ONLINE QUIZ ON "DISTRIBUTION SYSTEMS"
1. Which
type of system is generally adopted for the generation and transmission of
electrical power?
3
phase 4 wire
2
phase 3 wire
3
phase 3 wired
None
of these
Answer: 3 phase 3 wired
2. Which
of these systems uses the 3 phase 4 wire system?
Secondary
transmission.
Primary
distribution
Secondary
distribution
Primary
transmission
Answer: Secondary distribution
3. Line
efficiency increases for ___________________ transmission voltages.
Lower
Higher
Both
(a) and (b)
None
of these
Answer: Higher
4. The
most important disadvantage of using the high voltage for transmission is
The
increased cost of insulating the conductors.
The
increased cost of transformers, switchgear and the other terminal apparatus.
Both
(a) and (b).
There
is a reduction in the corona loss.
Answer: Both (a) and (b).
5. The
most suitable practical value of secondary distribution is?
11 KV
33 KV
800V
230V/400V
Answer: 230V/400V
6. The
volume of copper required in case of two wire single phase mid point earth ac
overhead systems is how many times to that of two wired dc overhead system
?
2/cos^2
φ
1/2
cos^2 φ
1.457/
cos^2 φ
6/1.457
cos^2 φ
Answer: 2/cos^2 φ
7. What
is the main reason for using the high voltage for the long distance power
transmission?
Reduction
in the time of transmission.
Increase
in system reliability.
Reduction
in the transmission losses
None
of these.
Answer: Reduction in the
transmission losses
8. Which
component connects the substation to the area where power is to be
distributed?
Distributors
Service
mains
Feeders
All of
these
Answer: Feeders
9. Name
the cable which connects the distributor to the consumer terminals.
Distributors
Service
mains
Feeders
All of
these
Answer: Service mains
10. In the
design of a distributor which of the following is the major
consideration?
Current
carrying capacity
Voltage
drop
Frequency
KVA
system
Answer: Voltage drop
11. In the
design of a Feeder which of the following is the major consideration?
Voltage
drop
Frequency
KVA
system
Current
carrying capacity
Answer: Current carrying
capacity
12. 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
Answer: One half
13. Which
of the following is not the distribution system normally used.
3
phase-3 wire
3
phase-4 wire
Single
phase - 3 wire
Single
phase -4 wire.
Answer: Single phase -4 wire.
14. What
is the main advantage of ring main system over radial system? i. Voltage drop
in the feeder is less. ii. Power factor is higher. iii. Supply is more
reliable. Which among the above statements are correct?
i and
ii only
ii and
iii only
i and
iii only.
i, ii
and iii.
Answer: i and iii only.
15. Which
distribution system is energized by two or more generating stations or
substations?
Radial
systems.
Interconnected
systems.
Ring
main systems
All of
these.
Answer: Interconnected systems.
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