MGVCL
VS JE EXAM PAPER-2016
[“D” code]
(Madhya Gujarat vij company ltd)
Question
No- 01
A series
motor is best suited for driving
(A) Lathes (B) Cranes and hoists
(C) Shears
and punches (D) Machine tools
Answer:-B
Question
No- 02
The
phenomenon of rise in voltage at the receiving end of the open-circuited or
lightly loaded line is called the
(A) See beck
effect (B) Ferranti effect
(C) Raman
effect (D) None of the above
Answer:-B
Question
No- 03
An
unsaturated shunt motor runs at its rated speed when rated voltage is applied
to it. If the supply voltage to the motor is reduced by 25% the speed of the
motor
(A) Increases
by 25% (B) remains the same
(C)
decreases by 25% (D) increases
slightly
Answer:-C
Question
No- 04
An over current
relay having current setting of 125% is connected to a supply circuit through a
current transformer of 400/5 A. The pick-up current is
(A) 6.25 A (B) 12.5 A
(C) 3.125 A (D) 25 A
Answer:-A
Question
No- 05
A 50 Hz,
4-pole single-phase induction motor will have a synchronous speed of
(A) 1500
r.p.m. (B) 750 r.p.m.
(C) 1200
r.p.m. (D) none of the above
Answer:-A
Solution:- Ns=120*f/P
= 120*50/2
=1500 Ans
Question
No- 06
There is a
greater possibility of occurrence of corona during
(A) Dry
weather (B) winter
(C) Summer
heat (D) humid weather
Answer:-D
Question
No- 07
Water hammer
occurs in
(A) Surge
tank (B) penstock
(C) Turbine (D) draft tube
Answer:-B
Question
No- 08
Which one of
the following load would be best driven by a d.c. compound motor?
(A)
Reciprocation pump (B)
Centrifugal pump
(C) Electric
locomotive (D) Fan
Answer:-A
Question
No- 09
A power
plant operates at an annual load factor of 80% with an average load of 120 MW.
If the load factor falls to 60%, the average load on the plant would be
(A) 200 MW (B) 160 MW
(C) 90 MW (D) 72 MW
Answer:-C
Question
No- 10
The
following electrical measuring instrument depend on chemical effect for its
action
(A) Ammeter (B) Voltmeter
(C) D.C.
Ampere - Hour meter (D) None of the
above
Answer:-C
Question
No- 11
When 3-phase
system is balanced, the neutral wire carries
(A) No
current (B) one-third of
current for each phase
(C) Half of
current for each phase (D) none
of the above
Answer:-A
Question
No- 12
Following
parameter(s) may affect the performance of a motor
(A) Voltage
unbalance & Voltage variation
(B) System
harmonics
(C) Altitude
& Ambient temperature
(D) All of
the above
Answer:-D
Question
No- 13
A 3-phase
induction motor is running at 2% slip. If the input to rotor is 1000 W, then
mechanical power developed by the motor is
(A) 20 W (B) 980 W
(C) 500 W (D) 200 W
Answer:-B
Solution:-
mechanical power developed in 3phase motor
= (1-s)*power input to rotor
= (1-0.02)*1000
Answer = 980 W
Question
No- 14
The opposite
of susceptibility is
(A) Immunity
(B) Emission
(C)
Interference (D)
Electromagnetic compatibility
Answer:-A
Question
No- 15
Load factor
of a power station is defined as
(A) Maximum
demand / average load
(B) Average
load X maximum demand
(C) Average
load / maximum demand
(D) (Average
load X maximum demand)½
Answer:-C
Question
No- 16
When load is
removed ______________motor will run at the highest speed.
(A) Series (B)
Shunt
(C)
Cumulative compound (D)
Differential compound
Answer:-A
Question
No- 17
High-speed
alternators are driven by
(A) diesel
engines (B) hydraulic
turbines
(C) steam
turbines (D) None of the
above
Answer:-C
Question
No- 18
If the
capacitance of a system is doubled, then its energy stored becomes
(A) 2 times (B) unaltered
(C) 4 times (D) none of the above
Answer:-A
Question
No- 19
As compared
to underground system, the overhead system is
(A) More
expensive (B) less flexible
(C) More
flexible (D) none of
the above
Answer:-C
Question
No- 20
In a single
phase induction motor running at a slip of 5 % with reference to forward field,
the slip with reference to backward field is
(A) 0 (B) 0.95
(C) 1.95 (D) 2.0
Answer:-C
MGVCL
VS JE EXAM
PAPER-2016 [“D” code]
(Madhya Gujarat vij company ltd)
Question
No- 21
Which of the
following has highest permeability?
