QUESTIONS WITH ANSWERS GRADED A+
◉ Which phase angle is generated by a three phase motor? Answer: 120
◉ The coil of a current magnetic relay is wired? Answer: In series with
the run winding.
◉ Limit switches are usually found on which type of systems? Answer:
Heating
◉ Sensing bulb on thermostats are filled with which type of liquid?
Answer: volatile liquid
◉ Which type of sensors do electronic thermostats use? Answer:
thermistors
◉ Which voltage do line voltage thermostats usually control? Answer:
115 and 220
◉ Low voltage thermostats usually control which type of voltage?
Answer: 24