This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: As a safety precaution, electric duct heaters should be wired so that they will not operate unless: ... (Read 19 times)

savannahhooper

  • Hero Member
  • *****
  • Posts: 576
on: Jul 24, 2018
As a safety precaution, electric duct heaters should be wired so that they will not operate unless:
 
  A) Extra heat is needed. B) Other forms of heat are not operating.
  C) The second stage of the thermostat is closed. D) The fan is operating.

Question 2

Why is there a potential of 24 V between the R terminal and the other terminals on a thermostat subbase when the thermostat is not calling?
 
  A) Thermostats are wired with both sides of 24 V. One side is supplied to the R terminal and the other to all the remaining terminals.
  B) The common side of 24 V is supplied through the coils of the devices that are not operating.
  C) The meter is reading voltage that is left in the thermostat wire from the previous operating cycle.
  D) Thermostats have battery backup, which can be read between R and the other terminals when the thermostat is not calling.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

Sweetkitty24130

  • Sr. Member
  • ****
  • Posts: 291
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

B


savannahhooper

  • Member
  • Posts: 576
Reply 2 on: Jul 24, 2018
Wow, this really help

Mochi

  • Member
  • Posts: 300
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

When Gabriel Fahrenheit invented the first mercury thermometer, he called "zero degrees" the lowest temperature he was able to attain with a mixture of ice and salt. For the upper point of his scale, he used 96°, which he measured as normal human body temperature (we know it to be 98.6° today because of more accurate thermometers).

Did you know?

Computer programs are available that crosscheck a new drug's possible trade name with all other trade names currently available. These programs detect dangerous similarities between names and alert the manufacturer of the drug.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

Engine and electric motor for the Toyota Prius Engine and electric motor for the Toyota Prius
Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d Cholelithiasis. Common sites of gallstones in the generalized condition. (a) Stones in the hepatic d
Proper bicycle safety Proper bicycle safety
Butterfly systems designed for safety and ease of use. (A) A safety shield slides down over the ... Butterfly systems designed for safety and ease of use. (A) A safety shield slides down over the ...
Bile duct system of the liver and gallbladder. Bile duct system of the liver and gallbladder.
In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ... In a Millikan experiment, a 6.89E-14 kg charged oil droplet is suspended in the electric field ...
Video: How antibiotics works? 💊

For a complete list of videos, visit our video library