1.
What is 'smothering' in extinguishing of fire ?
(a)
Adding fuel element to the fire
(b)
Isolating the fire from supply of oxygen
(c)
Using of water to lower the temperature
(d)
Removing the fuel element from the fire
2.
What is the disadvantage of solid conductor compared to stranded
conductor?
(a) Less
rigidity
(b)
Less flexibility
(c) Low
melting point
(d)
Low mechanical strength
3.
Which type of joint is used in over head lines for extending the length of
wire?
(a)
Scarfed joint
(b)
Britannia "T" joint
(c)
Western union joint
(d)
Britannia straight joint
4.
What is the name of the soldering method?
(b)
Soldering with blow lamp
(c)
Soldering with soldering gun
(d)Temperature
controlled soldering
5.
What is the cause for cold solder defect in soldering?
(a)
Excessive heating
(b)
Insufficient heating
(c)
Incorrect use of solder
(d)
High wattage soldering iron
6.
Which formula is used to calculate the power of a DC circuit?
(a)
Voltage x time
(b)
Current x voltage
(c)
Current x resistance
(d)
Voltage x resistance
7.
Calculate the hot resistance of 200W/250V rated lamp.
(a)
31.25 Ω
(b)
62.5 Ω
(c)
312.5 Ω
(d)
625 Ω
8.
What happens to the voltmeter if it is connected as an ammeter?
(a)
Low reading
(b)
No deflection
(c)
Meter burns out
(d)
Overshoot deflection
9.
What is the value of resistance in an open circuit ?
(a)
Zero
(b)
Low
(c)
High
(d)
Infinity
10.Which
resistor the lowest current flows in a parallel circuit having the values of 50
Ω, 220Ω, 450Ω and 560Ω connected with supply ?
(a)
50 Ω
(b)
220 Ω
(c)
450 Ω
(d)
560 Ω
11.
What is the specific resistance value copper conductor ?
(a)
1.72 Ohm/cm3
(b)
1.72 Micro ohm
(c)
1.72Micro ohm/cm3
(d)
1.72 Micro ohm/m
12.
Which is inversely proportional to the resistance of a conductor ?
(a)
Length
(b)
Resistivity
(c)
Temperature
(d)
Area of cross section
13.
What is the S.I unit of specific resistance ?
(a)
Ohm/cm
(b)
Ohm/m2
(c)
Ohm - m
(d)
Micro ohm/cm2
14.
Why most of semi conductor devices are made by silicon compared to germanium?
(a)
High barrier voltage
(b)
High resistance range
(c)
High thermal conductivity
(d)
High current carrying capacity
15.
How does the depletion region behave ?
(a)
As resistor
(b)
As insulator
(c)
As conductor
(d)
As semi conductor
16.
What is the output voltage if the centre tap of transformer is open circuited
in a full wave rectifier circuit ?
(a)
Zero voltage
(b)
Full rated output
(c)
Half of the rated output
(d)
One fourth of rated output
17.
Which is the example for coarse excess current protection?
(a)
MCB
(b)
MCCB
(c)
H.R.C. fuses
(d)
Rewireable type fuse unit
18.
Which is proportional for the deflection of ohmmeter needle in earth resistance
tester ?
(a)
Current in current coil
(b)
Current in potential coil
(c)
Speed of the handle rotation
(d)
Ratio of the current in two coils
19.
Which principle the earth resistance tester works?
(a)
Self induction
(b)
Mutual induction
(c)
Fall of potential method
(d)
Fleming's left hand rule
20.
Why system earthing is different in utilization than equipment earthing?
(a)
It protects human only
(b)
It protects from all circuits faults
(c) It is associated with current carrying onductors
(d) It is connected to the non current carrying metal work
(d) It is connected to the non current carrying metal work
21.
What is the effect if a person receives a shock current of 20 MA?
(a)
No sensation
(b)
Painful shock
(c)
Heart convulsions
(d)
Become unconscious
22.
Which electrical equipment 'L' series type MCB's are used?
(a) Geysers
(a) Geysers
(b)
Locomotives
(c)
Halogen lamps
(d)
Air conditioners
23.
What does the symbol marked 'X' indicate ?
(b)
Number of switches to be connected
(c)
Number of battern (or) pipe to be fixed
(d)
Number of clamps (or) clips to be fixed
24.
What is the name of BIS symbol used in layout?
(a)
One way switch
(b)
Two way switch
(c)
Intermediate switch
(d)
Multi position switch
25.
What is the name of diagram?
(a)
Wiring diagram
(b)
Circuit diagram
(c)
Layout diagram
(d)
Installation Plan
26.
