Electrical Four_3

In the event of a normal power supply failure, standby power for an emergency system must be available within _____.

• 10 seconds of the failure Option 1*
• 30 seconds of the failure
• 60 seconds of the failure
• 5 minutes of the failure

Legally required standby systems are covered in _____.

• NEC Article 700
• NEC Article 701
• NEC Article 702
• NEC Article 705

The field windings of an AC generator are located on the _____.

• Rotor of the generator
• Stator of the generator
• Transfer switch of the generator
• Exciter of the generator

A stator is _____.

• The rotating element of a motor or generator
• The stationary part of a motor or generator
• A device that supplies direct current
• Not a part of a motor or generator

All of the following are part of an AC generator, except a(n) _____.

• Stator
• Rotor
• Transfer switch
• Exciter

When sizing a generator set once the starting and running loads have been determined, it is common to add a margin factor for future expansion of up to _____.

• 10%
• 15%
• 25%
• 33%

In an automatic transfer switch, transfer to emergency/standby power is initiated by an external signal from a remote control.

• True
• False

The specific gravity of sulfuric acid when a battery is discharged is near _____.

• 1.10
• 1.15
• 1.20
• 1.28

How often should the intercell connections of a vented lead-acid battery bank be resistance tested with a digital low-resistance ohmmeter?

• Monthly
• Quarterly
• Annually
• Bi-annually

Each of the following is an advantage of a double-conversion UPS system, except _____

• Zero transfer time is possible
• Quiet operation
• Excellent efficiency in all applications
• Excellent frequency stability