practice set

SSC JE ELECTRICAL PRACTICE SET - 7

1.

Which of the following statements about the force between two charges is true

Answer/ Hint      

Answer : D

Explanation :

2.

The electrons revolve around the uncleus with height velocity, which type of force acts against the centrifugal force and keeps the electrons in their orbits

Answer/ Hint      

Answer : A

Explanation :

3.

What is the difference between an atom and an ion

Answer/ Hint      

Answer : C

Explanation :

4.

Which particles act as a current in a metallic conductor 

Answer/ Hint      

Answer : A

Explanation :

5.

If the current flows in an anti – clockwise direction, then the polarity of the nearer pole will be  _________

Answer/ Hint      

Answer : C

Explanation :

6.

The electromagnets is made of  __________

Answer/ Hint      

Answer : B

Explanation :

7.

The resistance of a conductor, when its temperature is increased   __________

Answer/ Hint      

Answer : D

Explanation :

8.

In RLC circuits, the electric current at resonance is  ___________

Answer/ Hint      

Answer : A

Explanation :

9.

Which of the following does not have dual relationship

Answer/ Hint      

Answer : D

Explanation :

10.

What other of the electric current is also present in the fluorescent lamp and causes losses in the efficiency of the lamp

Answer/ Hint      

Answer : B

Explanation :

11.

Frequency multiplication by a resistor can be achieved, if  _________ .

Answer/ Hint      

Answer : C

Explanation :

12.

At time t = 0+ with zero initial condition, which of the following acts as an open circuit 

  1. Inductor
  2. Capacitor
  3. Resistor

Answer/ Hint      

Answer : A

Explanation :

13.

The elements in  RCL  series circuit are  _________

Answer/ Hint      

Answer : D

Explanation :

14.

When a source is delivering maximum power to a load, the efficiency of the circuit  __________

Answer/ Hint      

Answer : A

Explanation :

15.

At a frequency less then the resonant frequency

Answer/ Hint      

Answer : A

Explanation :

16.

The value of current at resonance in a series RLC  circuit is affected by the value of  __________  :

  1. R
  2. C
  3. L

Answer/ Hint      

Answer : A

Explanation :

17.

In series LCR circuit, at resonance  __________

Answer/ Hint      

Answer : B

Explanation :

18.

The superposition theorem  is applicable to   _____________

Answer/ Hint      

Answer : C

Explanation :

19.

Which is the most suitable thermocouple transducer for the measurement of temperature in the range of 13000 C to 15000 C

Answer/ Hint      

Answer : B

Explanation :

20.

Consider the following statement :

A Linear Variable Differential Transformer (LVDT) has

  1. One primary winding
  2. Two exactly similar secondary windings
  3. A toroidal magnetic core of these statements which  is/are  correct 

Answer/ Hint      

Answer : B

Explanation :

21.

Match List – 1 (transducer) with List – 2 (input/output variables) and select the correct answer using the codes given below the list 

            List – 1                                              List – 2

P   Electrodynamic generator        1  Gas pressure to resistance change

Q   Venture meter                              2  Force to displacement

R   Pirani gauge                                  3  Motion to voltage  

S    Spring balance                             4  Flow rate to pressure

Answer/ Hint      

Answer : C

Explanation :

22.

Applications of precision diode are 

  1. half wave rectifier
  2. Peak detector
  3. Window detector

Answer/ Hint      

Answer : C

Explanation :

23.

Watt-meters can be grouped under  ____________

Answer/ Hint      

Answer : A

Explanation :

24.

If which of the following do the measurement find their application ?

  1. Automatic control of processes & operations
  2. Engineering experimental analysis
  3. Monitoring of processes & operations

Answer/ Hint      

Answer : D

Explanation :

25.

Multi-meters are provided with separate scale for low ac voltage to  __________

Answer/ Hint      

Answer : D

Explanation :

26.

A voltmeter with a broadband width has  ____________

Answer/ Hint      

Answer : D

Explanation :

27.

