Quiz #8 Flashcards Preview

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Flashcards in Quiz #8 Deck (14)
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1
Q

A tubular fuse should always be removed from a fuse panel with __________.

A

fuse pullers

2
Q

A circuit breaker and a fuse have a basic similarity in

that they both __________.

A

should open the circuit when overloaded

3
Q

A circuit breaker differs from a fuse in that a circuit

breaker __________.

A

trips to break the circuit and may be reset

4
Q

In a cartridge-type fuse, the metal element is contained in a __________.

A

fiber tube

5
Q

Time delayed or delayed action-type fuses are designed to __________.

A

permit momentary overloads without melting

6
Q

Fuses placed in series with a thermal trip-type circuit breaker are used for __________.

A

short-circuit protection

7
Q
Fuses are rated in \_\_\_\_\_\_\_\_\_\_. 
A   voltage 
B   amperage 
C   interrupting capacity 
D   all the above
A

D all the above

8
Q
Due to the operating characteristics of the system, time
lag fuses (or dual-element fuses) are necessary for use
in \_\_\_\_\_\_\_\_\_\_.
A

motor starting circuit

9
Q

An “instantaneous-trip” type fuse will __________.

A

open as soon as the load current exceeds its set point

10
Q

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

A

D low contact resistance within the fuse

11
Q

A circuit with a blown fuse would be described as a/an

__________.

A

open circuit

12
Q

??

A

??

13
Q

In the illustration the component C is the __________. EL-0033

A

fixed contact

14
Q

In the illustration the component D is the __________. EL-0033

A

moving contact