PTAC and window unit air conditioners often use rotary ...

[ETearle]

PTAC and window unit air conditioners often use rotary compressors, which are effective but susceptible to failure due to high head pressure. What is the most common cause of high head pressure in these units?
 
  A) Metering device failure B) Dirty evaporator
  C) Dirty condenser D) Incorrect charge

Question 2

Select the lifting techniques that will reduce the possibility of injury from lifting a heavy item? Select all that apply.
 
  A) Lift slowly
  B) Use your leg muscles to do the work
  C) Use your back muscles to do the work
  D) Keep your back as straight as possible
  E) Keep your knees as straight as possible
  F) Lift quickly
  G) Keep the load close to your body

[vish98]

Answer to Question 1

C

Answer to Question 2

A, B, D, G