Question

19. It is safest to use a thermostat'with a(n). switch to control the 240 V lines to anelectric baseboard heating unit. A. airflow B. double-pole C. low-current DIP D. single-pole 20. Electric heating system service includes the following tasks, except . A. cleaning corroded terminals B. cleaning grilles and ducts C. oiling the heating elements D. tightening loose terminals

Answer 1

19)option B

Double pole switch can bear 240 V range line voltages most safely

20)option C

Oiling of elements is required to reduce friction in moving parts and heating elements are stationary part .