Question

14. The sound-level rating unit MOST commonly used to del b. decibel kilohertz sone ohm d. 15. Recent changes in the NEC establish two methods for grounding the electric dryers and ranges, depending on whether it is an installation for track ligt voltamper toot a. b. primary or secondary 30-ampere or 50-ampere EMT or BX new or existing 5 18. Disconnecting requirements for a dryer are detailed primarily in Section of the NEC This completes er reviewing lope prov stofresat c. 220 370 422 810 Countertop receptacles for appliances in kitchen must be supplied by Two ampere circuits bi 20 25 30 Wochen are figured with a value of circuit when calculating fonders and services volt amper for anch2 wire

Answer 1

Qn.14) option C is correct.

The sone is a unit of loudness. Fan noise rating are expressed in sones.

decibel is the noise of sound measurement, hertz is the unit of frequency and ohm is the unit of resistance.

Qn.15) option D is correct.

depending on new or existing installation there are two methods for grounding the frames of electric dryers and ranges.

EMT(Electrical metallic tubing) is a conduit and BX( Basic armoured cable) is a cable.

Qn.16) option C is correct.

NEC 422 includes Appliances. In this section disconnecting requirements for a dryer are detailed.

NEC 220 includes branch circuit,feeder and service calculations.

NEC 370 includes boxes, conduit bodies and fittings general installations.

NEC 810 includes radio and television equipments.

Qn.17) option B is correct.

ampere receptacles used for countertop kitchen must be supplied by atleast two 20 ampere circuits (210-11(c)(1) and 220-16(a))

Qn.18) option C is correct.

Small appliance circuits are calculated at 1500 VA each.