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

Author Question: Why would a preheat coil be used on the energy-recovery wheel? A) To dry the intake air B) To ... (Read 148 times)

clippers!

  • Hero Member
  • *****
  • Posts: 828
on: Jul 24, 2018
Why would a preheat coil be used on the energy-recovery wheel?
 
  A) To dry the intake air B) To prevent moisture transfer to the supply air
  C) To prevent frost from forming on the wheel D) To warm the exhaust air

Question 2

Most heat pumps have two metering devices because:
 
  A) Two metering devices allow two stage operation.
  B) Each coil must function as the evaporator during one of the cycles.
  C) Two metering devices allow for extra refrigerant flow at low outdoor temperatures.
  D) One metering device serves as a backup to the primary metering device.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

leahm14

  • Sr. Member
  • ****
  • Posts: 322
Reply #1 on: Jul 24, 2018
Answer to Question 1

C

Answer to Question 2

B


clippers!

  • Hero Member
  • *****
  • Posts: 828
Reply #2 on: Jul 24, 2018
TY


leahm14

  • Sr. Member
  • ****
  • Posts: 322
Reply #3 on: Jul 24, 2018
You're welcome


« previous next »
 

Did you know?

Thyroid conditions may make getting pregnant impossible.

Did you know?

Most strokes are caused when blood clots move to a blood vessel in the brain and block blood flow to that area. Thrombolytic therapy can be used to dissolve the clot quickly. If given within 3 hours of the first stroke symptoms, this therapy can help limit stroke damage and disability.

Did you know?

Individuals are never “cured” of addictions. Instead, they learn how to manage their disease to lead healthy, balanced lives.

Did you know?

Elderly adults are living longer, and causes of death are shifting. At the same time, autopsy rates are at or near their lowest in history.

Did you know?

The use of salicylates dates back 2,500 years to Hippocrates’s recommendation of willow bark (from which a salicylate is derived) as an aid to the pains of childbirth. However, overdosage of salicylates can harm body fluids, electrolytes, the CNS, the GI tract, the ears, the lungs, the blood, the liver, and the kidneys and cause coma or death.

Neuropeptides and Peripheral Peptides Involved in Control of Food Intake and Metabolism Neuropeptides and Peripheral Peptides Involved in Control of Food Intake and Metabolism
Energy of reactant molecules. Energy of reactant molecules.
A magnetic sensor uses a permanent magnet surrounded by a coil of wire. The notches of the ... A magnetic sensor uses a permanent magnet surrounded by a coil of wire. The notches of the ...
An overhead camshaft engine equipped with variable valve timing on both the intake and exhaust ... An overhead camshaft engine equipped with variable valve timing on both the intake and exhaust ...
An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has ... An athlete stretches a spring an extra 40.0 cm beyond its initial length. How much energy has ...
how much energy is needed to heat 77.0g H2O(s) from -10.0 C to 0.0 C? how much energy is needed to heat 77.0g H2O(s) from -10.0 C to 0.0 C?
Video: Electrocardiogram Examination

For a complete list of videos, visit our video library