / 100

Two lamp 40w ,40v and 20w ,40v are connected parallel then what is the total resistance ?

24 / 100

Two lamp 40w ,40v and 20w ,40v are connected parallel then what is the total resistance ?

25 / 100

A circuit breaker is rated as follow 1500 MVA, 33KV, 3sec, 3ø oil circuit breaker . Determine the making current .

26 / 100

. Suspension type insulation the voltage across the center disk is---

27 / 100

Interlocking is not possible in which type of fuse

28 / 100

An ideal current source should have

29 / 100

A RLC series circuit is having resistance of 20Ω, source voltage is 100V , inductor(L)  and capacitor(C) is equal voltage drop that is 200v. Find out the total current in this circuit ?

30 / 100

when two wattmeter are used to measure power of a three phase balanced circuit and one wattmeter reading negative its means the angle of lag is

31 / 100

when a PN junction is forward bias

32 / 100

The magnitude of electric shock on human body depends upon

33 / 100

The current from the stator of alternator is taken to external circuit through

34 / 100

A shunt DC motor armature resistance is 1 ohm and field coil resistance is 100 ohms . Back EMF constant is 9 volt for 100 RPM . The DC supply voltage is 100 volt and it is running with a speed thousand RPM what is dc supply current?

35 / 100

The output of a OR gate is high if.....

36 / 100

A sine wave voltage is applied across a capacitor when the frequency of the voltage is increase the current through capacitor

37 / 100

When the direction of the force applied and the of movement of the object are direction perpendicular to each other.

RRB Group -D, 24-10-2018 (Shift-I)

38 / 100

The work done by the force is positive when-

RRB Group -D, 19-09-2018 (Shift-Ill)

39 / 100

Hydro power, what is the energy that is converted into electrical energy?

RRR ALP. & Tec. 29-08-2018(Shift-)

40 / 100

Ohm's law is not applicable to

41 / 100

If you will increase the voltage then what will happens the resistor in carbon filament lamp?

42 / 100

Two coil have inductance of 8mH and 16mH and a coefficient of coupling of 0.2 . When two coils are series and aiding nature. Then find out the total inductance

43 / 100

If resistance is 40 ohm and inductance is 3H in a R-L series circuit , then what will be the time constant of this circuit ?

44 / 100

Time constant of an inductive circuit

45 / 100

Power factor of a magnetizing components of current of a transformer is

46 / 100

On no load phasor diagram of a transformer the core loss component of the current remain in phase with........

47 / 100

The units of capacitance are

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The direction of electric field due to positive charge is

49 / 100

Tesla is unit of

50 / 100

The endocrine gland regulates hormones that control metabolism and energy-related
reactions

51 / 100

The endocrine organ controls changes in a male's body and regulates the production of
sperm

52 / 100

i = 100Sin(100∏t) find the time for the current to reach 50 ampere

53 / 100

Sinusoidal V= 30Sinwt calculate the time required by the voltage to reach positive pick for second time and reach negative peak for the first time?

54 / 100

what indicate the shape of a B H (curve hysteresis) loop of material?

55 / 100

Why the rotor bar are mounted in a slightly skewed position in three phase motor?

56 / 100

Which type of light fitting design has free from glare?

57 / 100

Which material is coated in tungsten electrode of a fluorescent tube lamp?

58 / 100

In which three phase system the artificial neutral is required to measure the phase voltage?

59 / 100

What is the purpose of split ring in DC Generator?

60 / 100

Why armature resistance of a DC generator is very low

61 / 100

A girl whos weight is 200 N, climbs on a tree which night is 2-meter. What was the workdone by the girl after climbing the tree? (g= 10m/sec)

RRB Group -D, 12-12-2018 (Shift-IIl)

62 / 100

A semiconductor has ………… temperature coefficient of resistance.

63 / 100

The most commonly used semiconductor is ………..

64 / 100

A semiconductor has generally ……………… valence electrons.

65 / 100

The resistivity of a pure silicon is about ……………

66 / 100

When a pure semiconductor is heated, its resistance …………..

67 / 100

The strength of a semiconductor crystal comes from ……..

68 / 100

When a pentavalent impurity is added to a pure semiconductor, it becomes ………

69 / 100

Addition of pentavalent impurity to a semiconductor creates many ……..

70 / 100

Which of the following methods is used for laying of underground cables ?

71 / 100

. The wooden poles well impregnated with creosote oil or any preservative compound have life ______.

72 / 100

. If variable part of annual cost on account of interest and depreciation on the capital outlay is equal to the
annual cost of electrical energy wasted in the conductors, the total annual cost will be minimum and the
corresponding size of conductor will be most economical. This statement is known as ______.

73 / 100

4. Overhead system can be designed for operation upto ______.

74 / 100

_____ are the conductors, which connect the consumer's terminals to the distribution

75 / 100

The increase in resistance per ohm per degree centrigrade rise in temperature is..

76 / 100

What is the commercial unit of electrical energy?

77 / 100

As per IE rules, the supplier is not permitted to vary the declared voltage by more than

78 / 100

As per IE rules, the supplier is not permitted to vary the declared frequency by more than

79 / 100

Fuse is the following part of a circuit

80 / 100

The fuse provides protection against

81 / 100

Fuse is to be provided on

82 / 100

The earth resistance of a low and medium voltage installation should not be more than

83 / 100

Size and quality of earth wire which is used in concealed wiring are

84 / 100

As per ISS, the minimum thickness of wood batten for batten wiring is

85 / 100

Ohm's law is not applicable to

86 / 100

If you will increase the voltage then what will happens the resistor in carbon filament lamp?

87 / 100

Two coil have inductance of 8mH and 16mH and a coefficient of coupling of 0.2 . When two coils are series and aiding nature. Then find out the total inductance

88 / 100

If resistance is 40 ohm and inductance is 3H in a R-L series circuit , then what will be the time constant of this circuit ?

89 / 100

Time constant of an inductive circuit

90 / 100

Power factor of a magnetizing components of current of a transformer is

91 / 100

On no load phasor diagram of a transformer the core loss component of the current remain in phase with........

92 / 100

The units of capacitance are..

93 / 100

The direction of electric field due to positive charge is...

94 / 100

There is no Spring control in

95 / 100

i = 100Sin(100∏t) find the time for the current to reach 50 ampere

96 / 100

Sinusoidal V= 30Sinwt calculate the time required by the voltage to reach positive pick for second time and reach negative peak for the first time?

97 / 100

what indicate the shape of a B H (curve hysteresis) loop of material?

98 / 100

Why the rotor bar are mounted in a slightly skewed position in three phase motor?

99 / 100

Which type of light fitting design has free from glare?

100 / 100

Why armature resistance of a DC generator is very low?

The average score is 41%

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