ONLINE ELECTRICAL ENGINEERING will contain ELECTRICAL ENGINEERING QUESTIONS & ANSWERS,ELECTRICAL INTERVIEW QUESTION & ANSWERS and important topics from ELECTRICAL MACHINES, POWER SYSTEMS ,POWER ELECTRONICS AND DRIVES and other ELECTRICAL ENGINEERING SUBJECTS.Objective tests will be conducted periodically which would be useful for exams like POWERGRID , NTPC ,NHPC ,ENGINEERING SERVICES ,IES ,ETC..FEEL FREE TO ASK YOUR DOUBTS REGARDING ELECTRICAL SUBJECTS.
Sunday, March 16, 2014
ONLINE ELECTRICAL ENGINEERING TEST - 4
Hi all.Please take up the Electrical Engineering Test-4.The test contains the questions which were asked in some competitive exams.Some questions are problematic and others are theoretical. Though most of the questions are theoretical it would be helpful in understanding the basic concepts of electrical engineering.We have been preparing questions ourselves, so that it is useful for all Electrical Engineers.Online Electrical Engineering team will be coming up with more tests :) Your valuable comments are welcome to improve the quality of the tests.
1. A consumer with the industrial load has a daily load pattern of 2000 kW,.8 lag for 12 hours and 1000 kW at UPF for 12 hours.What is the load factor ?.
2. What is the maximum load which consume 500kWh per day at a load factor of .40, if the consumer increases the load factor of .50 without increasing the maximum demand ?
3. A consumer consumes 600 kWh per day at a load factor of .40. What is the energy comsumed by the consumer if the load factor is increased to .70 without increasing the maximum demand ?
A) 1100 kWh
B) 950 kWh
C) 1050 kWh
D) 1000 kWh
ANSWER :
C) 1050 kWh
EXPLANATION :
Load Factor = (Average load * time) / (maximum load * time)
.40 = ((600 * 1000) / (maximum load*24)
maximum laod = 600000/ (.4*24)= 62.5 kW
Energy consumed in kWh = Load Factor * Maximum Energy Consumed
= .70 * 62.5 * 24
= 1050 kWh
4. A loss less line terminated with its surge impedance has
A) transmision line angle is greater than actual length of line
B) flat voltage profile
C) transmission line angle is less than the actual length of line
D) both A) and B)
ANSWER :
B) flat voltage profile
5. An RLC series circuit remains predominantly inductive
A) above resonance frequency
B) at resonance frequency
C) below resonance frequency
D) at the lower half power frequency
ANSWER :
A) above resonance frequency
6. If the excitation of the synchronous generator fails, it acts as a
A) induction motor
B) synchronous motor
C) synchronous generator
D) induction generator
ANSWER :
D) induction generator
7. The use of high speed circuit breakers
A) increases system stability
B) reduces short circuit current
C) increases short circuit current
D) decreases system stability
ANSWER :
A) increases system stability
8. Resistance switching is normally employed in ?
A) bulk oil breakers
B) minimum oil breakers
C) all breakers
D) air blast circuit breakers
ANSWER :
D) air blast circuit breakers
9. Plug setting of a relay can be altered by varying
A) adjustable back up stop
B) air gap of magnetic path
C) number of ampere-turns
D) none of these
ANSWER :
C) number of ampere-turns
10. If the time of operation of a relay for unity TMS is 12 secs, the time of operation for 0.6 TMS will be
2 comments:
thats good qns thanks man ...
increase the qns 100 to 150 daily...
plz upload more qns ...
question is very good. its more beneficial for competitive exam . plz increase number of question.
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