Electrician Mostly Asked MCQ PDF Part 9
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Attempt Free Electrician Mostly Asked MCQ PDF Part 9 Here. Read The Important Electrical MCQ From Below.
Electrician Mostly Asked MCQ PDF Part Nine For RRB ALP/Technician CBT 2
Here we are providing mostly asked MCQ PDF of Electrician Trade For RRB ALP/Technician CBT 2 stage exam, It will be provide help to aspirants who are going to appear this exam. Next part will be upload tomorrow.
RRB ALP/Technician CBT 2 Online Test Series Will Be Start Shortly.
1.Conductivity is analogous to
A. retentivity
B. resistivity
C. permeability
D. inductance
Answer-C
2.In a magnetic material hysteresis loss takes place primarily due to
A. rapid reversals of its magnetization
B. flux density lagging behind magnetizing force
C. molecular friction
D.it high retentivity
Answer-D
Electrician Mostly Asked MCQ PDF Part 9
3.Those materials are well suited for making permanent magnets which have______ retentivity and _______coercivity.
A. low, high
B. high, high
C. high, low
D. low, low
Answer-B
4.If the area of hysteresis loop of a material is , the hysteresis loss in this material will be
A. zero
B. small
C. large
D. none of these
Answer-C
5.Hard steel is suitable for making permanent magnets because
A.it has good residual magnetism
B. its hysteresis loop has large area
C. its mechanical strength is high
D. its mechanical strength is low
Answer-A
Electrician Mostly Asked MCQ PDF Part 9
6.Silicon steel is used in electrical machines because it has
A. low co-ercivity
B. low retentivity
C. low hysteresis loss
D. high co-ercivity
Answer-C
7.Conductance is analogous to
A. permeance
B. reluctance
C. flux
D. inductance
Answer-A
Electrician Mostly Asked MCQ PDF Part 9
8.The property of a material which opposes the creation of magnetic flux in it is known as
A. reluctivity
B. magnetomotive force
C. permeance
D. reluctance
Answer-D
9.The unit of retentivity is
A. weber
B. weber/sq. m
C. ampere turn/metre
D. ampere turn
Answer-B
Electrician Mostly Asked MCQ PDF Part 9
10.Reciprocal of reluctance is
A. reluctivity
B. permeance
C. permeability
D. susceptibility
Answer-B
11.While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit ?
A. E.m.f.
B. Current
C. Current density
D. Conductivity
Answer-B
12.The unit of reluctance is
A. metre/henry
B. henry/metre
C. henry
D. 1/henry
Answer-D
Electrician Mostly Asked MCQ PDF Part 9
13.A ferrite core has less eddy current loss than an iron core because
A. ferrites have high resistance
B. ferrites are magnetic
C. ferrites have low permeability
D. ferrites have high hysteresis
Answer-D
14.Hysteresis loss least depends on
A. volume of material
B. frequency
C. steinmetz co-efficient of material
D. ambient temperature
Answer-D
Electrician Mostly Asked MCQ PDF Part 9
15.Laminated cores, in electrical machines, are used to reduce
A. copper loss
B. eddy current loss
C. hysteresis loss
D. all of these
Answer-B
16.”The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity”.
The above statement is associated with
A. Newton’s law
B. Faraday’s law of electromagnetic
C. Faraday’s law of electrolysis
D. Gauss’s law
Answer-C
17.The charge required to liberate one gram equivalent of any substance is known as______ constant
A. time
B. Faraday’s
C. Boltzman
D. permeability
Answer-B
Electrician Mostly Asked MCQ PDF Part 9
18.During the charging of a lead-acid cell
A. its voltage
B.it gives out energy
C. its cathode becomes dark chocolate brown in colour
D. specific gravity of H2SO4 decreases
Answer-A
19.The capacity of a lead-acid cell does not depend on its
A. temperature
B. rate of charge
C. rate of discharge
D. quantity of active material
Answer-B
20.During charging the specific gravity of the electrolyte of a lead-acid battery
A. increases
B. decreases
C. remains the same
D. becomes zero
Answer-A
Electrician Mostly Asked MCQ PDF Part 9
21.The active materials on the positive and negative plates of a fully charged
A. lead-acid battery are
B. lead and lead peroxide
C. lead sulphate and lead
D. lead peroxide and lead
Answer-C
22.When a lead-acid battery is in fully charged condition, the colour of its positive plate is
A. dark grey
B. brown
C. dark brown
D. none of above
Answer-C
23.The active materials of a nickel-iron battery are
A. nickel hydroxide
B. powdered iron and its oxide
C.21% solution of KOH
D. all of these
Answer-D
Electrician Mostly Asked MCQ PDF Part 9
24.The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is
A. just one
B. always greater than one
C. always less than one
C. none of the
Answer-B
25.The best indication about the state of charge on a lead-acid battery is given by
A. output voltage
B. temperature of electrolyte
C. specific gravity of electrolyte
D. none of these
Answer-C
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