Author Question: 200-pound air handler is to be suspended by four threaded rods with a spring-mounted vibration ... (Read 56 times)

stock · **on:** Jul 24, 2018

200-pound air handler is to be suspended by four threaded rods with a spring-mounted vibration isolator
on each rod. What weight rating (in pounds) of the vibration isolators should be used?

a. 200
b. 100
c. 75
d. 50

Question 2

Connectors that can be used with copper and aluminum conductors will be marked _____.

a. all-conductor
b. universal
c. AL-CU
d. AL-approved