Technician A says that when air is charged to a trailer with a spring brake priority system, it is directed to the hold-off chambers of the spring brakes BEFORE the reservoirs are charged. Technician B says that when a trailer is equipped with a spring brake priority system the air tanks must be fully charged with air before the parking brakes can be released. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: A
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The most commonly used code for pressure vessels and nuclear components is ____________________.
Fill in the blank(s) with the appropriate word(s).
Which type of relief valve used on a turbocharged engine is noisy?
A) Bypass valve B) Dump valve C) Blow Off Valve (BOV) D) Both B and C
The refrigerants that a particular recovery unit is designed for can be determined by:
A) Trying different refrigerants, measuring the unit amp draw, and comparing it against the nameplate. B) Recovery machines must work with all refrigerants to be EPA certified. C) Looking for the ARI/UL certification label. D) Measuring the pressure and temperature of the refrigerant in the recovery unit and comparing them to a saturated pressure-temperature chart.
What part of an atom has a negative charge?
A. quark B. neutron C. proton D. electron