Related Questions

Thermal overload relays are used to protect the motor against over current due to
A short-circuits
B heavy loads
C grounds
D all of the above
The single phasing relays are used for the protection of
A single phase motors only
B two phase motors only
C two single phase motors running in parallel
D three phase motors
Discrimination between main and back up protection is provided by the use of relays which are
A fact
B sensitive
C slow
D none of the above
Insurance refers to protection against an event that _________ happen whereas Assurance refers to protection against an event that _________ happen.
A May, may not
B Might, will
C Must, need not
D Will, will not
A train which travels at a uniform speed due to some mechanical fault after traveling for an hour goes at 3/5th of the original speed and reached the destination 2 hours late. If the fault had occurred after traveling another 50 miles, the train would ha
A 280
B 300
C 310
D 320
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
Relays are used for phase faults on long line.
A Impedance
B Reactance
C Either of the above
D None of the above
To protect most of the electrical equipment handling low power, the types of relays used are
A Thermocouple
B Electronic and bimetallic
C Both (A) and (B)
D None of the above
পৃথিবী পৃষ্ঠে একটি ইটের ওজন 81 N. পৃথিবীর অর্ধেক বাসার্ধের সমান উচ্চতায় এবং অর্ধেক বাসার্ধের সমান গভীরতায় ইউটির উপরে পৃথিবীর অভিকর্ষ বলের মান কত হবে?(A brick weighs 81 N on the surface of the earth. What are the earth's gravitational forces act on it at a height of half of the radius of the earth and at a depth of half of the radius of earth, respectively?)
A 36 N and 81 N
B 36 N and 40.5 N
C 36 N and 20.25 N
D 98 and 40.5 N
E 81 N and 81 N
h,J,K,L,M,N and O are the only legislators eligible to vote on Bills 1,2 and 3, each of which will be passed if at least four legislators eligible vote in favor of it. each legislator must vote on all three bills; on abstentions are possible. The following is known : *H must vote against all three bills; each of the other legislators must vote in favor of at least one bill and against at lest one bill. *j must vote against Bills 1. *O Must vote against Bills 2 and 3. * L must the same way that K dose on all three bills.*N must vote the same way that O dose on all three bills. which of the following must vote in favor of Bill 1 ?
A J
B K
C L
D O

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