Most piston compressors use what type of valves?
A) Poppet
B) Reed
C) Sliding
D) On-off gate-type valve
B) Reed
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The three basic causes of electrical incidents include unsafe conditions, unsafe equipment, and _____.
a. unsafe acts b. unsafe or improper PPE c. lack of procedures d. unsafe weather
(Circle one) (NIOSH, OSHA) considers a gas to have adequate warning properties when its odor, taste or irritant effects are detectable and persist at concentrations below the recommended exposure level.
What will be an ideal response?
To remove the refrigerant from a system without any testing or processing and to be put back into the same system is called ____.
A. recovery B. renew C. reclaim D. recycle
Which type of thread standard uses more threads per inch?
A) National coarse (NC) B) National fine (NF) C) AHRI standard threads D) Pipe threads