The major concern with ammonia refrigerant is:

A) It is much more expensive than halogenated refrigerants.
B) Its normal operating pressures are extremely high.
C) It is poisonous and flammable.
D) It can only be used with copper, brass, and aluminum.


C

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When an S-cam foundation brake slack adjuster is in the fully applied position, ideally the slack adjuster-to-pushrod angle should be:

A. less than 90 degrees B. Exactly 90 degrees C. More than 90 degrees D. It does not matter.

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Technician Asays ISO flare fittings may have a different pitch thread depending on the make and model of the vehicle. Technician B says ISO flares tend to seal better while using more torque on the threaded nut. Who is correct?

A. A only B. B only C. Both A and B D. Neither A nor B

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The dimensions of the fireplace base depend upon the size of the firebox as well as the outer hearth extension.

Answer the following statement true (T) or false (F)

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The key used on a calculator to represent division is:

A. ΒΈ B. + C. * D. #

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