Download Basic Electricity TEST 2 For Railway ALP CBT II Exam
We are glad to provide basic electricity questions for Railway ALP/TECHNICIAN CBT II exam which help you to improve preparation. It is Important for all competitive exam like SSC GD, RRB Group D, SSC CGL , and Many more…. . You can download PDF by Clicking the given link below
1.The direction of an a/c current:-
a.Keep changing
b.Can not be found
c.Keep reversing periodically
d.Is fixed
2.The advantage of a circuit breaker over a fuse when compared:-
a.Never needs replacing
b.Responds faster to over loads
c.Always eliminates the need of a switch
d.It will take over load for a short period
3.Which of the following material has nearly zero co efficient of resistance?
a.Copper
b.Carbon
c.Manganin
d.Mica
4.You have to replace a 1500 ohm resister in a ratio you have no 1500 ohm resister but have several 1000 ohm ones which you would connect in :-
a.Three in parallel
b.Three in series
c.Two in parallel and one in series
d.Two in parallel
5.In parallel circuit all components must
a.Have same value of voltage
b.Have same P D across them
c.Carry equal currents
d.Carry same current
6.The e.m.f of a given cell is
a.Distributed
b.Variable
c.Constant
d.Less than terminal potential defiance
7.Parallel grouping of cells yields maximum current when external resistance:-
a.Equals internal resistance per cell
b.Is greater than internal resistance of battery
c.C.equals internal resistance of the battery
d.Is less than the internal resistance of the battery
8.A simple potential meter is correctly called is a :-
a.Current divider
b.Variable resister
c.Voltage divider
d.Voltage ptafilizer
9.Aluminum can be classified as a ___________ material:-
a.Paramagnetic
b.Diamagnetic
c.Ferrite
d.Soft magnetic
10.The magnetizing force produced by a solenoid depends on :-
a.The number of its terms
b.The current carried by it when P.D applied
c.Its length
d.All of the above
11.Ferrites are ceramic materials are called :-
a.Paramagnetic
b.Diamagnetic
c.Ferromagnetic
d.Productivity
12.Permeance of a magnetic circuit given by the reciprocal of its:-
a.Permeability
b.Reluctance
c.Flux density
d.Productivity
13.An e.m.f is induced in the coil whenever the flux through it
a.Is decreased
b.Is increased
c.Is abruptly reduced to zero
d.All the above
14.Hysteresis loss in a magnetic materials due to its:-
a.Retentivity
b.Coercivity
c.Flux density
Both (a) and (b)
15.The delay in establishment of steady current through the coil depends on the value of :-
a.Applied voltage
b.Self inductance
c.Resistance
d.(a) and (c)
16.The initial rate of rise of current through a coil is:-
a.Inversely dependent on the applied voltage
b.Minimum
c.Same as the rate of decay
d.Independent of the inductance
17.When a parallel A.C circuit is in resonance it:-
a.Draws maximum current from the source
b.Offer minimum resistance
c.Is called a rejector circuit
d.Have no branch current
18.When ever a magnet is quickly brought towards an open circuited stationary coil:-
a.A current is induced in it
b.Work has to be done
c.E.M.F is induced in it
Power is spent
19.The direction of induced e.m.f in a coil may be found with the help of
a. Flemings left hand rule
b. Lenz’s law
c. Faraday’s law
d. Steinamety law
20.The capacitance does not depends upon which factor :-
a.Plate area
b.Nature of di-electric
c.Plate thickness
d.Distance between the plates
21.A good conductor of electricity is one that:-
a.Has Low conductance
b.Is made of copper wire
c.Produces minimum voltage drop
d.Has few free electrons
22.Which of the following statement is true, both for series and parallel d.c circuit:-
a.Voltage are additive
b.Currents are additive
c.Power’s are additive
Elements have individual current
23.In practice earth is choosen as a place of zero electric potential because it:-
a.Is non conducting
b.Is easily available
c.Keeps loosing or gaining electric charges every day
d.Has almost constant zero potential
24.The working voltage of a capacitor in A.C circuit should be:-
a.Equal to the highest applied voltage
b.At least 20% greater than the highest applied voltage
c.At least 50% greater than the highest applied voltage
d.None of the above
25.Mutual inductance between the two magnetically coupled coil depends on:-
a.The number of their turns
b.Permeability of the core
c.Cross sectional area of their common core
d.All of the above
26.Permanent magnets are normally made of
a.High permeable material
b.Wrought iron
c.Cost iron
d. Alnico alloys
27.Those materials are well suited for making permanent magnets which have
a.High retentivity and low coercivity
b.High retentivity and high coercivity
c.Low retentivity and low coercivity
d.Low retentivity and high coercivity
28.In a magnetic material hysteresis loss takes place primarily due to:-
a.Flux density laggings behind magnetizing force
b.Molecular friction
c.Its high retentivity
d.Rapid reversals of its magnetization
29.The rate of current through an inductive coil is maximum:-
a.After one time constant
b.At the start of the current flow
c.Near the final maximum steady value
d.At 63.2% of its maximum steady value
30.Unless otherwise specified any value given for current or voltage in an ac circuit are assumed to be :-
a.Instantaneous value
b.Effective or r.m.s values
c.Maximum values
Average values
31.When relatively high capacitance is required in a small capacitor we use:-
a.Ceramic capacitor
b.Paper capacitor
c.Electrolytic capacitor
d.Mica capacitor
32.When relatively high capacitance is required in a small capacitor we use:-
a.Ceramic capacitor
b.Paper capacitor
c.Electrolytic capacitor
d.Mica capacitor
33.The potential difference between two conductors which are insulated from each other is measured in:-
a.Amperes
b.Ohms
c.Colombs
d.Volts
34.In how many ways 3 identical resistors can be connected:-
a.1
b.5
c.3
d.4
35.When relatively high capacitance is required in a small capacitor we use:-
a.Ceramic capacitor
b.Paper capacitor
c.Electrolytic capacitor
d.Mica capacitor
36.Which particle of an atom actually moves in the production of electric current:-
a.The protons
b.The neutrons
c.The electrons
d.All three
37.The term that describes the combined resistive force in an ac circuit is:-
a.Resistance
b.Capacitance
c.Total resistance
d.Impedance
38.An increase in which of the following factors will cause an increase in the inductive reactance of a circuit
a.Capacitance and voltage
b.Inductance and frequency
c.Voltage and resistance
d.Resistance and capacitive reactance
39.The unit of capacitive and inductive reactance is:-
a.Farad and henry
b.Ohm and henry
c.Farad and ohm
d.Ohm and ohm
40.The maximum value of charge in a capacitor reached at:-
a.2 time constant
b.3 time constant
c.4 time constant
d.6 time constant
ANSWER:-
1. c 2.d 3.c 4.c 5.b 6.c 7.c 8.c 9.a 10.d
11.c 12.b 13.d 14.d 15.d 16.c 17.c 18.c 19.b 20.c
21.c 22.c 23.d 24.c 25.d 26.d 27.b 28.d 29.b 30.b
31.c 32.d 33.d 34.d 35.b 36.c 37.d 38.b 39.d 40.d
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