Question is ⇒ Poles which carry transformers are usually, Options are ⇒ (A) circular, (B) I-type, (C) A-type, (D) H-type, (E) none of the above, Leave your comments or Download question paper.

Question is ⇒ Poles which carry transformers are usually, Options are ⇒ (A) circular, (B) I-type, (C) A-type, (D) H-type, (E) none of the above, Leave your comments or Download question paper. Previous question Next question


Q1.	Poles which carry transformers are usually
A.	circular [Wrong Answer]
B.	I-type [Wrong Answer]
C.	A-type [Wrong Answer]
D.	H-type [Correct Answer]
E.	none of the above [Wrong Answer]
View Answer 9 -9 Explanation:- Answer : D Discuss it below : !! OOPS Login [Click here] is required to post your answer/result Help other students, write article, leave your comments

Previous question Next question

Also Read Similar Questions Below :

⇒ Corona usually occurs when the electrostatic stress in air around the conductor exceeds
6.6 kV (r.m.s. value)/cm
11 kV (r.m.s. value)/cm
22 kV (maximum value)/cm
30 kV (maximum value)/cm

⇒ In A.C.S.R. conductors, the insulation between aluminium and steel conductors is
insulin
bitumen
varnish
no insulation is required

⇒ There is a greater possibility of occurence of corona during
dry weather
winter
summer heat
humid weather

⇒ To increase the capacity of a transmission line for transmitting power which of the following must be decreased ?
Capacitance
Line inductance
Voltage
All of the above

⇒ The operating voltage of extra high tension cables is upto
66 kV
11 kV
33 kV
66 kV

⇒ Which of the following regulations is considered best ?
0.5
0.2
0.1
0.02

⇒ By which of the following factors is the sag of a transmission line least affected ?
Current through the conductor
Ice deposited on the conductor
Self weight of conductor
Temperature of surrounding air

⇒ A circuit is disconnected by isolators when
line is energized
there is no current in the line
line is on full load
circuit breaker is not open

⇒ A 3-phase 4 wire system is commonly used on
primary transmission
secondary transmission
primary distribution
secondary distribution

⇒ Ground wire is used to
avoid overloading
give the support to the tower
give good regulation
connect, a circuit conductor or other device to an earth-plate

⇒ The area of cross-section of the neutral in a 3-wire D.C. system is generally ____ the area of cross-section of main conductor
same as
one-fourth
one half
double

⇒ If the voltage is increased x times, the size of the conductor would be
reduced to 1/x² times
reduced to 1/x times
increased x times
increased to x² times

⇒ The distributors for residential areas are
single phase
three-phase three wire
three-phase four wire
none of the above

⇒ The size of the earth wire is determined by
the atmospheric conditions
the voltage of the service wires
the ampere capacity of the service wires
none of the above

⇒ Earthing is necessary to give protection against
danger of electric shock
voltage fluctuation
overloading
high temperature of the conductors

⇒ For transmission of power over a distance of 200 km, the transmission voltage should be
132 kV
66 kV
33 kV
11 kV

⇒ The effect of corona can be detected by
presence of zone detected by odour
hissing sound
faint luminous glow of bluish colour
all of the above

⇒ A booster is a
series wound generator
shunt wound generator
synchronous generator
none of the above

⇒ The colour of the neutral of three-core flexible cable is
blue
brown
red
black

⇒ Which of the following D.C. distribution system is the simplest and lowest in first cost, ?
Radial system
Ring system
Inter-connected system
None of the above

⇒ Pin type insulators are generally not used for voltages beyond
1 kV
11 kV
22 kV
33 kV

⇒ The surge resistance of cables is
20 ohms
50 ohms
200 ohms
300 ohms

⇒ Which of the following can be used for bus-bars ?
Tubes
Rods
Bars
Any of the above

⇒ If the height of transmission tower is increased, which of the following; parameters is likely to change ?
Capacitance
Inductance
Resistance
All of the above

⇒ Impedance relay is used on ____ transmission lines
short
medium
long
all

⇒ Which of the following characteristics should the line supports for transmission lines possess ?
Low cost
High mechanical strength
Longer life
All of the above

⇒ Which of the following is the main advantage of A.C. transmission system over D.C. transmission system ?
Less instability problem
Less insulation problems
Easy transformation
Less losses in transmission over long distances

⇒ The cause of damage to the lead sheath of a cable is
crystallisation of the lead through vibration
chemical action on the lead when buried in the earth
mechanical damage
all of the above

⇒ The following system is not generally used
1-phase 3 wire
1-phase 4 wire
3-phase 3 wire
3-phase 4 wire

⇒ The charging current in the cables
leads the voltage by 180°
leads the voltage by 90°
lags the voltage by 90°
lags the voltage by 180°