Elevator Mechanic Review Questions And
Answers 2025
, Energizing a relay coil contacts that were normally open and contacts
that were normally closed - Answer closes , opens
Making contacts are - Answer Normally open contacts
Breaking contacts are - Answer normally closed contacts
What happens to wire connections when you have AC Relay chatter - Answer AC relay chatter
causes contacts to crystalize and break
A better DC power supply system that eliminates the dip to zero current at anytime - Answer 3
phase full wave rectifier system
A contact on a relay that shorts out the circuit which energized the relay is called - Answer a self
holding contact
why do power companies generate AC instead of DC - Answer it is cheaper to manufacture and it
takes less wires (cables) to distribute
the secondary voltage is higher then the primary voltage. - Answer step
up transformer
on a hydro, can your 110v come from the controller - Answer no, the 110v for the light and fan etc
must come from a separate source
how do you plumb a hydraulic jack - Answer use a spider bob
how do you straighten a bent hydro jack - Answer apply heat with an acetlyne tourch on the high
side
how to dress a hydro cylinder joint - Answer dress with fine emery cloth in an up and down motion
a hydraulic leak proof joint can be made when the threads are cut - Answer
sharp and clean
what is the purpose of a hydro silencer or dampener (muffler) - Answer to absorb or dampen
pulsations in the oil and minimize noise going into the hoistway
why are sills grouted - Answer to support the load
when are strainbars and boxes installed - Answer every 100 feet down from the top of the
hoistway
what is the purpose of hardware cloth - Answer to protect the travelers during normal operation
Answers 2025
, Energizing a relay coil contacts that were normally open and contacts
that were normally closed - Answer closes , opens
Making contacts are - Answer Normally open contacts
Breaking contacts are - Answer normally closed contacts
What happens to wire connections when you have AC Relay chatter - Answer AC relay chatter
causes contacts to crystalize and break
A better DC power supply system that eliminates the dip to zero current at anytime - Answer 3
phase full wave rectifier system
A contact on a relay that shorts out the circuit which energized the relay is called - Answer a self
holding contact
why do power companies generate AC instead of DC - Answer it is cheaper to manufacture and it
takes less wires (cables) to distribute
the secondary voltage is higher then the primary voltage. - Answer step
up transformer
on a hydro, can your 110v come from the controller - Answer no, the 110v for the light and fan etc
must come from a separate source
how do you plumb a hydraulic jack - Answer use a spider bob
how do you straighten a bent hydro jack - Answer apply heat with an acetlyne tourch on the high
side
how to dress a hydro cylinder joint - Answer dress with fine emery cloth in an up and down motion
a hydraulic leak proof joint can be made when the threads are cut - Answer
sharp and clean
what is the purpose of a hydro silencer or dampener (muffler) - Answer to absorb or dampen
pulsations in the oil and minimize noise going into the hoistway
why are sills grouted - Answer to support the load
when are strainbars and boxes installed - Answer every 100 feet down from the top of the
hoistway
what is the purpose of hardware cloth - Answer to protect the travelers during normal operation