For what voltage levels are the screwed conduit circuits used

Answer/ Hint      

Answer : B

Explanation :

28.

What is an electrical schedule ?

  1. A list or a plan of a building providing information of number of point room.
  2. The list of all the electrical components required for a particular room.
  3. The list all the electrical components along with their prices

Answer/ Hint      

Answer : A

Explanation :

29.

Which among these is a method of wiring ?

  1. Joint box
  2. Tee system
  3. Loop in system

Answer/ Hint      

Answer : D

Explanation :

30.

Which among the following information is required for a good estimation ?

  1. Availability of products
  2. Source of production, vendor selection
  3. New products and their quality
  4. Prices and the discounts provided for each product

Answer/ Hint      

Answer : C

Explanation :

31.

Which material is used for wiring continuous bus bar

  1. Aluminium
  2. Copper

Answer/ Hint      

Answer : A

Explanation :

32.

What is meant by contingencies 

  1. The list of required component are included in this category
  2. The list of vague and unforeseen item is included in this category
  3. The list of components along with their discounted prices is included in this category

Answer/ Hint      

Answer : B

Explanation :

33.

Which among the following mode of tendering is used by purchase department

  1. Open tendering
  2. Limited tender
  3. Spot tendering
  4. Global tendering
  5. Proprietary tendering

Answer/ Hint      

Answer : D

Explanation :

34.

What is the maximum load that can be connected in a circuit connecting only lighting points 

Answer/ Hint      

Answer : C

Explanation :

35.

What is ment by petty purchase

Answer/ Hint      

Answer : B

Explanation :

36.

What is the maximum number of lighting points that can be connected in a circuit 

Answer/ Hint      

Answer : B

Explanation :

37.

In an intrinsic semiconductor  ________

Answer/ Hint      

Answer : B

Explanation :

38.

The minority of carrier concentration is largely a function of  _______

Answer/ Hint      

Answer : B

Explanation :

39.

In the depletion region of a  PN  junction, there are  _________

Answer/ Hint      

Answer : B

Explanation :

40.

The donor atoms in an N-type semi-conductor at normal temperature   ___________

Answer/ Hint      

Answer : A

Explanation :

41.

In a synchronous motor  __________

Answer/ Hint      

Answer : A

Explanation :

42.

The break test for the determination of efficiency of a  DC  machine is   _________

Answer/ Hint      

Answer : C

Explanation :

43.

Commutation conditions at full-load a large  DC  machine can be checked by  _________

Answer/ Hint      

Answer : C

Explanation :

44.

The load carried by  V – V  connection is  _________

Answer/ Hint      

Answer : B

Explanation :

45.

DC motors should be stopped by opening the line switches and not by forcing the starter handle back to the off position because 

  1. Heavy sparking occurs at the brushes.
  2. Heavy sparking occurs at the first stud of the starting resistance steps

Answer/ Hint      

Answer : B

Explanation :

46.

In DC motor starters are used  _________

  1. To increase the starting torque
  2. To limit the starting current

Answer/ Hint      

Answer : B

Explanation :

47.

The voltage regulation of a transformer having copper loss  1%  of output and percentage reactance drop of  5%  and power factor  0.9 lagging is  __________

Answer/ Hint      

Answer : A

Explanation :

48.

The full load slip of a  4-pole, 50Hz, phase induction motor rotating at  1410 rpm  is  __________

Answer/ Hint      

Answer : C

Explanation :

49.

A 4-pole, lap wound, DC generator has the following details :

Flux = 0.07 web/pole,     speed = 900 rpm  Armature conductor  =  400

The generated  emf is  _________

Answer/ Hint      

Answer : C

Explanation :

50.

Condition for maximum power delivered in  DC generator  is  ________

Answer/ Hint      

Answer : A

Explanation :

51.

The motor applied in blowers and fans is  ___________

Answer/ Hint      

Answer : A

Explanation :

52.

The Dc motor having the high starting Torque is  ___________

Answer/ Hint      

Answer : A

Explanation :

53.

Which of the following is an AC motor 

Answer/ Hint      

Answer : D

Explanation :

54.

