wireman/electrical
1.Scribers
are used for marking on_____________
A.
paper B. card board C. glass D.
hylam ,bakelite boards
2.
Center punch is used for_____________
A.
witness marks. B. making marks to
give good seating for the drill bit. C
. making light punch marks to position dividers D
.all the above
3. What will happen if bar magnet is broken/ cut
into two pieces?
a)
Each piece will become a separate magnet having north and south pole
b) Magnetic property will be destroyed in both
the pieces completely.
c)
Longer piece only will have magnetic property with north and south pole on
either end.
d)
One piece will have only north pole and the other piece will have only south
pole
4.
A material that is slightly repelled by a magnet is called………..
a)magnetic b) paramagnetic c)
diamagnetic d) ferromagnetic
5. A substance that has low retentivity can be used for the manufacture of ………..
a) electromagnects b) permanent magnets c) bar magnets d)paramagnets
6.The
symbol for inductance is …………..
a)H b)
L c)X d)Z
7. The total capacitance of two 10 µF capacitors
connected in parallel is ……….
a) 5µF b)
10µF c)20µF d)100µF
8. What is meant by phase voltage?
a)it is the voltage across the phases U and V,
V and W,
W and U b)It is the voltage across the phases U or
V c)The voltage measured between two
lines or conductors of single phase alternator
d) the voltage which is always in phase with the
current.
9.
what is electricity?
a)flow
of neutron b) flow of proton c) flow of current d) flow of electron
10.oppose
the flow of electric current is called?
a)conductor b)resistance c) voltage d)none of
this
11.unit
of voltage is
a)volt
meter b)ammeter c) volt d)ampere
12.
normal output voltage of carbon zinc cell
a)1.2v b)1.5v c)2.0v d)2.2v
13.nickel
iron cell is__________
a)a
wet secondary cell b)a
dry secondary cell c) a dry primary cell d)
a wet primary cell
14.the
hydrometer is used to determine the _________of the electrolyte
a)specific
gravity b)external gravity c)normal gravity d)self gravity
15.three
resistance 1k ohm, 2k ohm, 7k ohm are
connected in series with a 30v supply the total resistance and current are
a)10k
ohm, 3A b) 10k ohm, 300mA
c) 10k ohm, 3mA d) 10k ohm, 30A
16.efficiency
of half wave rectifier
a)41.6 b)40.6 c)42.6 d)43.6
17.example
of semiconductor material is______
a)silicon
b)carbon c)gold d)silver
18.
the process of adding impurities to a pure semiconductor is known as______
a)diffusion b)forming c)etching d)doping
19.frequency
of alternating current in India
a)20hz b)30hz c)40hz d)50hz
20.what
is the use of lamp holder
a)straighten b)bending c)holding d)inclining
21. fuse is a short piece of metal connecting
---------- to the circuit.
a)
parallal b) series c) combinational d) none of these
22.
ohm’s law relates
a)voltage,
current ,capacitance b)voltage ,current, inductance c)voltage, current,
resistance
d)voltage,
current ,ampere
23.which
purpose used in carbon tetra chloride?
a)avoid
shock effect b) fire extinguisher c)fire making effect d)none of this
24.the function of flux in soldering
is_____
a. to clean the dirt on the soldering
surface b. to lower the melting
temperature of solder c.for easy flow of
solder in to the joint d. all the above
25.the
fundamental unit of measurement of resistance____
a.
milliohm b. ohm c. megaohm d.
kiloohm
26.which
resistor is commonly used for general purpose applications
a.
carbon resistors b. wire wound
resistors c. metal
film d. carbon film resistors
27.colour
code resistance value of yello-violet-orange-silver
a.37k
ohm 5% b.73k ohms 10% c. 47k ohm 10% d. 74k ohm 5%
28.the
relation ship between resistance(R),Current(I),voltage(V)
A. V=I/R B. R=V/I C.
I= V/R D. V/R=I/R
29.
relationship between charge (Q), voltage(V), capacitance (C)
A. C=Q/V B. C=QV C. C=Q2V D. C=V/Q
30.
PIV across each diode of bridge rectifier is
a.
2Vs(rms) b. 2Vs(peak)
c. Vs(rms) d. .Vs(peak)
31.
the basic unit of capacitance is___
a.
ohm b. farad. C. henry d. capacitance
32.the
entire group of magnetic line is called_____
a.
flux density b. magnetic flux c. total flux d. flux distribution
33.the
phenomenon of induced magnetism lagging behind the magnetizing force is known
as_____
a.
reluctance b. hysteresis c. permeability d. eddy current effect
34.the
property of an inductor is
a.
accumulate electric charge. B. oppose
sudden change in current c stop current
passing through it d. allow AC but
block DC
35.
unit of inductance is________
a.
farad b. webber c.
henry d. hertz
36.in
a closed loop, the sum of voltage drops across components is equal to
a.
the applied voltage b. half the applied
voltage c. zero d. twice the applied
voltage
37.The most commonly used electrical
conductor is.....
a.lead b. tin c. brass
d. copper
38.Coper is used popularly as a
conductor beacause......
a,It is cheaper than silver b. it has
low resistivity c.it can be drawn in to
thin sheets d.all above
39.Current carriying capacity of a wire
depends upon ..............
a.the size of the conductor b. type of material used c.number of strands of conductors used
d.all the above
40.Solder is a special mixture
of...............
a.copper & lead b.tin &lead c. copper &tin d. tin &flux
41.The most suitable ratio of tin &
lead in solder for electronic work is............
a. 50/50
b. 40/60 c. 60/40 d.70/30
43.The shape of prohibition signs
is......
a.Triangular b. Circular c. Square d. Oblong
44.The requirment of combustion are.....
a.fuel & oxygen b. fuel
&heat c. Heat & oxygen d.fuel, heat &oxygen
45.The reason of electric fire
is..............
a.loose of connection b. over
loading c. low rated fuse d. all the
above
46.Atomic weight is equal to.....
a.total number of electron b.
sum of proton &electron c. total
number of proton d.sum of proton
&neutron
47.The unit of current is.....
a.volt b. ampere c.coloumb d.hertz
48.same rating Cells are connected in
parallel, effective current rate_________
A) same as individual b. difference of them c. sum of individual d. none of this
49. kirchhoff’s first law is also known
as______
a. voltage law b. current law c. resistance
law d. none of these
50.law of electrolysis by________
a. Maxwell b. Faradays c. Lenz d. Flemings
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