Mechanics Exam
* 1 gallon is how many cubic inches? - ANS-231
* A Force of 5000 lbs is applied to a plunger with an area of 25 sq inches. What is the system
pressure? - ANS-200 psi. (5000 lbs/ 25 sq inches = 200 psi
* A motor needs a sleeve bearing replaced. ANS-Friction Bearing (420) is the kind of bearing
you'll need. * ADA height for a new Hall Fixture? - ANS-42" to center of fixture
* How do you handle a coworker who shows up to work intoxicated? - ANS-Speak to the MIC,
Union BA or call your Supervisor.
* If changes need to be made during construction, who do you inform? - ANS-Mechanic In
Charge
* If there is high screeching, what should you check? - ANS-SCR drive motor bushing
* In Bi-Parting doors, what gap is allowed before Gate switch is opened? - ANS-3/4" Max
* In what section of the NEC is Elevator, Escalator, Dumbwaiter and Moving Walks found? -
ANS-620
* On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake.
The problem circuit is the ANS-Suicide circuit (425). * SCRs are good for what? - ANS-They are
quieter and cause less vibration than an MG Set.
* Time constant question on test? - ANS-45 seconds
* What amount of Crosby's do you use on 1/2" rope? - ANS-3
* What are the most common features of Load Weigh? - ANS-To control the Generator field and
express operation.
* What do U grooves need? - ANS-Double Wrap
* What do you hold a machine beam down with? - ANS-Tie downs
* What is going on if you add power to a generator but motor doesn't gain more speed? -
ANS-Generator is Saturated.
* What is Relief set at? - ANS-150%
* What is required on the Cartop by ASME? - ANS-Inspection Station, Light, Duplex receptacle.
* What is the conversion formula when measuring Inch to MM? - ANS-25.4 Inch to MM (.03937)
2.54 Inch to CM (.3937)
* What is the conversion from Kilograms to Lbs? - ANS-1 Kilogram = 2.2 lbs
* What is the Max clearance between Door and Sill? - ANS-3/8". (1/4" - 3/8")
* What is the Max distance between Raceway supports? - ANS-15'
* What is the Max distance from Strain Bars? - ANS-100'
* What is the Max length Motor- Generator leads can be to the controller without a raceway? -
ANS-6'
* What is the minimum gap Sill - Sill? - ANS-1/2"
* What is the Overlap minimum on 2 and 3 speed doors? - ANS-5/8"
* What is the Silent Killer? - ANS-Counter weights
* What is the smallest wire allowed in a Traveling cable? - ANS-# 20 Gauge
* What is the strongest type of rope ? - ANS-Seale rope
, * What's the Max over speed on a Moving Walk? - ANS-20%
* When are comp ropes (instead of comp chains) required? - ANS-700 FPM
* When are Oil Buffers required? - ANS-Above 200FPM
* When cutting Laminated Panels, which direction should the finished side face? -
ANS-Finished Face of the material should face the cutting edge of the tool. (255). The blade
has a tendency to burr the backside.
* Where is the Tension Sheave in a Moving Walk? - ANS-Tail end
* You have an old DC motor and you are adding an SCR Drive. What do you do with the
Interpoles? - ANS-Leave the Interpoles alone. (When adding an SCR Drive to the generator,
the Series Loop is removed, as are the three resistors.
** "Vertical" platform stopping devices? - ANS-2 Switches. 15lb Max pressure.
** 2nd floor PI turns on then quickly extinguishes, why? - ANS-X1 4/6
** 3rd floor bulb burned out question on test? - ANS-Shorted resistor
** A "Vertical" platform lift has a clearance of 1". How much will it need to be moved to meet
code? - ANS-Deduct 1/4".
The required width is 3/4". ** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor
to replace it. What can you use to make up the resistor? - ANS-2 600 Ohms resistors in
Parallel. "The resistance is half of the highest rating in a parallel circuit.
3, 225 Ohm resistors in parallel equal 75 Ohms.
** A 480 VAC Step Down Transformer is connected to a 3 phase rectifier. What will the output
be? - ANS-320 VDC
480 - 33.33% = 320
** A car traveling in the hoistway always stops at the same point and blows a fuse. What is the
problem? - ANS-Traveling cable has a cut or short
** A car weighs 2500 lbs with a capacity of 2500 lbs. The CWT is weighed at 40%. How much
is the motor lifting at 100% load? - ANS-1500 lbs
2500 x .40 = 1000 lbs
2500 + 1000 = 3500 lbs
5000 - 3500 = 1500 lbs
** A car with a "Selective Collective" controller is moving to the lobby to pick up a call. An up
call is put in at the second floor. What happens? - ANS-Call is bypassed till the car is moving in
the up direction.
** A contractor wants to raise the car speed from 100 FPM to 125 FPM. It currently has a 12"
sheave. What size sheave is required? - ANS-15"
(125 /100 = 1.25 1.25 x 12 = 15)
** A client does not wish to have an Escape Hatch installed on his residential elevator. Under
what conditions is this legal? - ANS-Manual Operation must be provided (850)
** A Hydro runs up with no load but does not run up with a full load. What is the issue? -
ANS-The relief valve is set too low (805)
** A Hydro top call is placed and call returns to the bottom floor without making it up. What's
wrong? - ANS-Low oil timer
** An MOV burns out, you replace it but cannot read voltage or resistance. What should you
do? - ANS-Replace it with a larger one (630)
* 1 gallon is how many cubic inches? - ANS-231
* A Force of 5000 lbs is applied to a plunger with an area of 25 sq inches. What is the system
pressure? - ANS-200 psi. (5000 lbs/ 25 sq inches = 200 psi
* A motor needs a sleeve bearing replaced. ANS-Friction Bearing (420) is the kind of bearing
you'll need. * ADA height for a new Hall Fixture? - ANS-42" to center of fixture
* How do you handle a coworker who shows up to work intoxicated? - ANS-Speak to the MIC,
Union BA or call your Supervisor.
