The total weight of your elevator (force) is 8100 lbs. and its plunger area is 50 square inches. What is the system pressure?
162 psi
Refer to the NEIEP Moving Walk Final Layout. What is the correct wellway-to-wellway distance?
134′ 11″
Electrolysis is caused by which of the following?
Stray current corrosion and Galvanic corrosion BOTH ARE CORRECT
When using wire rope, the diameter of the sheaves must be how many times the diameter of the suspension ropes?
30
Wye-Delta starting is used for which of the following?
Reduced current starting
You need the area of the plunger to calculate the pressure of the hydraulic system. Your plunger is 8 inches in diameter. What is it’s area?
50.27 square inches
Which of the following provides mechanical interlocking of contactors?
Interlock contacts
As the certified welder on the job you must weld two cylinder pieces. How must you join the two pieces?
Tack welds then a fill bead
Once a plunger joint has been completed, what steps should be followed to prevent damage to the packing?
Sand with emery cloth
Under which of the following conditions will the buzzer (BZT) sound?
When the handrail speed is 15% below step speed.
Refer to the NEIEP Escalator Final Layout diagram. What is the total distance from the first floor finished floor height and the second floor finished floor height?
13′ 6″
Refer to the NEIEP Escalator Final Layout diagram. What is the correct measurement to align the truss in the center of the wellway?
7′ 6 1/2″
What is the function of the lower newel wheel on a moving walk with solid balustrades?
It acts as an idler
Which of the following will determine the leveling speed of an elevator?
Rate of flow in gpm
Which of the following best describes the rack and pinion drive motor brake?
It is spring set and electrically released
Car door switches in LULA elevators are required to operate no more than how many inches from full closed? –
2″
What is the maximum rated capacity of an inclined platform lift?
750 Ibs..
Refer to the NEIEP Moving Walk Straight-Line Diagram. If both inspection switches (INSP sw.) are in the downward position, how will that affect the operation of the walkway?
The walkway would not run.
Refer to Table 2. What is the capacity of a non-fixed 5X 3%” beam that spans 9 feet and weighs 14.75 Ibs. per linear foot?
2000 lbs
Why is it important to only operate line starters with their covers in the proper location?
To prevent flashover between contacts
What is the maximum speed in ft/min. of a residential elevator?.
40 ft/min.
On a vertical platform lift the stop button must be located at what height above the platform floor?
between 48 and 15 inches
Two line starters are required for what type of AC motor control?
Wye-Delta
In order to perform a pressure relief test, which circuits would have to be temporarily bypassed?
The up limit switches
What code do most issues regarding the installation of temporary hoists fall under?
ANSI A10.4
There is a problem with the UP valve and the low oil timer has tripped. What is the expected result?
The car returns to the lowest floor
Which of the following best describes a one person pressure relief valve test?
A single mechanic operates the pump from outside the machine room and records relief pressure.
Rack and Pinion pit structures consist of which of these components?
Foundation, base enclosure, buffer springs
The elevator is running erratically and you want to clean the valve screen. What must you do to ensure that oil doesn’t leak when you remove the screen?
Close the machine room shutoff valve.
If electrolysis erodes the bottom of the hydraulic cylinder, which of the following provides a measure of safety?
Safety bulkhead at the bottom of the cylinder
Safety hooks are best described by which of the following?
Mounted to the frame below the lowest pinion
If a gauge is used to measure system pressure with the elevator at rest and the size of the plunger is known, how can the total weight of the elevator be calculated?
Multiply pressure times area
ASME code permits a scavenger pump or which of the following to collect oil leaked from the gland packing?
5 gallon container
What are the most common types of drive units for stairway chairlifts?
Winding drum and rack & pinion
Approximately how many gallons are required to raise a 9″ plunger 30 feet?
99.1 gallons
Which of the following practices should be followed when initially lifting a load?
Lift the load a few inches, then recheck all rigging.
What must be done to prevent hoist car run away prior to removing the motor assembly from the gear box on counter weighted hoists?
The cage must be tied down
What component of a permanent installation hoist may help prevent over speeding of the car during manual release of the motor brake?
Centrifugal brake
How is the right or left side of a stairway determined?
