Quiz #8 Flashcards
A tubular fuse should always be removed from a fuse panel with __________.
fuse pullers
A circuit breaker and a fuse have a basic similarity in
that they both __________.
should open the circuit when overloaded
A circuit breaker differs from a fuse in that a circuit
breaker __________.
trips to break the circuit and may be reset
In a cartridge-type fuse, the metal element is contained in a __________.
fiber tube
Time delayed or delayed action-type fuses are designed to __________.
permit momentary overloads without melting
Fuses placed in series with a thermal trip-type circuit breaker are used for __________.
short-circuit protection
Fuses are rated in \_\_\_\_\_\_\_\_\_\_. A voltage B amperage C interrupting capacity D all the above
D all the above
Due to the operating characteristics of the system, time lag fuses (or dual-element fuses) are necessary for use in \_\_\_\_\_\_\_\_\_\_.
motor starting circuit
An “instantaneous-trip” type fuse will __________.
open as soon as the load current exceeds its set point
A fuse will blow for all the listed reasons EXCEPT
__________.
A excessive vibration
B extremely hot surroundings
C loose fuse clips
D low contact resistance within the fuse
D low contact resistance within the fuse
A circuit with a blown fuse would be described as a/an
__________.
open circuit
??
??
In the illustration the component C is the __________. EL-0033
fixed contact
In the illustration the component D is the __________. EL-0033
moving contact
