Fuse Objective Questions Answers

A fuse in a motor circuit provides protection against

a) Short Circuit
b) Over Load
c) Open circuit
d) Both Short Circuit and Over Load

A

The delay fuses are used for the protection of:

a) Lighting circuits
b) Motors
c) Induction loads
d) Capacitive loads

B

The fuse blows off by:

a) Arcing
b) Burning
c) Melting
d) Any one of the above

C

The material used for the fuse wire should be of:

a) Low resistivity and high melting point
b) High resistivity and high melting point
c) High resistivity and low melting point
d) Low resistivity and low melting point

C

A material best suited for the manufacture of the fuse is:

a) Silver
b) Copper
c) Aluminium
d) Zinc

A

Heat generated in the HRC fuse is dissipated mainly through:

a) Radiation
b) Convection
c) Conduction
d) All the above

C

The relation between the fusing current (I) and diameter (d) of the fuse wire is:

a) I α d
b) I α 1/d
c) I α d^3/2
d) I α d^1/2

C

Which of the following material is more susceptible to oxidation: 

a) Silver
b) Copper
c) Tin and Lead alloy
d) None of the above

B