Fuse MCQ | HRC fuse MCQ

21. Regarding HRC fuses which statement is not correct?

  1. They do not deteriorate with time
  2. They have inverse time current characteristics
  3. Operation of the fuse is very reliable
  4. It is not required to be replaced after each operation.
Answer
Answer. d

22. Fusing factor of a fuse is defined as the ratio of

  1. Maximum fusing current to the prospective current
  2. Maximum fusing current to the cutoff current
  3. Minimum fusing current to the rated carrying current
  4. Maximum fusing current to the rated carrying current
Answer
Answer. c

23. The rating of fuse wire is always expressed in

  1. Ampere-hours
  2. kWh
  3. Amperes
  4. None of the above
Answer
Answer. c

24. According to fuse law, the current carrying capacity varies as

  1. diameter
  2. (diameter)1.5
  3. (diameter)0.5
  4. None of these
Answer
Answer. b

25. Fuse material must have

  1. High melting point and high specific resistance
  2. Low melting point and high specific resistance
  3. Low melting point and low specific resistance
  4. High melting and low specific resistance
Answer
Answer. c

26. A fuse is provided in an electric circuit for

  1. Safeguarding the installation against heavy current
  2. Reducing the current flowing the circuit
  3. Reducing the power consumption
  4. All options are correct
Answer
Answer. a

27. How should a fuse be installed in a circuit to insure proper operation?

  1. Parallel to the load
  2. Series with the load
  3. In any way possible
  4. At the ground point
Answer
Answer. b

28. Which among these fuse is very fast in operation?

  1. Semiconductor fuses
  2. High rupturing capacity fuse
  3. Cartridge type
  4. Kit kat type
Answer
Answer. a

29.  A good fuse wire must have

  1. High melting point
  2. High ohmic losses
  3. High conductivity
  4. High deterioration
Answer
Answer. c

30. Fusing current is the

  1. Maximum current at which the fuse element will get heated
  2. Rated current of a fuse
  3. The minimum current at which the fuse element will get heated
  4. The maximum current at which the fuse element will melt
Answer
Answer. d
Pages: 1 2