Regarding refrigeration accessories, which of the following is false?
a) the pressure gauge range must be at least 1.2 times the design working pressure
b) an accumulator is used to prevent liquid refrigerant from entering the compressor suction
c) a sight glass should be installed on the receiver
d) a filter-drier should be installed at inlet of the condenser
e) a change of color in sight glass is an indication of moisture
Answer: D