* If changes need to be made during construction, who do you inform? - ANS-Mechanic In
Charge
* If there is high screeching, what should you check? - ANS-SCR drive motor bushing
* In Bi-Parting doors, what gap is allowed before Gate switch is opened? - ANS-3/4" Max
* In what section of the NEC is Elevator, Escalator, Dumbwaiter and Moving Walks found? -
ANS-620
* On a Ward-Leonard circuit, the brake is set but the motor is trying to slip through the brake.
The problem circuit is the ANS-Suicide circuit (425). * SCRs are good for what? - ANS-They are
quieter and cause less vibration than an MG Set.
* Time constant question on test? - ANS-45 seconds
* What amount of Crosby's do you use on 1/2" rope? - ANS-3
* What are the most common features of Load Weigh? - ANS-To control the Generator field and
express operation.
* What do U grooves need? - ANS-Double Wrap
* What do you hold a machine beam down with? - ANS-Tie downs
* What is going on if you add power to a generator but motor doesn't gain more speed? -
ANS-Generator is Saturated.
* What is Relief set at? - ANS-150%
* What is required on the Cartop by ASME? - ANS-Inspection Station, Light, Duplex receptacle.
* What is the conversion formula when measuring Inch to MM? - ANS-25.4 Inch to MM (.03937)
2.54 Inch to CM (.3937)
* What is the conversion from Kilograms to Lbs? - ANS-1 Kilogram = 2.2 lbs
* What is the Max clearance between Door and Sill? - ANS-3/8". (1/4" - 3/8")
* What is the Max distance between Raceway supports? - ANS-15'
* What is the Max distance from Strain Bars? - ANS-100'
* What is the Max length Motor- Generator leads can be to the controller without a raceway? -
ANS-6'
* What is the minimum gap Sill - Sill? - ANS-1/2"
* What is the Overlap minimum on 2 and 3 speed doors? - ANS-5/8"
* What is the Silent Killer? - ANS-Counter weights
* What is the smallest wire allowed in a Traveling cable? - ANS-# 20 Gauge
* What is the strongest type of rope ? - ANS-Seale rope
, * What's the Max over speed on a Moving Walk? - ANS-20%
* When are comp ropes (instead of comp chains) required? - ANS-700 FPM
* When are Oil Buffers required? - ANS-Above 200FPM
* When cutting Laminated Panels, which direction should the finished side face? -
ANS-Finished Face of the material should face the cutting edge of the tool. (255). The blade
has a tendency to burr the backside.
* Where is the Tension Sheave in a Moving Walk? - ANS-Tail end
* You have an old DC motor and you are adding an SCR Drive. What do you do with the
Interpoles? - ANS-Leave the Interpoles alone. (When adding an SCR Drive to the generator,
the Series Loop is removed, as are the three resistors.
** "Vertical" platform stopping devices? - ANS-2 Switches. 15lb Max pressure.
** 2nd floor PI turns on then quickly extinguishes, why? - ANS-X1 4/6
** 3rd floor bulb burned out question on test? - ANS-Shorted resistor
** A "Vertical" platform lift has a clearance of 1". How much will it need to be moved to meet
code? - ANS-Deduct 1/4".
The required width is 3/4". ** A 300 Ohm resistor burns out. You don't have a 300 Ohm resistor
to replace it. What can you use to make up the resistor? - ANS-2 600 Ohms resistors in
Parallel. "The resistance is half of the highest rating in a parallel circuit.
3, 225 Ohm resistors in parallel equal 75 Ohms.
** A 480 VAC Step Down Transformer is connected to a 3 phase rectifier. What will the output
be? - ANS-320 VDC
480 - 33.33% = 320
** A car traveling in the hoistway always stops at the same point and blows a fuse. What is the
problem? - ANS-Traveling cable has a cut or short
** A car weighs 2500 lbs with a capacity of 2500 lbs. The CWT is weighed at 40%. How much
is the motor lifting at 100% load? - ANS-1500 lbs
2500 x .40 = 1000 lbs
2500 + 1000 = 3500 lbs
5000 - 3500 = 1500 lbs
** A car with a "Selective Collective" controller is moving to the lobby to pick up a call. An up
call is put in at the second floor. What happens? - ANS-Call is bypassed till the car is moving in
the up direction.
** A contractor wants to raise the car speed from 100 FPM to 125 FPM. It currently has a 12"
sheave. What size sheave is required? - ANS-15"
(125 /100 = 1.25 1.25 x 12 = 15)
** A client does not wish to have an Escape Hatch installed on his residential elevator. Under
what conditions is this legal? - ANS-Manual Operation must be provided (850)
** A Hydro runs up with no load but does not run up with a full load. What is the issue? -
ANS-The relief valve is set too low (805)
** A Hydro top call is placed and call returns to the bottom floor without making it up. What's
wrong? - ANS-Low oil timer
** An MOV burns out, you replace it but cannot read voltage or resistance. What should you
do? - ANS-Replace it with a larger one (630)
