The major concern with ammonia refrigerant is:
A) It is much more expensive than halogenated refrigerants.
B) It is poisonous and flammable.
C) It can only be used with copper, brass, and aluminum.
D) Its normal operating pressures are extremely high.
B
You might also like to view...
Concrete for some strip footings may be placed in trenches without the use of forms if the soil is _____.
a. sandy b. very cohesive c. very moist d. compacted
The proper color of a gas flame is ____.
A. sharp all blue B. lazy all blue C. blue with slight orange tips D. lazy with yellow tips
Excessive negative camber will cause which of the following?
A) Inner tire wear B) Improper handling C) Excessive wheel bearing loading D) All of these are correct.
The voltage gain of an OTA can be calculated using the formula:
A) AV= (Rf/Ri) + 1. B) AV= gmRL. C) AV= Rf/Ri. D) AV= 2 Rf/Ri.