ITI ICTSM Mock Test: Semester 1

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Created on August 07, 2022
ICTSM

ITI ICTSM- Information & Communication Technology System Maintenance -1st Sem

ICTS- Information & Communication Technology System Maintenance
Semester : 1
Module 2 : Basic Concepts of Electricity
Module 3 : Resistors, Soldering & Desoldering
Module 4 : Inductance, Capacitance & Resonance

1 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the effect on the current flow with increased diameter of conductor?

A) Resistance increases

B) Opposes more current

C) More voltage dropped

D) Allows high current flow

2 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the another name of variable resistor?

A) Fixed resistor

B) Rectifier

C) Diode

D) Potentiometer

3 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of transformer?

A) Auto transformer

B) Core type transformer

C) Shell type transformer

D) Audio frequency transformer

4 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the effect of the electrolytic capacitor, if open circuit fault occurs?

A) It will not function

B) It will burst at once

C) It will become leaky

D) It will function normally

5 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the unit of inductance?

A) Joule

B) Farad

C) Henry

D) Watts

6 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which bonding material is used for soldering a joint?

A) Oil

B) Flux

C) Acid

D) Grease

7 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the type of transformer?

A) Isolation transformer

B) Single phase transformer

C) Low frequency transformer

D) High frequency transformer

8 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which value is equal to one picofarad?

A) 106 Farad

B) 1012 Farad

C) 10-6 Farad

D) 10-12 Farad

9 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which is the cause for changing the permeability?

A) Length

B) Flux density

C) Field intensity

D) Magneto motive force

10 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which component opposes any change in current?

A) Diode

B) Resistor

C) Inductor

D) Capacitor

11 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which unit is used to measure capacitance value?

A) Mho

B) Ohm

C) Farad

D) Henry

12 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which type of capacitor is used for space electronics?

A) Plastic film type

B) Ceramic disc type

C) Electrolytic- Aluminium type

D) Electrolytic- Tantalum type

13 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Find the current (I3) using Kirchhoff’s current law?

A) 3A

B) 4A

C) 5A

D) 6A

14 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Determine the current flows through 2k ohm resistor (R2).

A) 6 mA

B) 7 mA

C) 8 mA

15 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the function of dielectric insulator in capacitor?

A) Increases the strength of capacitance

B) Prevents any current flow between plates

C) Protects from short circuitbetween the plates

D) Helps to hold the charge in capacitor for long period

16 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of the coil?

A) Iron core choke

B) Air core choke

C) Low frequency inductors

D) High frequency inductors

17 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How the value of capacitance can be decreased?

A) Increasing the plate area

B) Increasing the resistance of the plates

C) Increasing the distance between the plates

D) Using high dielectric constant material

18 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the condition of Ohm's law?

A) Constant current

B) Constant voltage

C) Constant temperature

D) Constant resistance

19 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Calculate the total capacitance value in the circuit.

A) 0.16 µF

B) 6 µF

C) 30 µF

D) 70 µF

20 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which tool works on the principle of air suction?

A) Soldering iron

B) Soldering wick

C) Desoldering braid

D) Desoldering pump

21 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the effective capacitance for three capacitors connected in parallel?

A) C1 + C2 + C3

B) C1 + C2

C) 1/C1 + 1/C2 + 1/C3

D) 1/C1 + 1/C2

22 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which material is used to make LDR for higher end requirements?

A) Cadmium sulphide

B) Lead selenide

C) Zinc sulphide

D) Copper sulphide

23 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How to determine copper loss in a transformer?

A) Ratio test

B) Impulse test

C) Short circuit test

D) Open circuit test

24 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the colour code for 100 Ω resistor?

A) Brown, black, red

B) Black, brown, black

C) Brown, black, brown

D) Brown, brown, brown

25 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which property of the capacitor stores electrical energy in electrostatic field?

A) Dielectric

B) Capacitance

C) Stray capacitance

D) Capacitive reactance

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Category: ICTSM – BS Basic Concepts of Electricity

How to calculate total resistance in three resistor connected in series?

A) R1 + R2

B) 1/R1 + 1/R2 + 1/R3

C) R1 + R2 + R3

D) 1/R1 + 1/R2

27 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which meter is used to find the exact resistance value of resistors?