(A)
Paramagnetic material (B)
Diamagnetic material
(C)
Ferromagnetic material (D)
Vacuum
Answer:-C
Question
No- 22
Ideal
voltage source have
(A) zero
internal resistance (B)
infinite internal resistance
(C) low
value of current (D)
large value of e.m.f.
Answer:-A
Question
No- 23
Any
electrical signal present in a circuit other than the desired signal is known
as
(A) Noise (B) Distortion
(C)
Interference (D) All of these
Answer:-A
Question
No- 24
The string
efficiency of a string of suspension insulators is dependent on
(A) size of
insulators (B) number of discs
in the string
(C) size of
tower (D) none of the
above
Answer:-B
Question
No- 25
An electric
iron drawing 9 A from 120 V supply mains is operated for 20 minutes, the energy
consumed is
(A) 1080 W (B) 3 Ah
(C) 0.6 kWh (D) 360 Wh
Answer:-D
Question
No- 26
The arc
voltage in a circuit breaker
(A) is in
phase with arc current (B) lags arc
current by 90°
(C) leads
arc current by 90° (D) lags arc
current by 180°
Answer:-A
Question
No- 27
A circuit
breaker is a
(A) Current
controlling device (B) circuit
interrupting device
(C) Current
limiting device (D) none of
the above
Answer:-B
Question
No- 28
The
electrical conductivity of metals is typically of the order of (in ohm-1m-1)
(A) 107
(B) 105
(C) 10-4
(D) 10-6
Answer:-A
Question
No- 29
The
following contact is largely used for low-voltage oil circuit breaker
(A) Tulip
type contacts (B) Finger and
wedge contacts
(C) Butt
Contact (D)
None of the above
Answer:-B
Question
No- 30
The normal
current in a power line is 100 A. If a short-circuit fault occurs on the line,
then one can expect the short-circuit current to be
(A) 200 A (B) 300 A
(C) More
than 1000 A (D) 100 A
Answer:-C
Question
No- 31
A short
circuit between one line and ground, very often caused by physical contact is
known as
(A)
Single-Line-to-Ground-Fault (B)
Line-to-line Fault
(C) Double
line-to- Ground-Fault (D) None
of the above
Answer:-A
Question
No- 32
The no. of
turns in a secondary coil is twice the number of turns in the primary. A cell
of 1.5 V is connected across the primary. The voltage across the secondary is
(A) 1.5 V (B) 3 V
(C) 0.75 V (D) zero
Answer:-D
Question
No- 33
A.C.
Potentiometer can be used for the following
(A)
Voltmeter calibration (B)
Ammeter calibration
(C) Testing
of energy meters and wattmeter (D)
All of the above
Answer:-D
Question
No- 34
A parallel
plate air capacitor has a capacitance of 100 pfd. A p.d of 50 V is applied. The
stored energy is …………… joules.
(A) 1.25 X
10-7 (B) 2.50 X 10-7
(C) 40 X 10-9
(D) 20 X 10-9
Answer:-A
Solution:-
energy storage (E)=1/2 cv2
=1/2*100*(50)2
=1250000 = (1.25*10-7) Ans.
Question
No- 35
What is the
efficiency of a power plant if the efficiencies of the boiler, turbine and
generator are 88,40,and 98% respectively ?
(A) 88% (B) 40%
(C) 35% (D) 98%
Answer:-C
Solution:
- (ƞ) over all efficiency= ƞboiler * ƞturbine*
ƞgenerator
=
0.88*0.40*0.98
= 0.34496 % =0.35% Ans.
Question
No- 36
Merz-Price
circulating current principles is more suitable for
(A)
Generators (B)
Transformers
(C) Both (A)
& (B) (D) None of
the above
Answer:-A
Question
No- 37
A 100 MW
power station delivers 100 MW for 2 hours. 50 MW for 6 hours and is shut down
for the rest of each day. It is also shut down for maintenance for 45 days each
year. Energy supplied per year is
(A) 12 X 104MWh
(B) 8 X 104MWh
(C) 6 X 105
MWh (D) 16 X 104 MWh
Answer:-D
Solution:-
The
generated unit on working hour= (100*2)+(50*6).
