Author Question: A technician takes the following readings while checking the operation of an electric furnace with ... (Read 157 times)

WhattoUnderstand · **on:** Jul 26, 2018

A technician takes the following readings while checking the operation of an electric furnace with two heat strips: 220 V, 36 A, 70F return air temperature, and 120F supply air temperature. What is the airflow through the furnace?

A) = = 540 CFM B) = = 158 CFM
C) (120 70 ) 1.08 10 = 540 CFM D) = = 500 CFM

Question 2

An anemometer is used to measure:

A) Feet of water for water flow calculations. B) Volume of air for air volume calculations.
C) Feet of air for air velocity calculations. D) Rotational speed.