Elevator Mechanics Review/165
Questions and
Answers/Verified/A+ Rated
Car running up keep stopping why? - -Contact is not deenergizing in
push button
-Third-floor bulbs burn out why? - -Shorted resistor
-Car will not travel to second floor without a third-floor me a call and
will not go down from three without a second-floor hall, what's the
problem? - -2Fl 4/6
-Why won't motor start? - -MOL1 95/96
-Car doors closed and won't run what do you check? - -Check for
voltage at four and five
Bad Transistor
-Top barricade can be replaced with? - -1/4" Cable
-There is voltage at the switch but none at point a what's wrong? - -
Either R1 or R2 open
-The door close limit switch is not working do you have power from 35
to term eight. No power from 1 to 52 why? - -Door limit switch
malfunction
-Car running normally but the buzzer will not shut off why? - -EHP 2/3
shorted
-Relay STR has voltage. TRU has voltage, RU has no voltage, why? - -
TRU 9/8
-Second floor PI illuminates then quickly extinguishes why? - -X1 4/6
-On a machine, what is drilled out first? - -Secondary sheave
-Dumb waiter takes off before loading why? - -Non interference
-Car levels in 3 inches high in down direction why? - -Counterweight
-In bi-parting doors what gap is allowed before gate switch is open? - -
3/4"
-Pressure switch is wired in what direction - -Down directional
, -What is the tripping speed of counterweight governor? - -No more than
10% higher
-There is excessive sparking on generator why? - -High Micha
-How does interpoles affect the Armature? - -Reaction
-What is the maximum door closing force? - -30 lbs and 7 lbs kinetic
-What do you do before replacing a relay on a controller? - -LOTO, Test,
and Verify
-When are spring buffers used? - -Less than 200fpm
-What are SCR's good for? - -They are quieter and make less vibration
then motor generator set
-You have a 200 ohm resistor at 200 Watts what do you replace it with?
- -75 ohm 200 watt adjustable resistor
-Pump overload keeps tripping. How do you measure amperage? - -
Clamp on meter separately each wire
-Customer complains about a third floor PI bulb burned out, why? - -
Shorted resistor
-There are three elevators, 12 floors, customer does not want PI's on
second, seventh, and eighth floor. How many total PI 's? - -27 PI's
-10k ohm resistor with 500mF. How long will it take to charge
capacitor? - -5 sec
-What do you do before running a Hydro after car is built? - -Check
piston for debris and make sure head is tight
-How to tell which side is right or left hand doors? - -Inside looking out
-If you get a complaint that all floors make noise, what should you
check? - -Car doors
-What is the issue if you add power to a generator but the motor
doesn't gain any more speed? - -Generator is saturated
-If a handrail switch is tripped and you reset it but the escalator
immediately turns back on, what's the problem? - -Start switch is stuck
in the on position
-How many Crosbys do you use on half inch rope - -3
-What do U grooves need? - -Double wrap
Questions and
Answers/Verified/A+ Rated
Car running up keep stopping why? - -Contact is not deenergizing in
push button
-Third-floor bulbs burn out why? - -Shorted resistor
-Car will not travel to second floor without a third-floor me a call and
will not go down from three without a second-floor hall, what's the
problem? - -2Fl 4/6
-Why won't motor start? - -MOL1 95/96
-Car doors closed and won't run what do you check? - -Check for
voltage at four and five
Bad Transistor
-Top barricade can be replaced with? - -1/4" Cable
-There is voltage at the switch but none at point a what's wrong? - -
Either R1 or R2 open
-The door close limit switch is not working do you have power from 35
to term eight. No power from 1 to 52 why? - -Door limit switch
malfunction
-Car running normally but the buzzer will not shut off why? - -EHP 2/3
shorted
-Relay STR has voltage. TRU has voltage, RU has no voltage, why? - -
TRU 9/8
-Second floor PI illuminates then quickly extinguishes why? - -X1 4/6
-On a machine, what is drilled out first? - -Secondary sheave
-Dumb waiter takes off before loading why? - -Non interference
-Car levels in 3 inches high in down direction why? - -Counterweight
-In bi-parting doors what gap is allowed before gate switch is open? - -
3/4"
-Pressure switch is wired in what direction - -Down directional
, -What is the tripping speed of counterweight governor? - -No more than
10% higher
-There is excessive sparking on generator why? - -High Micha
-How does interpoles affect the Armature? - -Reaction
-What is the maximum door closing force? - -30 lbs and 7 lbs kinetic
-What do you do before replacing a relay on a controller? - -LOTO, Test,
and Verify
-When are spring buffers used? - -Less than 200fpm
-What are SCR's good for? - -They are quieter and make less vibration
then motor generator set
-You have a 200 ohm resistor at 200 Watts what do you replace it with?
- -75 ohm 200 watt adjustable resistor
-Pump overload keeps tripping. How do you measure amperage? - -
Clamp on meter separately each wire
-Customer complains about a third floor PI bulb burned out, why? - -
Shorted resistor
-There are three elevators, 12 floors, customer does not want PI's on
second, seventh, and eighth floor. How many total PI 's? - -27 PI's
-10k ohm resistor with 500mF. How long will it take to charge
capacitor? - -5 sec
-What do you do before running a Hydro after car is built? - -Check
piston for debris and make sure head is tight
-How to tell which side is right or left hand doors? - -Inside looking out
-If you get a complaint that all floors make noise, what should you
check? - -Car doors
-What is the issue if you add power to a generator but the motor
doesn't gain any more speed? - -Generator is saturated
-If a handrail switch is tripped and you reset it but the escalator
immediately turns back on, what's the problem? - -Start switch is stuck
in the on position
-How many Crosbys do you use on half inch rope - -3
-What do U grooves need? - -Double wrap
