Switchgear protections

31. The fuse blows off by

burning
arcing
melting
none of the above

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href="https://exam.pscnotes.com/mcq/the-fuse-blows-off-by/#more-54028">Detailed SolutionThe fuse blows off by

32. H.R.C. fuses provide best protection against

overload
reverse current
fuses provide best protection against A. overload B. reverse current C. open-circuits
short-circuits

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against" class="read-more button" href="https://exam.pscnotes.com/mcq/h-r-c-fuses-provide-best-protection-against/#more-53757">Detailed SolutionH.R.C. fuses provide best protection against

33. Overfluxing protection is recommended for

distribution transformer
generator transformer of the power plant
auto-transformer of the power plant
station transformer of the power plant

Detailed SolutionOverfluxing protection is recommended for

34. The main function of a fuse is to

protect the line
open the circuit
protect the appliance
prevent excessive currents E. none of the above

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64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube is to" class="read-more button" href="https://exam.pscnotes.com/mcq/the-main-function-of-a-fuse-is-to/#more-53435">Detailed SolutionThe main function of a fuse is to

35. A short-circuit is identified by

no current flow
heavy current flow
voltage drop
voltage rise

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by" class="read-more button" href="https://exam.pscnotes.com/mcq/a-short-circuit-is-identified-by/#more-53380">Detailed SolutionA short-circuit is identified by

36. What will be the reflection co-efficient of the wave of load connected to transmission line if surge impedance of the line is equal to load ?

Zero
Unity
Infinity
None of the above

Detailed SolutionWhat will be the reflection co-efficient of the wave of load connected to transmission line if

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surge impedance of the line is equal to load ?

37. Ionization in circuit breaker is facilitated by

high temperature
increase of mean free path
increasing field strength
all of the above

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facilitated by" class="read-more button" href="https://exam.pscnotes.com/mcq/ionization-in-circuit-breaker-is-facilitated-by/#more-53057">Detailed SolutionIonization in circuit breaker is facilitated by

38. The fuse rating is expressed in terms of

current
voltage
VAR
kVA

Detailed

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64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube

SolutionThe fuse rating is expressed in terms of

39. When a transmission line is energized, the wave that propagates on it is

current wave only
voltage wave only
both (A) and (B)
power factor wave only

Detailed SolutionWhen a

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transmission line is energized, the wave that propagates on it is

40. By which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?

Radiation
Convection
fuse is dissipated ? A. Radiation B. Convection C. Conduction
All of the above

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the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?" class="read-more button" href="https://exam.pscnotes.com/mcq/by-which-of-the-following-methods-major-portion-of-the-heat-generated-in-a-h-r-c-fuse-is-dissipated/#more-51877">Detailed SolutionBy which of the following methods major portion of the heat generated in a H.R.C. fuse is dissipated ?
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