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Which of the following would be used to troubleshoot a controller problem? - ANS
Straight-line wiring diagram
In the single automatic push button system (SAPB) how many calls can be registered at one time? -
ANS One call at a time
What type of elevator control passes up hall calls in the down direction and down hall calls in the up
direction? - ANS Selective collective control
What does the following symbol represent? - ANS Poly/Three-phase rectifier
What do the following symbols represent? - ANS N.C. mechanically operated switch
Which of the following statements is correct when connecting a meter in a circuit to measure current?
- ANS The meter will be damaged if connected across a voltage source
, When using the digital multimeter, what jack is the red lead plugged into for all measurements except
current? - ANS Volts/ohm jack
What is the function SW position used to measure DC voltage on a digital meter? - ANS V
with 3 dots and a line on top
What is the primary reason AC relays hum or chatter? - ANS AC cycle reversal
Which of the following best describes the contact rating of a magnetic switch? - ANS The
maximum voltage and current that can be safely interrupted
How can you reduce contact arcing on plug-in relay contacts? - ANS Wire two contacts of
the same relay in series
How are latching relays reset? - ANS Electrically