× Didn't find what you were looking for? Ask a question
Top Posters
Since Sunday
e
4
h
4
h
4
m
3
d
3
B
3
o
3
w
3
H
3
a
3
c
3
k
3
Home Q & A Board Other Fields Homework Help Trades and Apprenticeship
New Topic  
Hoshuia Hoshuia
wrote...
Go to Answer
Posts: 527
Rep: 0 0
6 years ago
The difference between 80 efficiency furnaces and a 90 efficiency furnaces is that 90 efficiency furnaces
 
  A) use more efficient air filters
  B) use more combustion air per 1000 Btu firing rate
  C) have an extra recuperative heat exchanger that condenses water out of the flue gas
  D) burn more gas to increase the heat exchanger temperatures

 Q. 2

Unbalanced seals have a _____ face loading than balanced seals.
 
  a. lower
  b. higher
  c. lighter
  d. more evenly distributed

 Q. 3

A sequencer might be utilized:
 
  A) In repetitive processes B) In training new welders
  C) On thin metals D) For increased weld pool size
Read 50 times
3 Replies
Replies
Answer verified by a subject expert
FakeUserFakeUser
wrote...
#1
Top Poster
Posts: 527
Rep: 1 0
6 years ago
Sign in or Sign up in seconds to unlock everything for free
1

Related Topics

Hoshuia Author
wrote...
#2
6 years ago
Thanks ... 100% Correct  Thumbs Up Sign
wrote...
#3
6 years ago
You're very welcome
New Topic      
Quick Reply
Explore
Post your homework questions and get free online help from our incredible volunteers
  1067 People Browsing
Start New Topic Take the Tour CoursesNew Study Tools Topics Trending Browse by Textbook
Live Chat
Related Images
  
 367
  
 1540
  
 1058
Your Opinion
Which of the following is the best resource to supplement your studies:
Votes: 300
Previous poll results: Which is the best fuel for late night cramming?