Which of the following is a correct statement regarding pipe threading?
a. Oil is not used during the threading process.
b. The threading machine should be used to tighten fittings onto pipe.
c. Once threading starts, it should continue until five threads extend past the die.
d. A tripod-mounted power threader is controlled with a foot pedal.
d
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Magnetism can only be produced by the earth's core.
Answer the following statement true (T) or false (F)
While having a discussion, Technician A says that a solenoid has contact points, whereas a relay uses a movable iron piston attached to a contact disc. Technician B says that a relay has contact points, whereas a solenoid uses a steel piston moved against a contact disc by magnetism. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B
The combination of genes an individual possesses is:
A. phenotype B. genotype C. diploid D. gametes
In which system does less refrigerant enter the cylinder for each compression cycle, requiring more horsepower for each BTU of cooling?
A) A low-evaporator-temperature system B) A high-condenser-temperature system C) A high-evaporator-temperature system D) A low-condenser-temperature system