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Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Tests  >  MPPGCL JE Electrical Mock Test - 5 - Electrical Engineering (EE) MCQ

MPPGCL JE Electrical Mock Test - 5 - Electrical Engineering (EE) MCQ


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30 Questions MCQ Test - MPPGCL JE Electrical Mock Test - 5

MPPGCL JE Electrical Mock Test - 5 for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The MPPGCL JE Electrical Mock Test - 5 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The MPPGCL JE Electrical Mock Test - 5 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for MPPGCL JE Electrical Mock Test - 5 below.
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MPPGCL JE Electrical Mock Test - 5 - Question 1
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6% of √(3x) = 0.18, Find the value of x?

Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 1

Given:

6% of √(3x) = 0.18

Concept:

Concept of percentage. It is calculated on the basis of 100

For example x% means x out of 100

Calculation:

According to the question,

⇒ 6% of √(3x) = 0.18

⇒ (6/100) × √(3x) = 18/100

⇒ √(3x) = 3

⇒ 3x = 32

⇒ 3x = 9

⇒ x = 3

∴ Required value of x is 3.

MPPGCL JE Electrical Mock Test - 5 - Question 2
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A student multiplied a number by 4/5 instead of 5/4. What is the percentage error in the calculation?

Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 2



Hence, Option B is correct.

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MPPGCL JE Electrical Mock Test - 5 - Question 3
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What is to be added to 40% of 900 so that the sum must be equal to 30% of 2600?

Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 3

40% of 900 + x = 30% of 2600
360 + x = 780
x = 420
Hence, Option C is correct. 

MPPGCL JE Electrical Mock Test - 5 - Question 4
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A man is standing facing the sun during sunset. Where will his shadow fall?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 4
While standing towards the sun during sunset, that is, standing towards west, his shadow will fall behind him, that is to his back.
MPPGCL JE Electrical Mock Test - 5 - Question 5
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The average weight of A, B and C is 55 kg. If the average weight of A and B be 50 kg and that of B and C be 53 kg, then the weight of B is
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 5

MPPGCL JE Electrical Mock Test - 5 - Question 6
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How many squares in the figure?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 6

The total squares is in the give figure is 12 + 22 + 32 + 42 = 30

MPPGCL JE Electrical Mock Test - 5 - Question 7
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Hydrogen is used in large alternators mainly to-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 7
To cool the machine
MPPGCL JE Electrical Mock Test - 5 - Question 8
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Superposition theorem is not applicable for
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 8

Generally, superposition theorem is used to find voltages and currents. And it is applicable only for linear, bilateral elements.
Superposition theorem is not applicable for power calculation.
Note:

  • The superposition theorem states that "in a linear circuit with several sources, the current and voltage for any element in the circuit is the sum of the currents and voltages produced by each source acting independently."
  • The superposition theorem applies only when all the components of the circuit are linear, which is the case for resistors, capacitors, and inductors it is not applicable to networks containing nonlinear elements.
MPPGCL JE Electrical Mock Test - 5 - Question 9
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Which one of the following is a valid value of coefficient of coupling between two inductors?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 9

Coefficient of coupling (K) = 0.9

MPPGCL JE Electrical Mock Test - 5 - Question 10
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Non-metallic conduit for wiring are generally made of-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 10
Electrical conduit is a raceway or piping system that protects wires and cables from impact, moisture, and vapors. It is a path for either power or communication (low voltage) electrical wiring. It is usually tubular and made of metal (galvanized steel, stainless steel, aluminum) or non-metallic materials (plastics) and is either rigid or flexible. Special types of conduits are required for wet areas and hazardous areas.
MPPGCL JE Electrical Mock Test - 5 - Question 11
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Distribution line in india generally use-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 11
distribution is mainly underground, sometimes in common utility ducts. Rural distribution is mostly above ground with utility poles, and suburban distribution is a mix.[1] Closer to the customer, a distribution transformer steps the primary distribution power down to a low-voltage secondary circuit, usually 120/240 volts in the US for residential customers. The power comes to the customer via a service drop and an electricity meter. The final circuit in an urban system may be less than 50 feet, but may be over 300 feet for a rural customer.
MPPGCL JE Electrical Mock Test - 5 - Question 12
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In gases the flow of current is due to___.
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 12
In gases the flow of current is due to electron, positive ions and negative ion.

Hence, the correct option is (d).

MPPGCL JE Electrical Mock Test - 5 - Question 13
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A 500 KVA transformer has constant loss of 500W and copper losses at full load are 2000W. Then at what load, is the efficiency maximum?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 13
Hence, the correct option is (A)
MPPGCL JE Electrical Mock Test - 5 - Question 14
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The stator winding of an alternator is normally connected in star to eliminate the ____harmonic component of the voltage waveform.
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 14
Hence, the correct option is (A)
MPPGCL JE Electrical Mock Test - 5 - Question 15
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The minimum clearance between the ground and a 220 KV line is about-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 15
minimum ground clearance of 33KV uninsulated electrical conductor is 5.2 meter and 0.3 meters for every 33KV above 33KV.