A) Ammeter

B) Volt meter

C) Ohm meter

D) Watt meter

28 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which condition is called as resonance RLC circuit?

A) XL > XC

B) XC > XL

C) XL = XC

D) R < XL

29 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the main application of photo resistor?

A) Voltage rectification

B) Demodulation purpose

C) Controls of street lighting systems

D) To generate oscillations

30 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of instrument used to measure electrical quantities?

A) Meter

B) Tester

C) Micrometre

D) Vernier caliper

31 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Why ferrite core is used in radio receivers?

A) To reduce the constant losses

B) To reduce electric interference

C) To increase the quality of sound

D) To increase the efficiency of receivers

32 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How power rating is specified for transformers?

A) Watts (W)

B) Voltage (V)

C) Volt ampere (VA)

D) Horse power (HP)

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Category: ICTSM – BS Basic Concepts of Electricity

How much is the impedance of the circuit?

A) 20Ω

B) 30Ω

C) 40Ω

D) 50Ω

34 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the relationship between primary voltage (E1, V1) and secondary voltage (E2, V2) in a ideal transformer?

A) E1 = V1 and E2 = V2

B) E1 > V1 and E2 > V2

C) E1 < V1 and E2 < V2

D) E1 = V2 and E2 = V1

35 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the power dissipated if 10 mA current flows through a 10K resistor?

A) 1000 milli watts

B) 2000 milli watts

C) 3000 milli watts

D) 4000 milli watts

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Category: ICTSM – BS Basic Concepts of Electricity

Which meter uses a moving coil for measurement?

A) LCR meter

B) PMMC meter

C) MI repulsion type

D) MI attraction type

37 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of the soldering iron tip?

A) Conical

B) Pyramid

C) Chisel taper

D) Round bevel

38 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Find the total resistance value of 10 ohms and 20 ohms connected in parallel…

A) 6.666 Ohms

B) 66.66 Ohms

C) 666.6 Ohms

D) 6666 Ohms

39 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the full form of LDR in resistors?

A) Light Depending Resistor

B) Least Depending Resistor

C) Limited Diode Resistor

D) Limit Depending Resistor

40 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the unit of resonance frequency?

A) Ohm

B) Hertz

C) Volt

D) Ampere

41 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which type of transformer is used for high frequency application?

A) Ring core transformer

B) Ferrite core transformer

C) Silicon steel core transformer

D) Grain oriented core transformer

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Category: ICTSM – BS Basic Concepts of Electricity

Which metal has very good conductivity to the electric current?

A) Gold

B) Copper

C) Silver

D) Aluminium

43 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the voltage (V2) drop across the resistor R2?

A) V2 = 20 V

B) V2 = 40 V

C) V2 = 60 V

D) V2 = 80 V

44 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which is example of semiconductor material?

A) Copper

B) Germanium

C) Gold

D) Rubber

45 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the purpose of using laminated core in transformer?

A) Reduce copper loss

B) Reduce hysteresis loss

C) Reduce mechanical loss

D) Reduce eddy current loss

46 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which formula is used to calculate the impedance (z) of a RLC series circuit?

A) .

B) .

C) .

D) .

47 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of effect of changing current in one coil, induces EMF in nearby coil?

A) Coupling

B) Induction

C) Self induction

D) Mutual induction

48 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which measuring instrument is used to check the working condition of a photo resistor (LDR)?

A) Oscilloscope

B) Voltmeter

C) Ohmmeter

D) Ammeter

49 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the unit of reluctance?

A) Weber / metre2

B) Weber / metre

C) Ampere turns / Weber

D) Ampere turns / metre2

50 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the composition of steel and silicon steel in transformer core?

A) Steel 97% andSilicon 3%

B) Steel 95% andSilicon 5%

C) Steel 93% andSilicon 7%

D) Steel 90% andSilicon 10%

51 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which factor is determining the value of capacitance in capacitor?

A) Area of the plates

B) Shape of the plates

C) Material of the plates

D) Thickness of the plates

52 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which method of magnetization is used to make commercial purpose permanent magnets?

A) Induction method

B) Single touch method

C) Double touch method

D) Divided touch method

53 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the use of resistor?

A) Current increasing

B) Voltage increasing

C) Voltage drop

D) Power increasing

54 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which material is used to make photo resistors (LDR)?