Which property of magnet is illustrated?
(a)
Directive property
(b)
Induction property
(c)
Saturation property
(d)
Poles existing property
27.
Which is a paramagnetic substance?
(a)
Air
(b)
Steel
(c)
Glass
(d)
Water
28.
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
29.
What is the effect of inductance if the distance between the turns increases?
(a)
Increases
(b)
Decreases
(c)
Becomes zero
(d)
Remains same
30.
What is the function of dielectric insulator in capacitor?
(a)
Increases the strength of capacitor
(b)
Prevents any current flow between plates
(c)
Protects from short circuit between the plates
(d)
Helps to hold the charge in capacitor for long period
31.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
32.
Which type of capacitors are used in RF coupling circuit?
(a)
Tantalum
(b)
Monolithic
(c)
Electrolytic
(d)
Metalized poly propylene
33.
Which is used as a positive electrode in a dry cell?
(a)
Zinc
(b)
Carbon
(c)
Copper
(d)
Lithium
34.
What happen to the terminal voltage of a cell if load increases?
(a)
Increases
(b)
Decreases
(c)
Falls to zero
(d)
Remains same
35.
How local action defect is prevented in voltaic cell?
(a)
By connecting cells in series
(b)
By using a depolarizing agent
(c)
By connecting cells in parallel
(d)
By amalgamating the zinc plate
36.
What does the letter 'Z' indicate in the formula M=z/it ?
(a)
Time in seconds
(b)
E.C.E. of electrolyte
(c)
Amount of current in Amp
(d)
Mass deposited in grams
37.What
is the Electro Chemical Equivalent (ECE) of copper?
(a) 0.329mg/coulomb
(a) 0.329mg/coulomb
(b)
0.329mg-coulomb
(c)
1.1182mg/coulomb
(d)
1.1182mg-coulomb
38.
Which is the cause for buckling defect in lead acid battery?
(a)
Overcharging or over discharging
(b)
Charging with low rate for short period
(c)
Formation of sediments falling from the plate
(d)
Battery is kept in discharged condition for long period
39.Which
apparatus is used to check the charging condition of voltage in battery?
(a)
Voltmeter
(b)
Multimeter
(c)
Hydrometer
(d)
High rate discharge tester
40.
Which formula is used to calculate Form factor (Kf)?
(a)
Kf=(Effective value)/(Average value)
(b) Kf=(Average value)/(Effective value)
(c) Kf=(Effective value)/(Maximum value)
(d) Kf=(Average value)/(Maximum value)
(b) Kf=(Average value)/(Effective value)
(c) Kf=(Effective value)/(Maximum value)
(d) Kf=(Average value)/(Maximum value)
41.
Which formula is used to calculate the impedance(z) of a RLC series circuit?
(
a) Z = R2 + (xL-xC)2
(b)
Z= √(R2+(xL-xc))
(c)
Z= √(R+(xL-xc)
(d)
Z= √R2+(xL-xc)2
42.
What is the formula to calculate the reactive power in a 3 phase delta
connected circuit?
(a)
P=√3VL IL sinθ
(b)
P=3 Vp Ip sin θ
(c)
P =√3 VL IL cosθ
(d)
P=√3 Vp Ip cosθ
43.
What is the power factor if one of the wattmeter gives negative reading in two
wattmeter method of 3 phase power measurement?
(a)
0
(b)
0.5
(c)
Unity
(d)
Less than 0.5
44.
What is the phase displacement between phases in a 3 phase circuit?
(a)
90°
(b)
120°
(c)
180°
(d)
360°
45.
What is the reciprocal of inductance in AC parallel circuit?
(a)
Impedance
(b)
Admittance
(c)
Susceptance
(d)
Conductance
46.
Which condition is called as resonance RLC circuit?
(a)
XL>XC
(b)
XC>X L
(c)
XL=XC
(d)
R<XL
47.
What is the name of tool?
(a)
Claw hammer
(b)
Tacks hammer
(c)
Cross pein hammer
(d)
Straight pein hammer
48.
Which type of chisel is used for separating metals after chain drilling?
(a)
Flat chisel
(b)
Web chisel
(c)
Cross cut chisel
(d)
Diamond point chisel
49.
Which type of stake is used for riveting or seaming tapered cone shared
articles?
(a)
Square stake
(b)
Hatchet stake
(c)
Blow horn stake
(d)
Bevel edged square stake
50.
Which causes knot defect in timbers?
(a)
Defective storage
(b)
Uneven shrinkage
(c)
Growth of branches
(d)
Improper seasoning
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