Which is an advantage of ac over dc power?

a. ac voltage can be transformed into other voltages through transformers.

b. ac voltage is more easily used in the home.

c. ac circuits are safer.

d. it's easier to produce ac voltage with a portable, chemical battery.

its a

The correct choice is

A. AC voltage can be transformed into other voltages through transformers.

Explanation:

We can convert an AC Voltage to other higher or lower voltage making use of a step up or step down transformer. Electricity is transferred over long distances at high voltages as the losses are minimum at high voltage. The electricity can not be used in households at such high voltage. So the high voltage is converted to low voltage using transformers. This can only be done in case of AC Power.

nec chapter 5 contains

c. information on special occupancy areas

nec chapter 6 covers

a. special equipment

which of the following rules contain the words shall or shall not and must be adhered to?

b. mandatory rules

which of the following rules identify actions that are allowed but not required and typically cover options or alternative methods?

c. optional rules

which of the following serves as the introduction to the nec and provides an overview of the book?

a. nec article 90

organizations that test products for safety are

c. nrtls

the nec is published by the

a national fire protection association

the nec is divided into

b. 9 chapters

the nec provides informative annexes for

c. informational materials and examples

two terms from nec article 100 that trainees should become familiar with are

b. labeled and listed

explanation:

= initial pressure

= final pressure = 2

= initial volume

= final volume = /4

= initial temperature = 20 c = 20 + 273 = 293 k

= final temperature = ?

using the equation