=500MWh
Operation
days in year =365-45. =320 days
in year
The
unit generated in year =500 MWh*320.
=160000 MWh
Annual
load factor= (energy consume in year/max. Demand*working hours)*100%
Question
No- 38
A power
plant with a load factor of 0.5 produces energy of 16,000 MWh with a maximum
demand of 8000 kW over a time period. For how many hours has the plant been in
operation ?
(A) 8000
hrs. (B) 4000 hrs.
(C) 8760
hrs. (D) 1000 hrs
Answer:C
Question
No- 39
An RLC
circuit has a resonance frequency of 160 kHz and a Q-factor of 100. Its band
width is
(A) 1.6 kHz (B) 0.625 kHz
(C) 16 MHz (D) None of these
Answer:-A
Solution:-
band with = resonance frequency/Q factor
=
160/100
= 1.6 kHz Ans
Question
No- 40
An inverter
circuit is employed to convert
(A) a.c.
voltage into d.c. voltage
(B) d.c.
voltage into a.c. voltage
(C) high
frequency into low frequency
(D) low
frequency into high frequency
Answer:-B
MGVCL
VS JE EXAM
PAPER-2016 [“D” code]
(Madhya Gujarat vij company ltd)
Question
No- 41
A thermal
generating station has an installed capacity of 15 MW and supplies a daily load
of 10 MW for 12 hours and 5 MW for remaining 12 hours. The plant capacity
factor for this station is
(A) 1 (B) 0.75
(C) 0.67 (D) 0.5
Answer:-D
Solution:-
plant
capacity factor = actual energy produce/max.energy have been produce
= average demand * T/plant capacity* T
=average demand / plant capacity
Note:
- all equation are same
Question
No- 42
A 132 kV
transmission line uses strings of insulators, each insulator rated at 25 kV.
The string efficiency can be maximum of 60%. The least number of insulators
required in a string is
(A) 10 (B) 9
(C) 8 (D) 6
Answer:-B
Question
No- 43
The meter
that is suitable for only direct current measurements is
(A)
Moving-iron type (B)
Permanent-magnet type
(C)
Electrodynamic type (D) Hot-wire
type
Answer:-B
Question
No- 44
A 3-phase
induction motor draws a current of 50 A from mains when started by direct
switching. If an auto transformer with 60% tapping is used for starting, the
current drawn from the mains will be
(A) 50 A (B) 18 A
(C) 36 A (D) 83.3 A
Answer:-B
Question
No- 45
Brass will
have relative permeability, μr, equal to
(A) 2000 (B) 0
(C) 1 (D) 1000
Answer:-C
Question
No- 46
In the
following Bus active and reactive powers are not specified
(A) Load Bus
(B) Generator Bus
(C) Slack
Bus (D) None of the above
Answer:-C
Question
No- 47
A generating
station has an installed capacity of 50,000 kW and delivers 220 X 10⁶ units per
annum. If the annual fixed charges are Rs.160 per kW installed capacity and
running charges are 4 paise per kWh, the cost per unit generated is
(A) 4.38
paise (B) 5.92 paise
(C) 7.64 paise
(D) 11.72 paise
Answer:-C
Solution:-
Annual
fixed charge= 160* plant capacity
= 160*50000 =Rs 80*105
Annual
running charges =Rs 0.40*220*106
= Rs 88*105
Total
annual charges = Rs (80*105+88*105)
= Rs
168*105
Cost
per unit =168*105/220*106 =0.0764 =168*105 Ans.
Question
No- 48
The current
taken from a 230 V, 50 Hz supply is measured as 10 A with a lagging p.f. of
0.7. A capacitor is connected in parallel with the load. The true power
(A) Increases
(B) decreases
(C) remains
unchanged (D) cannot be predicted
Answer:-C
Question
No- 49
An
electromagnetic field is radiated from
(A) A
stationery point charge
(B) A
capacitor with a d.c. voltage
(C) A
conductor carrying a d.c. current
(D) An
oscillating dipole
Answer:-D
Question
No- 50
A
delta-delta, 3-phase transformer bank will have a phase shift between the
primary and secondary voltages of
(A) 0° (B) 30°
(C) 90° (D) -30°
Answer:-A
Question
No- 51
If the fault
current is 2000 A, the relay setting 50% and C.T. ratio is 400/5, the plug
setting multiplier will be
(A) 15 (B) 10
(C) 25 (D) 50
Answer:-B
Question
No- 52
If the
insulation resistance of a cable of length 10 km is 1 MΩ, its insulation
resistance for 50 km length will be
(A) 0.2 MΩ (B) 2 MΩ
(C) 4 MΩ (D) 8 MΩ
Answer:-A
Solution:
- Insulation resistance of cable Rα1/length
R2/R1=L1/L2
Hence,
insulation resistance for 50 km length R2= (1*10)/50
=
0.2 MΩ
Question
No- 53
Two bulbs
which are identical consume 50 watts each when connected in parallel across a
100 V source. If the bulbs are connected in series across the same supply, they
consume
(A) 100 W (B) 50 W
(C) 75 W (D) 25 W
Answer:-B
Solution
:- the current is 0.5 times what it woud have been for a single bulb.
