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 40 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

lindahyatt42

  • Member
  • Posts: 322
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

Women are 50% to 75% more likely than men to experience an adverse drug reaction.

Did you know?

A headache when you wake up in the morning is indicative of sinusitis. Other symptoms of sinusitis can include fever, weakness, tiredness, a cough that may be more severe at night, and a runny nose or nasal congestion.

Did you know?

Although puberty usually occurs in the early teenage years, the world's youngest parents were two Chinese children who had their first baby when they were 8 and 9 years of age.

Did you know?

Bisphosphonates were first developed in the nineteenth century. They were first investigated for use in disorders of bone metabolism in the 1960s. They are now used clinically for the treatment of osteoporosis, Paget's disease, bone metastasis, multiple myeloma, and other conditions that feature bone fragility.

Did you know?

Vaccines prevent between 2.5 and 4 million deaths every year.

Negative feedback as a mechanism by which homeostatic control systems operate. Negative feedback as a mechanism by which homeostatic control systems operate.
Electric Eel Electric Eel
A thermostat stuck in the open position caused the engine to operate too cold. The vehicle failed ... A thermostat stuck in the open position caused the engine to operate too cold. The vehicle failed ...
After connecting the shutoff tool, start the engine and operate all accessories. Stop the engine ... After connecting the shutoff tool, start the engine and operate all accessories. Stop the engine ...
A roller cell-type electric fuel pump. A roller cell-type electric fuel pump.
Occupational Safety and Health Act of 1970 Occupational Safety and Health Act of 1970
Video: How antibiotics works? 💊

For a complete list of videos, visit our video library