Electric Motors Controls BOMA Pre-Quiz
QUESTIONS AND ANSWERS
How does a U.P.S. (Uninterruptible power supply) work? - ANSWER>>AC
rectified to DC batteries then Inverted to AC
Batteries energy capacity is measured in? - ANSWER>>Amp-hours
Batteries have two rated values. - ANSWER>>Voltage and amp-hours
How do you top off water in a battery cell? - ANSWER>>Distilled water
when the level is below the plate.
A voltage monitor relay is used for? - ANSWER>>Starting backup
generators.
Fuel for diesel generators is often stored in a? - ANSWER>>Day tank
_____ converts between electrical and mechanical power. -
ANSWER>>Motor, Generator, alternator.
The field winding on a generator: - ANSWER>>Produces the magnetic
field.
The stationary members of a generator is called a - ANSWER>>Stator
A motor - ANSWER>>Converts electrical energy into mechanical energy.
an armature is - ANSWER>>The movable portion of a contractor.
In a process control, delay is: - ANSWER>>The time it takes for a change
in the process to be felt.
, What is the difference between a contactor and a starter? - ANSWER>>A
starter has overload protection
How is a holding circuit wired? - ANSWER>>Stop push buttons I series,
Start push buttons in parallel,
Using a holding contact.
What protects circuits from short circuits? - ANSWER>>Breakers
Soft-starts work by? - ANSWER>>Lowering voltage during start up
When a starter has a built in disconnect, we call it a? -
ANSWER>>Combination starter
Normally closed means? - ANSWER>>There is continuity when the
component is on the shelf
What is an example of a P.E. Switch? - ANSWER>>Pressure operated
electric switch.
The input and output power of a transformer is rated in? - ANSWER>>KVA
A soft start is used to? - ANSWER>>Reduce starting current
AC motor speed is determined by? - ANSWER>>The number of poles.
DC arcs. - ANSWER>>Are the most difficult to extinguish.
Arc chutes. - ANSWER>>Help confine the arcs.
The lower the NEMA rating on a contactor - ANSWER>>The lower the
current it can handle
The current rating of a contactor. - ANSWER>>The max current for each
contact.
QUESTIONS AND ANSWERS
How does a U.P.S. (Uninterruptible power supply) work? - ANSWER>>AC
rectified to DC batteries then Inverted to AC
Batteries energy capacity is measured in? - ANSWER>>Amp-hours
Batteries have two rated values. - ANSWER>>Voltage and amp-hours
How do you top off water in a battery cell? - ANSWER>>Distilled water
when the level is below the plate.
A voltage monitor relay is used for? - ANSWER>>Starting backup
generators.
Fuel for diesel generators is often stored in a? - ANSWER>>Day tank
_____ converts between electrical and mechanical power. -
ANSWER>>Motor, Generator, alternator.
The field winding on a generator: - ANSWER>>Produces the magnetic
field.
The stationary members of a generator is called a - ANSWER>>Stator
A motor - ANSWER>>Converts electrical energy into mechanical energy.
an armature is - ANSWER>>The movable portion of a contractor.
In a process control, delay is: - ANSWER>>The time it takes for a change
in the process to be felt.
, What is the difference between a contactor and a starter? - ANSWER>>A
starter has overload protection
How is a holding circuit wired? - ANSWER>>Stop push buttons I series,
Start push buttons in parallel,
Using a holding contact.
What protects circuits from short circuits? - ANSWER>>Breakers
Soft-starts work by? - ANSWER>>Lowering voltage during start up
When a starter has a built in disconnect, we call it a? -
ANSWER>>Combination starter
Normally closed means? - ANSWER>>There is continuity when the
component is on the shelf
What is an example of a P.E. Switch? - ANSWER>>Pressure operated
electric switch.
The input and output power of a transformer is rated in? - ANSWER>>KVA
A soft start is used to? - ANSWER>>Reduce starting current
AC motor speed is determined by? - ANSWER>>The number of poles.
DC arcs. - ANSWER>>Are the most difficult to extinguish.
Arc chutes. - ANSWER>>Help confine the arcs.
The lower the NEMA rating on a contactor - ANSWER>>The lower the
current it can handle
The current rating of a contactor. - ANSWER>>The max current for each
contact.
