Lnunes UA Local 467 Chapter 20 Quizizz

All building automation system controllers should be wired in accordance with the ___ and local regulations.

• Occupational Safety and Health Administration (OSHA)

• American National Standards Institute (ANSI)

• National Electrical Code® (NEC®)

• International Electrotechnical Commission (IEC)

Operator interfaces commonly require installation ___" above the finished floor for viewing by maintenance personnel.

• 48

• 60

• 72

• 84

A DIN rail is a flat mounting rail that is attached to a ___.

• mounting point

• control panel

• battery

• power supply

A common building automation system controller mounting requirement includes separate building automation system controller conductors and power conductors by at least ___.

• 1

• 2

• 3

• 5

According to the NEC®, a Class 2 power-limited transformer is limited to ___ VA to reduce the shock hazard to humans.

• 45

• 50

• 75

• 100

A(n) ___ loop is a circuit that has more than one point connected to earth ground, with a voltage potential difference between the two ground points high enough to produce a circulating current in the ground system.

• open

• closed

• ground

• resistance

Facilities with critical systems use ____ for controllers in important building systems to allow the facilities to continue to operate during brief power failures.

• uninterruptible power supplies

• step-up transformers

• backup batteries

• isolated power supplies

The most common building automation system controller power supply is a ____ step-down transformer.

• 120 VAC to 24 VAC

• 190 VAC to 100 VAC

• 230 VAC to 120 VAC

• 320 VAC to 210 VAC

A(n) ____ is a flat rail attached to a control panel and used for mounting.

A(n) _____ is a circuit that has more than one point connected to earth ground, with a voltage potential difference between the two ground points high enough to produce a circulating current in the ground system.