A) Silicon

B) Germanium

C) Aluminium

D) Cadmium sulphide

55 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How the resonance frequency (fr) can be increased in AC series circuit?

A) Reducing the inductance value

B) Reducing the capacitance value

C) Increasing the capacitance value

D) Increasing the value of resistance

56 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How many ohms is equal to one mega ohm?

A) 10 k

B) 100 k

C) 1000 k

D) 2000 k

57 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Why the transformer core is made as thin laminations?

A) To minimize eddy current losses

B) To increase the hysteresis losses

C) To maximize eddy current losses

D) To increase core saturation losses

58 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which is used for continuity checking?

A) Ohm meter

B) Ammeter

C) Volt meter

D) Multi meter

59 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the value of each division marked by numbers on the voltmeter?

A) 1 V

B) 2 V

C) 4 V

D) 5 V

60 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which material is used as electrical insulator?

A) Gallium

B) Porcelain

C) Aluminium

D) Germanium

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Category: ICTSM – BS Basic Concepts of Electricity

Which type of transformer induced secondary voltage is lower than primary voltage?

A) Step up transformer

B) Step down transformer

C) Core type transformer

D) Shell type transformer

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Category: ICTSM – BS Basic Concepts of Electricity

Which one is having electrons?

A) Proton

B) Neutron

C) Atom

D) Nucleus

63 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which factor determines the inductance value?

A) Material of the coil

B) Diameter of the coil

C) Frequency of the current

D) Current flow through the coil

64 / 79

Category: ICTSM – BS Basic Concepts of Electricity

How the single stand wire is called?

A) Hook - up wire

B) Twisted wire

C) Wire pair

D) Multi stand wire

65 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which power loss is assessed by open - circuit test on transformer?

A) Hysteresis loss only

B) Eddy current loss only

C) Copper loss

D) Core loss

66 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Why the core of current transformer is having low reactance and low core losses?

A) To prevent high static shield

B) To minimize the error in reading

C) To minimize the burden

D) To maintain constant output

67 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Which material is used to make core of power transformer?

A) Soft iron

B) Rolled steel

C) Copper alloy

D) Cold rolled grain oriented

68 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the effect of inductance if the distance between the turns increases?

A) Increases

B) Decreases

C) Becomes zero

D) Remains same

69 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the effect on the transformer operated below the rated voltage?

A) Burn out windings

B) Leads to interwinding leakage

C) Transformer heated up excessively

D) Delivers reduced secondary voltage

70 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the full form of the abbreviation SPDT used in switches?

A) Single Phase Dual Throw

B) Single Pole Single Throw

C) Single Pole Double Throw

D) Shared Pole Double Throw

71 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the result of hysteresis loss in magnetic material?

A) Back emf increases

B) Eddy current decreases

C) Magnetic flux increases

D) Energy loss takes place

72 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the purpose of trimmer capacitor?

A) Coupling

B) Filtering

C) Decoupling

D) Fine tuning

73 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of the tool?

A) Chopper tool

B) Crimping tool

C) Soldering iron

D) Plunger de- soldering tool

74 / 79

Category: ICTSM – BS Basic Concepts of Electricity

Find the total inductance value of two inductors 10H and 15H of connected in series.

A) 05 H

B) 10 H

C) 15 H

D) 25 H

75 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the name of the type of resistor?

A) Carbon type variable Resistor

B) Fixed low wattage type Resistor

C) High wattage fixed type Resistor

D) Wire wound type variable Resistor

76 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the full form of DPDT used in switches?

A) Dual Phase Dual Throw

B) Double Pole Direct Throw

C) Direct Pole Double Throw

D) Double Pole Double Throw

77 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the capacitance value of a capacitor that requires 0.5 coulomb to charge to 35 volt?

A) 0.014 F

B) 0.025 F

C) 0.14 F

D) 0.25 F

78 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the similar term in magnetic circuit for “conductance” in electrical circuit?

A) Reluctivity

B) Permeance

C) Reluctance

D) Permeability

79 / 79

Category: ICTSM – BS Basic Concepts of Electricity

What is the advantage of using digital multimeter?

A) Accuracy

B) Linear scale

C) Non-Linear scale

D) Logarithmic scale

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