Electrician Mostly Asked MCQ PDF Part Five 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 After Stage First Result.
1.The capacity of capacitor bank used in power factor correction is expressed in terms of
A.kW
B.kVA
C.kVAR
D.volts
Answer-C
2.While testing a capacitor with ohm-metre, if the capacitor shows charging, but the final resistance reading is appreciably less than normal, it can be concluded that the capacitor is
A.short-circuited
B.open circuited
C.alright
D.leaky
Answer-D
3.If a 6 uF capacitor is charged to 200 V, the charge in coulombs will be
A.800 uC
B.900 uC
C.1200 uC
D.1600 uC
Answer-C
4.Which capacitor will be physically smaller for the same ratings ?
A.Ceramic capacitor
B.Paper capacitor
C.Both will be of equal size
D.None of these
Answer-A
5.What is the value of capacitance that must be connected in parallel with 50 pF condenser to make an equivalent capacitance of 150 pF ?
A.50 pF
B.100 pF
C.150 pF
D.200 pF
Answer-B
6.A mica capacitor and a ceramic capacitor both have the same physical dimensions. Which will have more value of capacitance ?
A.Ceramic capacitor
B.Mica capacitor
C.Both will have identical value of capacitance
D.It depends on applied voltage
Answer-A
7.Which of the following material has least value of dielectric constant ?
A.Ceramics
B.Oil
C.Glass
D.Paper
Answer-B
8.Which of the following capacitors will have the least value of breakdown voltage ?
A.Mica
B.Paper
C.Ceramic
D.Electrolytic
Answer-D
9.The breakdown voltage for paper capacitors is usually
A.20 to 60 volts
B.200 to 1600 volts
C.2000 to 3000 volts
D.more than 10000 volts
Answer-B
10.Dielectric constant for mica is nearly
A.200
B.100
C.3 to 8
D.1 to 2
Answer-C
11.The value of dielectric constant for vacuum is taken as
A.zero
B.1
C.4
D.10
Answer-B
12.Which of the following capacitors is marked for polarity ?
A.Air
B.Paper
C.Mica
D.Electrolytic
Answer-D
13.Which of the following capacitors can be used for temperature compensation ?
A.Air capacitor
B.Ceramic capacitor
C.Paper capacitor
D.None of these
Answer-B
14.Which of the following statements is incorrect ?
A.The thinner the dielectric, the more the capacitance and the lower the voltage breakdown rating for a capacitor .
B.A six dot mica capacitor colour coded white, green, black, red and yellow has the capacitance value of 500 pF
C.Capacitors in series provide less capacitance but a higher voltage breakdown rating for the combination
D.A capacitor can store charge be¬cause it has a dielectric between two conductors
Answer-B
15.Paper capacitors usually have a tolerance of
A.± 5%
B.± 10%
C. ± 15%
D.± 20%
Answer-B
16.For closer tolerances which of the following capacitors is usually preferred ?
A.Paper capacitor
B.Mica capacitor
C.Ceramic disc capacitor
D.None of these
Answer-B
17.The electrostatic force between two charges of one coulomb each and placed at a distance of
0.5 m will be
(a) 36 x 10 N
(b) 36 x 10⁷ N
(c) 36 x 10⁸ N
(d) 36 x 10⁹ N
Answer-D
18.The units of volume charge density are
A.Coulomb/metre
B.Coulomb/metre
C.Coulomb/metre
D.Coulomb/metre
Answer-C
19.”The surface integral of the normal component of the electric displacement D over any closed surface equals the charge enclosed by the surface”. The above statement is associated with
A.Gauss’s law
B.Kirchhoff s law
C.Ohm’s law
D. Lenz’s law
Answer-A
20.Dielectric strength of mica is
A.10 to 20 kV/mm
B.30 to 50 kV/mm
B.50 to 200 kV/mm
C.300 to 500 kV/mm
Answer-C
21.The dielectric constant (relative permittivity) of glass is given by
A.0.1 to 0.4
B.0.5 to 1.0
C.2.0 to 4.0
D.5 to 100
Answer-D
22.Capacitors are mainly used for radio frequency tuning.
A.Paper
B.Air
C.Mica
D.Electrolytic
Answer-B
23.capacitors are used in transistor circuits.
A.Ceramic
B.Paper
C.Air
D.Electrolytic
Answer-A
24.Capacitors are used for audio frequency and radio frequency coupling and tuning.
A.Air
B.Mica
C.Plastic film
D.Ceramic
Answer-B
25.The inverse of capacitance is called
A.reluctance
B.conductance
C.susceptance
D.elastance
Answer-D