Which of the following information available on name plate of a motor

Answer/ Hint      

Answer : D

Explanation :

55.

Electronic sft starters are used for motors to  __________ .

Answer/ Hint      

Answer : B

Explanation :

56.

What is the unit of measure for electrical pressure or electromotive force 

Answer/ Hint      

Answer : C

Explanation :

57.

Which of the following circuit configurations has the same amount of voltage drop across each of its components 

Answer/ Hint      

Answer : A

Explanation :

58.

What is the term used to describe the ability of a device to store energy in the form of an electrical charge 

Answer/ Hint      

Answer : D

Explanation :

59.

In mutual induction, what passes between conductors in order to create voltage

Answer/ Hint      

Answer : B

Explanation :

60.

Henry is the unit of measurement for which of the following properties 

Answer/ Hint      

Answer : D

Explanation :

61.

Which of the following is an appropriate a voltmeter

Answer/ Hint      

Answer : A

Explanation :

62.

What should be observed when connecting a voltmeter into a  DC  circuit

Answer/ Hint      

Answer : C

Explanation :

63.

The speed of an  AC  motor depends on  ___________

Answer/ Hint      

Answer : C

Explanation :

64.

The basic shift register operation is  __________

Answer/ Hint      

Answer : D

Explanation :

65.

Two block  G1(s) and  G2(s) can cascaded to get resultant transfer function as  _________

Answer/ Hint      

Answer : A

Explanation :

66.

The standard 2 – input  TTL  gets for the below shown electrical symbol is  _________

Figure

Answer/ Hint      

Answer : A

Explanation :

67.

Fermi energy level for p-type extrinsic semiconductors lies  _________

Answer/ Hint      

Answer : C

Explanation :

68.

__________  is the dominant form of distortion produced by the simple push-pull amplifier

Answer/ Hint      

Answer : A

Explanation :

69.

The average voltage at the output of FWR is  ___________

Answer/ Hint      

Answer : A

Explanation :

70.

Transistor can be used to  __________

Answer/ Hint      

Answer : D

Explanation :

71.

____________  consists of two plates separated by a dielectric and can store charge

Answer/ Hint      

Answer : B

Explanation :

72.

Consider a single crystal of an intrinsic semiconductor. The number of free carriers at the fermi level at room temperature is

Answer/ Hint      

Answer : B

Explanation :

73.

A semiconductor is formed by  __________  bonds.

Answer/ Hint      

Answer : B

Explanation :

74.

gain of the transistor signifies  _________

Answer/ Hint      

Answer : A

Explanation :

75.

High frequency and impulse currents are measured using  _________

Answer/ Hint      

Answer : D

Explanation :

76.

The classical analogus of a simple level is  ____________

Answer/ Hint      

Answer : B

Explanation :

77.

Fleming’s Laft hand rule is used in  ____________

Answer/ Hint      

Answer : A

Explanation :

78.

The normal value of the armature resistance of a DC motor is equal to

Answer/ Hint      

Answer : B

Explanation :

79.

In a  DC generator commutator acts as a  __________

Answer/ Hint      

Answer : B

Explanation :

80.

In a 3-phase alternation is short circuited at it terminal, then the initial value of short circuit current will then be limited by  ________

Answer/ Hint      

Answer : C

Explanation :

81.

If the  AC  supply to transformer is replaced to DC  _________

Answer/ Hint      

Answer : A

Explanation :

82.

The principal of operation of a  3-phase induction motor is most similar to that of a  ___________

Answer/ Hint      

Answer : C

Explanation :

83.

Alternators are classified into  ___________

Answer/ Hint      

Answer : A

Explanation :

84.

According to  Lenz’s law, the induced  emf  acts up a current in which direction 

Answer/ Hint      

Answer : C

Explanation :

85.

According to Fleming’s right hand rule the thumb shows  __________

Answer/ Hint      

Answer : C

Explanation :

86.

In a pure capacitive circuit  ___________

Answer/ Hint      

Answer : A

Explanation :

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