I2*R
means that the power is 0.52= 0.25 single bulb
Each
bulb is consume 0.25*2 =
50W Answer
Question
No- 54
An energy
meter having a meter constant of 1200 rev. per kWh is found to make 5
revolutions in 75 seconds. The load power is
(A) 500 W (B) 100 W
(C) 200 W (D) 1000 W
Answer:-C
Question
No- 55
In a 3-wire
d.c. system, the load on the +ve side is 400 A and on -ve side it is 300 A.
Then current in neutral wire is
(A) 50 A (B) 100 A
(C) 350 A (D) 150 A
Answer:-B
Question
No- 56
The
resistance between any two terminals of a balanced delta-connected load is 12Ω.
The resistance of each phase is
(A) 12 Ω (B) 18 Ω
(C) 6 Ω (D) 36 Ω
Answer:-B
Solution:
- let consider each phase of R ohm connected in delta, the equivalent resistance
between any of the two terminal is 2/3 * (R)
Here
we have 2/3*R = 12
R= 18 Ans.
Question
No- 57
An
industrial installation has a power factor of 0.8 lagging. It would be
economical to improve pf to
(A) unity (B) about 0.8
lagging
(C) about
0.95 lagging (D) about 0.95
leading
Answer:-C
Question
No- 58
An
alternator is supplying a load of 300 kW at a p.f. of 0.6 lagging. If the p.f.
is raised to unity, how many more kW can alternator supply?
(A) 200 kW (B) 100 kW
(C) 300 kW (D) 150 kW
Answer:-A
Solution
:- P= 300/0.6
=500
500-300 =200 kw more power
Question
No- 59
In an AC
circuit, the current & voltage are out of phase by 90 degrees. The ammeter
reads 2A and voltmeter reads 1000 V. The power consumed is
(A) zero (B) 2000 W
(C) 1000 W (D) 180 W
Answer:-A
Question
No- 60
A low oil
circuit breaker has the following advantage over a bulk oil circuit breaker
(A) It
requires a small space
(B) The
degree of carbonization is increased
(C)
Maintenance problems are increased
(D) None of
the above
Answer:-A
MGVCL
VS JE EXAM
PAPER-2016 [“D” code]
(Madhya Gujarat vij company ltd)
Question
No- 61
The pitch of
Arc with 96 stator slots and 6 pole is
(A) 36 (B) 16
(C) 48 (D) 32
Answer:-B
Question
No- 62
The transformer has turns ratio of 4 : 1. The
resistance of the HV winding is 8 ohms and that of the LV winding is 1 ohm. The
total resistance on HV side in ohms is
(A) 9 (B) 8.25
(C) 24 (D) 9.5
Answer:-C
Solution:
- R (HV) =8+1(HV turns/LV turns) 2
= 8+1 (4/1)2
= 24 ohm
Question
No- 63
Which of the
following capacitors preferred for high frequency circuits?
(A) Air
capacitor (B)
Electrolytic capacitor
(C) Mica
capacitor (D) None of
the above
Answer:-C
Question
No- 64
Bulk power
transmission over long HVDC lines are preferred on account of
(A) low cost
of HVDC terminals (B) no harmonic
problems
(C) Minimum
line power losses (D) simple protection
Answer:-C
Question
No- 65
A
distribution transformer costing Rs. 50,000 has a salvage value of Rs. 5000. If
annual depreciation charge is Rs. 3000 on straight line method, the useful life
of the transformer is
(A) 10 years
(B) 15 years
(C) 5 years (D) 25 years
Answer:-B
Question
No- 66
If the percentage reactance of the system up
to the fault point is 20% and base kVA is 10000, then shortcircuit kVA is
(A) 10,000
kVA (B) 50,000 kVA
(C) 500 kVA (D) 30,000 kVA
Answer:-B
Annual
depreciation expense= (cost of asset- salvage value)/useful life of asset
Question
No- 67
Which of the
following is moderator in a nuclear power reactor?
