# Test: Electrical Engineering- 5

## 100 Questions MCQ Test Mock Test Series for SSC JE Electrical Engineering | Test: Electrical Engineering- 5

Description
This mock test of Test: Electrical Engineering- 5 for Electrical Engineering (EE) helps you for every Electrical Engineering (EE) entrance exam. This contains 100 Multiple Choice Questions for Electrical Engineering (EE) Test: Electrical Engineering- 5 (mcq) to study with solutions a complete question bank. The solved questions answers in this Test: Electrical Engineering- 5 quiz give you a good mix of easy questions and tough questions. Electrical Engineering (EE) students definitely take this Test: Electrical Engineering- 5 exercise for a better result in the exam. You can find other Test: Electrical Engineering- 5 extra questions, long questions & short questions for Electrical Engineering (EE) on EduRev as well by searching above.
QUESTION: 1

### What is cable tray ?

Solution: QUESTION: 2

Solution:
QUESTION: 3

### In regenerative braking which of the following is true ?

Solution:
QUESTION: 4

The chemical effect of current is used in

Solution:
QUESTION: 5

Unit of deflection sensitivity of a CRO is

Solution:
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

Solution: QUESTION: 7

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

Solution:
QUESTION: 8

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

Solution:
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

Solution: QUESTION: 10

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

Solution:
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

Solution: QUESTION: 12

The resonant frequency of the given series circuit is Solution: 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

Solution: QUESTION: 14

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

Solution:
QUESTION: 15

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

Solution:
QUESTION: 16

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

Solution:
QUESTION: 17

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

Solution:
QUESTION: 18

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

Solution: QUESTION: 19

A galvanometer can be converted into an ammeter by connecting

Solution: 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 Solution: QUESTION: 21

Wooden cross arms are used for supporting

Solution:
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

Solution: QUESTION: 23

The rotor of a single phase induction motor

Solution:
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 ?

Solution: QUESTION: 25

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

Solution:
QUESTION: 26

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

Solution:
QUESTION: 27

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

Solution:
QUESTION: 28

The current through 120 ohm resistor in the circuit shown in the figure below is Solution:  QUESTION: 29

For the circuit shown below, what is the voltage across the current source Is ? Solution: QUESTION: 30

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

Solution: 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

Solution:  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 ?

Solution: QUESTION: 33

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

Solution:
QUESTION: 34

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

Solution:
QUESTION: 35

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

Solution: QUESTION: 36

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

Solution:
QUESTION: 37

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

Solution:
QUESTION: 38

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

Solution:
QUESTION: 39

The frequency response shown in the figure corresponds to a

Solution:
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 ?

Solution: 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

Solution:  QUESTION: 42

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

Solution:
QUESTION: 43

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

Solution:
QUESTION: 44

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

Solution:  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 ?

Solution: QUESTION: 46

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

Solution:
QUESTION: 47

For what value of unknown resistance x, the potential difference between B and D will bezero in the circuit shown in figure? Solution:  QUESTION: 48

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

Solution: QUESTION: 49

Which motor is a variable speed motor ?

Solution:
QUESTION: 50

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

Solution:
QUESTION: 51

In cutoff region in an NPN transistor

Solution:
QUESTION: 52

Cooling of synchronous generator is done by

Solution:
QUESTION: 53

In dc shunt motor, regenerative braking is limited by

Solution:
QUESTION: 54

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

Solution:
QUESTION: 55

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

Solution:
QUESTION: 56

For protection of rotating machines against lightening surges _____ is used

Solution:
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

Solution:
QUESTION: 58

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

Solution:
QUESTION: 59

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

Solution:
QUESTION: 60

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

Solution:
QUESTION: 61

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

Solution:
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

Solution: QUESTION: 63

Purely inductive current takes power from the ac mains when

Solution:
QUESTION: 64

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

Solution:
QUESTION: 65

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

Solution:
QUESTION: 66

A frog leg winding is used in dc machine to eliminate

Solution:
QUESTION: 67

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

Solution:
QUESTION: 68

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

Solution:
QUESTION: 69

Stable operation of an induction motor is

Solution:
QUESTION: 70

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

Solution:
QUESTION: 71

For under frequency operation the eddy current loss

Solution:
QUESTION: 72

A power system needs injection of VARs at

Solution:
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

Solution: QUESTION: 74

The material used for the manufacture of ground wire is

Solution:
QUESTION: 75

A PIN diode is frequently used as a

Solution:
QUESTION: 76

ICBO in a transistor can be reduced by reducing

Solution:
QUESTION: 77

Avalanche breakdown is primarily dependent on the phenomenon of

Solution:
QUESTION: 78

In case of GLS lamps the increase in supply voltage reduces

Solution:
QUESTION: 79

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

Solution:
QUESTION: 80

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

Solution:
QUESTION: 81

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

Solution:
QUESTION: 82

The inductive reactance of a transformer depends on

Solution:
QUESTION: 83

Constant current transformer is of ____ type

Solution:
QUESTION: 84

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

Solution:
QUESTION: 85

The armature reaction effect in synchronous machine depends on

Solution:
QUESTION: 86

Aluminium conductor cables can be joined by

Solution:
QUESTION: 87

The permissible variation of frequency in power system is

Solution:
QUESTION: 88

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

Solution:
QUESTION: 89

Two part tariff is charged on the basis of

Solution:
QUESTION: 90

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

Solution:
QUESTION: 91

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

Solution:
QUESTION: 92

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

Solution:
QUESTION: 93

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

Solution:
QUESTION: 94

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

Solution:
QUESTION: 95

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

Solution:
QUESTION: 96

The magnitude of fault current depends upon

Solution:
QUESTION: 97

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

Solution:
QUESTION: 98

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

Solution:
QUESTION: 99

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

Solution:
QUESTION: 100

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

Solution: