Technician A says that the HVAC doors in an automatic system may be vacuum operated. Technician B says that the HVAC doors in an automatic system may be operated by electric servos. Which technician is correct?
A) Technician A only B) Technician B only
C) Both technicians A and B D) Neither technician A nor B
C
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The ____________________ is gaining popularity because it can be adapted easily to most any compressor.
Fill in the blank(s) with the appropriate word(s).
A bolt that is threaded into a casting is often called a ________
A) Cap screw B) Stud C) Block bolt D) Crest bolt
PVC pipe is rated at 62% of strength at 100 degrees F compared to its strength at 73.6 degrees. What water pressure may be used at 100 degrees for Schedule 80 pipe?
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. Most static phase converters consist primarily of capacitors. 2. Rotary phase converters are capable of supplying one or more loads. 3. A single set of fuses will serve as both branch-circuit short-circuit and ground-fault protection, as well as overload protection for the motor. 4. A totally enclosed motor frame is guaranteed to keep out moisture. 5. The rotor of an induction motor will always turn at a speed slightly faster than the stator magnetic field.