(A)
Beryllium (B) Plutonium
(C) Cadmium (D) Thorium
Answer:-A
Question
No- 68
The
following is not a basic element of a transformer
(A) Primary
winding (B) Secondary winding
(C) Mutual
flux (D) Core
Answer:-C
Question
No- 69
The
time-current graph of a fuse
(A) Has
linear characteristic (B) is a
circle
(C) Has
inverse characteristic (D) none of
the above
Answer:-C
Question
No- 70
The medium
used for arc extinction in ABCB is
(A) Oil (B) Air
(C) SF6 (D) Vacuum
Answer:-B
Question
No- 71
Which of the
following relays is used on long transmission lines?
(A)
Impedance relay (B) Mho's
relay
(C)
Reactance relay (D) None of
the above
Answer:-B
Question
No- 72
A
transformer 2000 kVA, 250 Hz is operated at 50 Hz, kVA rating should be revised
to
(A) 20,000
kVA (B) 400 kVA
(C) 10,000
kVA (D) same
Answer:-B
Question
No- 73
In a
hydroelectric project, catchment area = 5 X 10⁹ m²; annual rainfall = 1.25 m
and yield factor = 80%. The volume of water which can be utilized per annum is
(A) 2.5 X107
m³ (B) 5 X 109 m³
(C) 6.5 X
108 m³ (D) 7.5 X 106
m³
Answer:-B
Question No-
74
During a
test on 6 kVA transformer it is found that iron losses are 120 W, full load
copper losses are 200 W. The total losses at half full load will be
(A) 80 W (B) 160 W
(C) 320 W (D) 170 W
Answer:-D
Question
No- 75
A d-c shunt motor runs at rated speed. If its
field circuit gets open circuited, the motor speed
(A) Decreases
drastically (B) remains unchanged
(C) Increases
dangerously (D) fluctuates around its
previous speed
Answer:-C
Question
No- 76
Compared to
steam engines, the internal combustion engines have
(A) Much
higher thermal efficiency
(B) Almost
same thermal efficiency as that of steam engines
(C) Much
lower thermal efficiency
(D) Can have
lower or higher thermal efficiency
Answer:-A
Question
No- 77
A wave
winding must go at least ________around the armature before it closes back
where it started.
(A) Once (B) twice
(C) Thrice (D) four times
Answer:-B
Question
No- 78
In a series
circuit, under resonant condition, the following quantities are maximum
(A) Voltage
and Current (B) Current
and Power factor
(C)
Impedance and Current (D)
Impedance and Power factor
Answer:-B
Question
No- 79
A
transformer gives maximum efficiency when it operates at full load. Total
losses at full load are 400 W. Copper losses at half load are
(A) 200 W (B) 400 W
(C) 100 W (D) 50 W
Answer:-C
Solution:- total loss ( I2 *R)= 400 W
Half load I = 1/2
Cu loss (I)2R =
(1/2)2*R
= 1/4*I2R
=1/4*400 =100 Ans
Question
No- 80
The fact
that a conductor carries more current on the surface as compared to core, is
known as
(A) Skin
effect (B) Corona
(C)
Permeability (D)
Unsymmetrical fault
Answer:-A
MGVCL
VS JE EXAM
PAPER-2016 [“D” code]
(Madhya Gujarat vij company ltd)
Question
No- 81
The most
efficient form of damping employed in electrical instruments is
(A) Air
friction (B) Fluid friction
(C) Eddy
currents (D) None of the above
Answer:-C
Question
No- 82
Lenz's law
is consequence of the law of conservation of
(A) Induced
current (B) charge
(C) Energy (D) induced e.m.f.
Answer:-C
Question
No- 83
An
over-excited synchronous motor behaves as ……….
