08-11-2017, 07:47 PM
Solutions of objective questions.My mail id :789vinodkumar[at]gmail.com
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cl wadhwa power system objective questions with answers pdf free download
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Solutions of objective questions.My mail id :789vinodkumar[at]gmail.com
11-11-2017, 04:43 PM
Q.1 Feeder is designed primarily from the point of view of
A. Your current load capacity
B. Voltage drop in it
C. Operating voltage
D. Frequency of operation
Answer: A
Q.2 The distributors are designed from the point of view of:
A. Your current load capacity
B. Operating voltage
C. Voltage drop in it
D. operating frequency
Answer: C
Q.3 The transmission and distribution of electrical energy by an underground system is superior to the air system with respect to-
A. Appearance and public safety
B. Maintenance cost
C. Fault frequency, power failure and accidents
D. All of the above
Answer:D
Q.4 The main drawback (s) of the underground system over the air system is / are-
A. Exposure to lighting
B. Heavy initial cost
C. Exposure to atmospheric hazards such as smoke, ice, wind, etc.
D. Inductive interference between the power and switching circuit
Answer: B
Q.5 The main drawback of the supernatant system over the underground system is-
A. The underground system is more flexible than the air system
B. Higher load current
C. overvoltage problem
D. High initial cost
Answer: C
Q.6 By increasing the transmission voltage to double its original value, the same power can be sent maintaining the line loss
A. Same as original value
B. Half of the original value
C. Duplicate the original value
D. One quarter of the original value
Answer: D
Q.7 For the same voltage drop, increasing the voltage of a distributor n time-
A. Reduce the x-section of the driver by n times
B. Increase the section x of the driver by n times
C. Reduce the x-section of the driver by n ^ 2 times
D. Increase the conductor section x in n ^ 2 times
Answer: A
Q.8 The volume of copper required for an AC transmission line is inversely proportional to-
A current
B. Voltage
C. Power factor
D. Both, b and c
Answer: D
Q.9 Improving the power factor-
A. Reduce the current for a given output
B. Increase online losses
C. Increase the cost of station equipment
D. None
Answer: A
Q.10 For the same conductor length, the same amount of power, the same sand intensity, the same maximum voltage to ground, which system requires a minimum conductor area.
A. CA monophasic
B. 3 phases CA
C. 2 cables CA
D. 3 cables CA
Answer: D
Q. 11 The transmission line connects-
A. Generation station to a switching station
B. Transformer transformation station to service the transformer banks
C. Distribution transformer to consumer facilities
D. The service points to consumer permits
Answer: A
Q.12 A three-phase 4-wire system is commonly used for-
A. Primary distribution
B. Secondary distribution
C. Primary transmission
D. Secondary transmission
Answer: B
Q.13 The rated voltage of a three-phase power system is given as-
A. rms phase voltage
B. phase peak voltage
C. tension between line and line
D. rms line-to-line voltage
Answer: D
Q.14 Which of the following is not generally the generation voltage-
A. 6.6 kV
B. 9.9 kV
C. 11kV
D. 13.2kV
Answer: B
Q.15 In a transmission system, the feeder supplies power to:
A. Transformer substations
B. Service network
C. Distributors
D. All
Answer: C
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