× Didn't find what you were looking for? Ask a question
  
  
Top Posters
Since Sunday
38
s
27
9
k
8
B
7
o
7
n
7
x
6
b
6
k
6
m
5
d
5
New Topic  
jihuygu jihuygu
wrote...
Posts: 601
Rep: 0 0
4 years ago
During a planned maintenance call, technicians should check the power wiring to make sure:
 
  A) The unit is not grounded.
  B) Any resilient mounted motors are isolated from ground.
  C) The unit is grounded.
  D) A heavy wire runs from both L1 and L2 to the equipment ground.



[Ques. 2] The different types of terminal units used for hot water heating systems include:
 
  A) Baseboard heaters, convectors, fan coil units, and radiators.
  B) One-pipe and two-pipe terminal units.
  C) Heating only, cooling only, and combination heating-cooling units.
  D) Series loop, parallel loop, and reverse return loop.



[Ques. 3] Water and refrigerant flow through the coaxial coil:
 
  A) Together and are separated at the end by a separator tube.
  B) In the same direction.
  C) In opposite directions.
  D) At different times depending on the cycle.



[Ques. 4] What is the purpose of excess combustion air?
 
  A) Excess air improves the over-fire draft.
  B) Excess air is added to increase the combustion temperature.
  C) Excess air is added to improve combustion efficiency.
  D) Excess air is added to ensure complete combustion.



[Ques. 5] Which class of manufactured duct has the lowest flame spread and smoke developed ratings?
 
  A) Ductwork does not burn. B) Class 0
  C) Class 1 D) Class 2
Read 634 times
7 Replies
Replies
Answer verified by a subject expert
brandelynbrandelyn
wrote...
Posts: 361
Rep: 2 0
4 years ago
Sign in or Sign up in seconds to unlock everything for free
1)  C

2)  A

3)  C

4)  D

5)  B
1

Related Topics

jihuygu Author
wrote...
4 years ago
I can't even begin to explain how much your help meant to me.
Anonymous
wrote...
2 weeks ago
👍🏾
wrote...
A week ago
TY :)
wrote...
A week ago
Thanks
wrote...
A week ago
Thank you so much
wrote...
A week ago
Thx
New Topic      
Explore
Post your homework questions and get free online help from our incredible volunteers
  121 People Browsing
 484 Signed Up Today
Related Images
  
 300
  
 165
  
 110