So, for first 33 kv, 5.2 metres and for next (220-33)= 187kv, 187/33=5.66 for which 5.66*0.3mt= 1.7 mt

In total 5.2+1.7= 6.9 metres for 220 kv

Hence, the correct option is c

MPPGCL JE Electrical Mock Test - 5 - Question 16
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The positive sequence reactance will be equal to negative sequence reactance in case of-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 16
An exact method to compute positive-sequence reactance of power transformers and Transmission line

Hence, the correct option is (A)

MPPGCL JE Electrical Mock Test - 5 - Question 17
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If the number of valence electrons of an atom is 4 then the substance is usually?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 17
The substance is usually a conductor. Good examples of semiconductors are silicon, germanium, selenium which are not even close to group one, two or three.

Hence, the correct option is (A)

MPPGCL JE Electrical Mock Test - 5 - Question 18
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The secondary load impedance of a step-up transformer is ZS The primary impedance  ZP will be
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 18

MPPGCL JE Electrical Mock Test - 5 - Question 19
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In a 50 kVA  transformer, the iron loss is 500 W and full-load Cu loss in 800 W.  The efficiency of the transformer at full-load at 0.8 p.f. lagging is
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 19

Full-load output
=kVA×cosϕ=50×0.8=40 kW
Total F.L. losses
=500+800=1300 W=1.3 kW
Full-load input=40+1.3=41.3 kW
Full-load 

MPPGCL JE Electrical Mock Test - 5 - Question 20
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To avoid the effect of the stray magnetic field in AC bridges, we can use-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 20
Magnetic screening/shielding is a phenomenon of protection of a region against any external magnetic effects. For example, when a soft iron ring is placed in a magnetic field, most of the lines are found to pass through the ring, and no lines pass through the space inside the ring.

Hence, the correct option is (A)

MPPGCL JE Electrical Mock Test - 5 - Question 21
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Insulation resistance of the cable is-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 21

The rule may be stated: Insulation resistance should be approximately one megohm for each 1,000 volts of operating voltage, with a minimum value of one megohm.

Hence, the correct option is (B)

MPPGCL JE Electrical Mock Test - 5 - Question 22
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Armature reaction effect is represented as-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 22
In armature reaction effect is represented as reactance in series with armature resistance.

The armature reaction simply shows the effect of the armature field on the main field. In other words, the armature reaction represents the impact of the armature flux on the main field flux. It reduces the magnitude of the main field flux.

Hence, the correct option is (B)

MPPGCL JE Electrical Mock Test - 5 - Question 23
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Ferrites are ___________ materials.
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 23
Ferrites are ferromagnetic ceramic materials, compounds of iron, boron and barium or strontium and molybdenum. A ferrite material has a high magnetic permeability, which allows it to store stronger magnetic fields than iron and are known as ceramic magnets.

Hence, the correct option is (C).

MPPGCL JE Electrical Mock Test - 5 - Question 24
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The starting resistance of a D.C. motor is generally-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 24
At the time of starting a DC motor, starting resistance is only the resistance of the armature. Since the armature resistance of a motor is very small, generally less than one ohm. But for protection purposes, an extra resistance must be connected in series with the armature.

Hence, the correct option is (C)

MPPGCL JE Electrical Mock Test - 5 - Question 25
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From a uniform light source of 500 CP, a surface 15 meter below, find the value of illumination when rays are inclined at an angle to (60°) to the surface.
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 25
The value of illumination is 4.44 lumen

Hence, the correct option is (A)

MPPGCL JE Electrical Mock Test - 5 - Question 26
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What is the SI unit of power?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 26
The SI unit of power is Watt, named after the scientist Sir. James Watt.

Electric power is the rate, per unit time, at which electrical energy is transferred by an electric circuit.

Hence, the correct option is (A).

MPPGCL JE Electrical Mock Test - 5 - Question 27
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Three equal impedances are first connected in delta across a 3-phase balanced supply. If the same impedances are connected in star across the same supply-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 27
Three equal impedance are first connected in delta across a 3-phase balanced supply. The same impedance is connected in a star across the same supply, then the power consumed will be 1/3 of the previous value.
MPPGCL JE Electrical Mock Test - 5 - Question 28
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Which one of the following is a speed control method of their phase squirrel cage induction motor?
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 28
The pole-changing method is a speed control method of a three-phase squirrel cage induction motor.
MPPGCL JE Electrical Mock Test - 5 - Question 29
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A tank circuit consists of-
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 29
Tank circuit

MPPGCL JE Electrical Mock Test - 5 - Question 30
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Two coupled coils connected in a series have an equivalent inductance of 16 mH or 8 mH depending on the connection. The mutual inductance between the coil is
Detailed Solution for MPPGCL JE Electrical Mock Test - 5 - Question 30

Leq = L1L22M = 16mH …(ii)

By solving (i) and (ii)

M = 2mH

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