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Technical Test SSC JE: Electrical Engineering (EE)- 5 - Electrical Engineering (EE) MCQ


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100 Questions MCQ Test Electrical Engineering SSC JE (Technical) - Technical Test SSC JE: Electrical Engineering (EE)- 5

Technical Test SSC JE: Electrical Engineering (EE)- 5 for Electrical Engineering (EE) 2024 is part of Electrical Engineering SSC JE (Technical) preparation. The Technical Test SSC JE: Electrical Engineering (EE)- 5 questions and answers have been prepared according to the Electrical Engineering (EE) exam syllabus.The Technical Test SSC JE: Electrical Engineering (EE)- 5 MCQs are made for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Technical Test SSC JE: Electrical Engineering (EE)- 5 below.
Solutions of Technical Test SSC JE: Electrical Engineering (EE)- 5 questions in English are available as part of our Electrical Engineering SSC JE (Technical) for Electrical Engineering (EE) & Technical Test SSC JE: Electrical Engineering (EE)- 5 solutions in Hindi for Electrical Engineering SSC JE (Technical) course. Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free. Attempt Technical Test SSC JE: Electrical Engineering (EE)- 5 | 100 questions in 60 minutes | Mock test for Electrical Engineering (EE) preparation | Free important questions MCQ to study Electrical Engineering SSC JE (Technical) for Electrical Engineering (EE) Exam | Download free PDF with solutions
Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 1

What is cable tray ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 1

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 2

Capacitor banks are connected with ac induction motor

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Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 3

In regenerative braking which of the following is true ?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 4

The chemical effect of current is used in

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 5

Unit of deflection sensitivity of a CRO is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 6

A 400A, 50 Hz, 30 HP, three phase IM is drawing 50A current at 0.8 p.f. lagging. The stator and rotor copper losses are 1.5 KW and 900 W respectively. The friction andwindage losses are 1050 W and core loss are 1200 W. The air gap power of the motor will be

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 6

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 7

The number of armature parallel paths in a two pole D.C. generator having duplex lap winding is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 8

The series field of a short shunt D.C. generator is excited by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 9

The meter constant of a single phase 230V induction watt hour meter is 400 revolutions per kWh. The speed of the meter disc for a current of 10A of 0.9 pf lagging will be

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 9

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 10

Electrostatic voltmeters are particularly suitable for measuring high voltages because the construction is simplified due to

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 11

A load is connected to an active network. At the terminal to which the load is connected Rn=10W and Vth = 60V. Then the maximum power supplied to the load is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 11

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 12

The resonant frequency of the given series circuit is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 12

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 13

What is the correct sequence of the following type of ammeters and voltmeters with increasing accuracy ?

1. Moving iron

2. Moving coil permanent magnet

3. Induction

Select the correct answer using the codes givenbelow

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 13

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 14

Compared with a solid conductor of the same radius, corona appears on a stranded conductor at a lower voltage, because stranding

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 15

If the separation between the three phase of a transmission line is increased then

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 16

The mobility of electrons in a material is expressed in units of

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 17

The impurity commonly used for realizing the base region of a silicon n-p-n transistor is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 18

A derive whose characteristics are very close to that of an ideal current source is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 18

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 19

A galvanometer can be converted into an ammeter by connecting

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 19

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 20

The delta connected generator shown in the figure has phase voltage of 200 V on no load.If connection of one of the phase is reversed then resultant voltage across the mesh will be

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 20

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 21

Wooden cross arms are used for supporting

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 22

A moving iron instrument gives full scale deflection with 10 mA has a resistance of 3W. Determine the resistance to be connected in series so as to enable it to read up to 100V

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 22

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 23

The rotor of a single phase induction motor

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 24

An insulating material ring has mean diameter of 100 mm, cross sectional area of 200 mm2.It is wound with 200 turns of insulated wire. Another coil of 1000 turns is wound on the top of the first coil. Then what is the mutual inductance ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 24

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 25

In forward mode NPN BJT, if we increase the voltage Vcc, the collector current increases

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 26

During electric arc welding as the thickness of the metal to be welded increases

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 27

In fluorescent tube, a ballast resistance is connected in series with the choke

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 28

The current through 120 ohm resistor in the circuit shown in the figure below is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 28