(A) A
resistor (B) An inductor
(C) A
capacitor (D) None of the
above
Answer:-C
Question
No- 84
A 1000 kVA
transformer has a reactance of 5%. Its reactance at 2000 kVA base is
(A) 5% (B) 2.5%
(C) 20% (D) 10%
Answer:-D
Solution:-
reactance of transformer at 2000 kva base
= 5*2000/1000 =10% Ans
Question
No- 85
A steam
power station has an overall efficiency of 20% and 0.6 kg of coal is burnt per
kWh of electrical energy generated. The calorific value of fuel is
(A) 7166
kcal/kg (B) 5152
kcal/kg
(C) 2458
kcal/kg (D)
none of the above
Answer:-A
Solution:-
ƞ overall = electrical output in heat units/heat of
combustion
= 0.2=
860/0.6×
= ×= 860/0.6*0.2 =7166.67 Kcal/kg
Question
No- 86
The voltage
drop is the main consideration while designing a
(A) Feeder (B) service mains
(C) Distributor
(D) none of the above
Answer:-C
Question
No- 87
The
transient phenomenon lasts in a power system for a period ranging from
(A) Few ms
to 1 s (B) 1 s to 2 s
(C) 2 s to 3
s (D) greater than 3 s
Answer:-A
Question
No- 88
Hay’s bridge
is particularly useful for measuring
(A) Inductive
impedance with large phase angle
(B) Mutual
inductance
(C) Self-inductance
(D) Capacitance
and dielectric loss
Answer:-A
Question
No- 89
The feeder
is designed mainly from the point of view of
(A) Its
current carrying capacity (B)
voltage drop in it
(C) Operating
voltage (D)
operating frequency
Answer:-A
Question
No- 90
Three
balanced delta-connected resistors consume a power of 1500 W from a symmetrical
3-phase supply. If these resistors are reconnected in star across the same
supply, the power consumed would be
(A) 1500 W (B) 4500 W
(C) 500 W (D) 1000 W
Answer:-C
Question
No- 91
Transmission
efficiency increases as
(A) Voltage
and power factor both increase
(B) Voltage
and power factor both decrease
(C) Voltage
increases but power factor decreases
(D) Voltage
decreases but power factor increases
Answer:-A
Question
No- 92
Q meters
works on the principles of
(A)
Self-inductance (B) Series
resonance
(C) Stray
magnetization (D) Corona effect
Answer:-B
Question
No- 93
The circuit
breaker must have the following rating(s)
(A) Breaking
capacity (B) making capacity
(C)
short-time capacity (D) all of the
above
Answer:-D
Question
No- 94
A voltmeter
gives 120 oscillations per minute when connected to the rotor of an induction
motor. The supply frequency is 50 Hz. The slip of the motor is
(A) 2% (B) 5%
(C) 25% (D) 4%
Answer:-D
Solution:- voltmeter is measuring 120 ocilation per
minute frequency is 120/60
=2 Hz
= slip*supply frequency= 2
Hz
= slip * 50 = 2 Hz
Slip = 2/50 =
0.04 ans
Question
No- 95
The rotor
voltage of a slip-ring induction motor gives 120 oscillations per minute when
the motor is connected to 3-phase, 50Hz supply. The percentage slip of the
rotor is
(A) 2 (B) 4
(C) 5 (D) 6
Answer:-B
Question
No- 96
A four-speed
squirrel cage induction motor uses ………… stator windings.
(A) Four (B) three
(C) One (D) two
Answer:-D
Question
No- 97
A network is
said to be nonlinear if it does not satisfy
(A) Superposition
condition
(B) Homogeneity
condition
(C) Both
superposition and homogeneity conditions
(D) Associative
condition
Answer:-C
Question
No- 98
Two coils have inductance L₁= 1200 mH and L₂ =
800 mH. They are connected in such a way that flux in the two coils aid each
other and inductance is measured to be 2500 mH then Mutual inductance between
the coils is …………… mH.
(A) 200 (B) 150
(C) 225 (D) 250
Answer:-D
Solution:- Leq = L1 + L2
+2 +M
2500=1200+800+2+M
M= 250mH
Ans.
Question
No- 99
An overhead
line conductor has a cross sectional area of 3.2 cm². It is supported on level
supports of a span of 150 m. The specific weight of the conductor is 7800
kg/m³, and the working stress is 1050 kg/cm². What is the working tension?
(A) 1560 kg (B) 2416 kg
(C) 3360 kg (D) 986 kg
Answer:-C
Question
No- 100
The name
given to that property of a material which opposes the creation of magnetic
flux in it is known as
(A)
Reluctance (B) Resistance
(C)
Permeance (D) None of the
above
Answer:-A
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