550

Series

How is a magnetic blow out coil wired in relation to the circuit its contact controls?

Never

Sealed bearings should be lubricated at what frequency?

115%

The mechanical tripping speed of the governor cannot be lower than what percentage of the car speed?

10%

The setting of the car governor electrical contact on cars 500 ft/min or less must be below what percentage less than the car governor tripping speed?

Leveling

What area of operation is most affected if all brushes in a machine are changed at one time?

Brake cooling

What circuit operates after the brake fully energizes to reduce brake coil current?

Brake not lifting properly, the car is overloaded and excessive motor bearing friction

What could be the cause of an intermittent loop overload trip?

Starting the MG set

What function does a starter panel perform?

Prevents relay from failing to drop due to residual magnetism

What is he purpose of a relay armature residual guard?

40W

What is the maximum soldering iron wattage for use on printed circuit boards?

Tinning

What is the process called that is applying a small amount of solder on the soldering tip to allow maximum heat transfer?

To inter face high and low voltages

What is the purpose of opto-isolators on solid state controllers?

Positive pick up may be lost

What is the result of too large of a relay armature air gap?

Land the counterweight

What must be done before disassembling a machine brake?

Dashpot overload

What relay uses oil or silicon fluid to control the time in which the core and piston rise?

Time-Delay

What type of fuse is used in a circuit where short duration, high currents occur in normal operation?

Selenium

What type of rectifiers lose ability to deliver rated current as they age?

Safey procedures

Which of the following is the most important part of any job in the elevator industry?

Lock and tag out the mainline, have replacement parts available, protect area below

Which of the following should be observed before performing maintenance on a relay logic controller?

To eliminate parallel resistance

Why is it necessary to isolate a component before taking an ohmmeter reading?