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 29

For the circuit shown below, what is the voltage across the current source Is ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 29

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 30

To determine the losses of an alternator, it is driven by

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 30

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 31

A 300 kW alternator is driven by a prime mover of speed regulation 4% while the prime mover of another 200 kW alternator has a speed regulation of 3%. When operating in parallel,the total load they can take without any of them being overloaded is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 31

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 32

A voltage source having an internal impedance of 8 + j6W supplies power to resistive load.What should be the load resistance for maximum power transferred to it ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 32

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 33

The power delivered to a 3-phase load can be measured by the use of 2 wattmeters only when the

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 34

The steady state current in the R-C series circuit, on the application of step voltage of magnitude E will be

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 35

CE configuration is the most preferred transistor configuration when used as a switch because it

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 35

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 36

Silicon devices are preferred at high temperature operations in comparison to germanium because

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 37

Which of the following specification is not correct for a common collector amplifier ?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 38

If R, L and C are the parameters of resistors. What is the condition for the resistor to benon-inductive ?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 39

The frequency response shown in the figure corresponds to a

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 40

A 100 kV, 50 Hz supply is fed to a rectifier ammeter (using a bridge rectifier) through a capacitor. The PMMC ammeter of the rectifier instrument reads 45×10-3 Amp. What is the value of the capacitor ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 40

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 41

The full load copper loss and iron loss of a transformer are 6400 W and 5000 W respectively. The copper loss and iron loss at half load will be respectively

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 41

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 42

Normally which of the following is used, when a large scale conversion from AC to DC power is required ?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 43

The purpose of providing iron-core in a step up transformer is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 44

Two p-n junction diodes connected back to back to make a transistor which of the following is correct ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 44

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 45

A 240 V, dc shunt motor takes a total current of 24 amp. Resistance of shunt field winding is 120W and armature has 0.3W. What is the current in the armature ?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 45

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 46

The torque characteristics of a 3-phase induction motor is similar to that of a

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 47

For what value of unknown resistance x, the potential difference between B and D will bezero in the circuit shown in figure?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 47

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 48

Method of speed control used on 25 kV, 50 Hz single phase traction is same as

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 48

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 49

Which motor is a variable speed motor ?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 50

For a given emitter current the collector current can be increased by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 51

What is the value of current I4 (in A) for the given junction?

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 51

According to Kirchhoff’s Current Law: At any point in an electrical circuit, the sum of currents flowing towards that point is equal to the sum of currents flowing away from that point.

From the above Diagram 
Current Flowing towards the Point: I2, I6, I4 
Current Flowing Away from the Point: I1, I3, I5
 Hence I2 + I6 + I4 = I1 + I3 + I5 
Putting the value of the current 
2A + 7A + I4 = 4A + 3A + 8A 
I4 = 15A − 9A = 6A 
I4 = 6A

 

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 52

Cooling of synchronous generator is done by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 53

In dc shunt motor, regenerative braking is limited by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 54

The least significant feature while selecting a motor for centrifugal pump is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 55

Lightening arresters are used in power system to protect electrical equipment against

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 56

For protection of rotating machines against lightening surges _____ is used

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 57

An inductor with a ferromagnetic core is supplied from a sinusoidal voltage source with frequency 'f'. The current drawn by the inductor will be

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 58

Which one of the following is a speed control method of three phase squirrel cage induction motor

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 59

To maximize the driving torque in an induction type instrument, the flux produced by shunt coil and series coil should be

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 60

Which one among the following has the highest numerical value in a stepper motor?

