burning
arcing
melting
none of the above
Answer is Right!
Answer is Wrong!
Switchgear protections
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
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
35. A short-circuit is identified by
no current flow
heavy current flow
voltage drop
voltage rise
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
37. Ionization in circuit breaker is facilitated by
high temperature
increase of mean free path
increasing field strength
all of the above
Answer is Right!
Answer is Wrong!
Detailed SolutionIonization in circuit breaker is facilitated by
38. The fuse rating is expressed in terms of
current
voltage
VAR
kVA
Answer is Right!
Answer is Wrong!
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
Answer is Right!
Answer is Wrong!
Detailed SolutionWhen a 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
Answer is Right!
Answer is Wrong!