Unit 5 Flashcards
Where should you look for any signs of rubbing on an exciter?
Between the rotor and the stator
What color will a transformer turn if it gets too hot?
Shade of yellow or brown
Which type of circuit breaker responds instantaneously when an excess of current flows through the breaker?
Magnetic
Which relay component provides a constant restraining force keeping the armature in the normal (deenergized position)
Spring
Which relay component is completely self-contained and has no moving parts?
Solid-state
The closing assembly of a circuit breaker usually consists of
closing coil or motor and a control switch
Which ohmmeter reading indicates that a fuse is good and no further testing is necessary?
Zero
In what type of weather can a static charge be most hazardous?
Dry, cold weather
At what voltage can static charges ignite gasoline fumes?
1500
What function does a static ground serve?
To dissipate or reduce unwanted electrical charges in hazardous areas to ground
What function do equipment grounds serve?
To connect all noncurrent carrying metal parts of an electrical system to ground
When installing a star ground, what is the best approach to lower resistance and reactance at the same time?
Increase the number of conductors while keeping their lengths short
It is important to use straight conductors when installing grounds because a curved conductor
can cause inductance.
Before making a ground connection to a water pipe, check for the
presence of electric current
The purpose of bonding the generators neutral and ground is to
provide a path for electricity to ground in the event of a fault
You will bond the generator’s neutral and ground if you are providing
prime power generation and a standby generator with a switch neutral
Which automatic transfer switch control sends a signal to transfer the load to generator power?
Transfer control
When conducting a visual inspection of an automatic transfer switch, what should you do if you find a problem with a component?
Replace it immediately
What automatic transfer switch adjustment could be set to zero if the generator has a built-in shutdown timer?
Engine shutdown delay
When installing an automatic transfer panel, what do you have to ensure when double-checking your work?
Ensuring phase rotation is correct and that all connections are tight