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 61

The motor which can produce uniform torque from standstill to synchronous speed is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 62

A voltage source having an open circuit voltage of 120 V and internal resistance of 60W, is equivalent to a current source of

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 62

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 63

Purely inductive current takes power from the ac mains when

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 64

A square wave is fed to an R-C circuit. Then

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 65

To improve pf in three phase circuits, the capacitor bank is connected in delta to make

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 66

A frog leg winding is used in dc machine to eliminate

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 67

In dc machine armature winding, the no. of commutator segments is equal to the number of armature

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 68

A cumulatively compounded dc generator is supplying 20A at 200V. Now if the series field winding is short circuited, the terminal voltage

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 69

Stable operation of an induction motor is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 70

In a 3-f induction motor iron loss mainly occurs in

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 71

For under frequency operation the eddy current loss

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 72

A power system needs injection of VARs at

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 73

A thermal generating station has an installed capacity of 15 MW and supplies a daily load of 10 MW for 12 hours and 5 MW of remaining 12 hours. The plant capacity factor for this station is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 73

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 74

The material used for the manufacture of ground wire is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 75

A PIN diode is frequently used as a

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 76

ICBO in a transistor can be reduced by reducing

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 77

Avalanche breakdown is primarily dependent on the phenomenon of

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 78

In case of GLS lamps the increase in supply voltage reduces

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 79

The illumination at various points on a horizontal surface illuminated by same source varies as

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 80

In a purely resistive circuit, the average power is ____ the peak power Pmax

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 81

When a transformer is operating on no load, the primary applied voltage is approximately balanced by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 82

The inductive reactance of a transformer depends on

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 83

Constant current transformer is of ____ type

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 84

The emf generated due to nth harmonic component of flux in an alternator will be____the fundamental emf in magnitude

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 85

The armature reaction effect in synchronous machine depends on

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 86

Aluminium conductor cables can be joined by

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 87

The permissible variation of frequency in power system is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 88

Generators for power plant to supply exclusively peak loads are usually designed for maximum efficiency to occur at

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 89

Two part tariff is charged on the basis of

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 90

An industrial installation has a power factor of 0.8 lagging. It would be economical to improve pf to

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 91

The charging current in a transmission line increases due to corona effect because corona increases

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 92

For 11 kv line, the inductance per km per phase will be of the order of

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 93

As compared to sending and voltage the receiving end voltage of a short line under no load condition is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 94

In 3-phase, 4-wire cable, the x-sectional area of neutral conductor is

Detailed Solution for Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 94

The 3-Phase four wire system is used for the distribution system. A three-phase four-wire supply gives a consumer the choice of a 400 V three-phase supply and a 230 V single-phase supply. Many industrial loads such as motors require a three-phase 400 V supply, while the lighting load in a factory, as in a house, will be 230 V. Industrial loads usually demand more power than a domestic load, and more power can be supplied by a 400 V three-phase supply than is possible with a 230 V single-phase supply for a given size of cable since power = VI cosφ (watts).

This form of connection is shown in Fig. and is known as a star or Y connection. With the resulting 4-wire system, the three loads also are connected in star configuration The three outer wires are called the lines, and the common wire in the center is called the neutral. One reason for the connection of the neutral conductor is to provide a path for currents if the system became unbalanced. Another is that it enables single-phase loads to be connected to a three-phase system. 

 

The addition of the conductor between the star points converts the system into what is known as a ‘three-phase four-wire system‘. We can see that the currents supplied by the generator flow along the lines, through the load and return via the neutral conductor.

However, in a balanced three-phase system are equal, and add up to the neutral current, which is zero:

IBr + IBk + IGr = IN = 0

If the three loads were identical in every way (same impedance and phase angle), then the currents flowing in the three lines would be identical. The three currents meet at the star point of the load. The resultant current returning down the neutral wire would, therefore, be zero. The load, in this case, is known as a balanced load, and the neutral is not strictly necessary. However, it is difficult, in practice, to ensure that each of the three loads is exactly balanced. For this reason, the neutral is left in place. Also, since it has to carry only the relatively small ‘out-of-balance’ current, it is made half the cross-sectional area of the lines.

In some cases, the same-sized cable is normally used for all four wires both to allow for inevitable imbalances and to also ensure that the neutral cable has equal tensile strength as the phase conductors.

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 95

The insulation resistance of a single core cable is 200 MW/km. The insulation resistance for 5km length is

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 96

The magnitude of fault current depends upon

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 97

For a fault at the terminals of synchronous generator, the fault current is maximum for a

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 98

Zero sequence current can flow from a line to transformer bank if the windings are in

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 99

A dc series motor must not be started on no load because it would

Technical Test SSC JE: Electrical Engineering (EE)- 5 - Question 100

A dc shunt motor may have rising speed torque characteristics due to

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