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 41 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
:D TYSM

sailorcrescent

  • Member
  • Posts: 334
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

« previous next »
 

Did you know?

Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.

Did you know?

As many as 20% of Americans have been infected by the fungus known as Histoplasmosis. While most people are asymptomatic or only have slight symptoms, infection can progress to a rapid and potentially fatal superinfection.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.

Engine and electric motor for the Toyota Prius Engine and electric motor for the Toyota Prius
Building competency in safety Building competency in safety
Vacutainer brand safety lock needle holder. Vacutainer brand safety lock needle holder.
A funnel helps in hearing if the electric fuel pump inside the gas tank is working. A funnel helps in hearing if the electric fuel pump inside the gas tank is working.
A typical direct-injection system uses two pumps—one low-pressure electric pump in the fuel tank ... A typical direct-injection system uses two pumps—one low-pressure electric pump in the fuel tank ...
Electric Light Orchestra (ELO) - Telephone Line + Lyrics Electric Light Orchestra (ELO) - Telephone Line + Lyrics
Video: Transferring genes into plants Animation

For a complete list of videos, visit our video library