Standing at the bottom and looking up.
What type of pump system delivers constant volume at all pressures?
Positive displacement gear pump
What best describes the pinion of the governor safety device?
It free wheels until the hoist exceeds tripping speed in the down direction
What is the maximum allowable rated load for a LULA elevator?
1,400 Ibs.
Layout. What is the correct distance to the center of wellway from the column line?
17′ 6 3/4″
The platen plate connects which two hydraulic elevator components together?
Plunger and bolster assembly
Submersible pump units are always designed by which of the following methods?
Direct coupled motor and pump
What is the maximum angle of inclination allowable for a moving walk?
12 degrees
You are performing an acceptance test and must document the working pressure. What must be done to record this pressure?
Run the elevator up with full load
Which of the following is the minimum rated load for both a one- and a two-seat chairlift, respectively?
250lb, 400lb
If a jack or cylinder floats in the jack hole, what step may be needed to overcome this?
Add oil to the cylinder
According to code, what is the highest degree angle stairway onto which a chairlift can be installed?
45
With the elevator at rest, what is the condition of the UP valve?
Open
A flexible oil line was installed to reduce the pump unit vibration felt in the elevator. What is a requirement of this elevator system?
Replace flex line at 6-year intervals
What is the purpose of a stop ring on a hydraulic elevator?
To prevent the plunger from leaving the cylinder
In a situation where a standard pit is provided for a LULA elevator and when no hoistway enclosure is provided at the lower level, how high of an enclosure must be around the pit?
84 inches
Which precaution should you take before entering the step/treadway band of an escalator or moving walk?
Lock out and tag out the mainline disconnect.
Hydro elevators in low rise applications do not need an _ _ room.
overhead machine
Some advantages of hydros are lower equipment and building construction costs because the load of a hydro is carried to the _ where as the load of a traction car is carried by the __.
ground, building structure
When drilling the jack hole, the only proper way to determine if the hole is plumb is to remove the drill stem and bit and use a _ _.
Spider Bob
To plumb the hole, a spider bob is attached to a length of piano wire suspended from as near as possible to the top of the _ or from a fixed point on the drill rig.
Hoistway
When welding a joint, lay _ inch tack welds _ degrees apart, shift it 90 degrees and lay two more 1 inch tack welds 180 degrees apart.
1, 180
On power units having the motor beneath the tank, the pump may be either _ driven or _ coupled.
belt, direct
The purpose of the / is to silence the effect of any pulsations in the pump output and should be as close to the pump as possible.
silencer, muffler
On Bolsters/Bolster Assembly, the plunger is fastened to the _ _ which is then mounted to the center of the Bolster Assembly.
platen plate
With wye-delta, reduced current starting is accomplished without the need for _.
resistors
_ run buttons should run the platform and sling at leveling speeds only.
Temporary
A _ _ consists of a piston held closed by an adjustable spring and must open at a certain pressure to prevent any further increase in pressure.
relief valve
A _ lowering valve allows the car to be lowered at a speed not exceeding 20fpm in case of power failure.
manual
As the oil temperature changes, the _ will change as well and will effect the performance, more specifically, the leveling and approach of the elevator.
viscosity
Be sure wellways are properly _ to avoid accidental injury to you, your team or anyone working outside of our industry.
barricaded
Barricades around the wellway must be _ inches high and be capable of withstanding a _____lb force.
42, 200
A _ protects you if you come in contact with a hot wire or component and then come in contact with ground. It opens the circuit and diverts the supplied current to ground.
GFCI
A _ _ is useful for horizontal (side-to-side) pulling of the truss while being lowered into the wellway.
lever hoist
Code specifies the use of anti-slide devices if the outer edge of the deck is greater than _ inches from the center line of the handrail.
12
(True/False) Anti-slide devices must be less than 3/4″ in height, have no sharp corners or edges and fastened to the deck no closer than 4 inches from the handrail and spaced no greater than 6ft apart.
True
Sometimes referred to as sag switches, _ switches are located within the step band of both upper and lower truss assemblies and function to prevent a step that is sagging by more than __ inch.
step level, 1/8
Per code, an installed escalator can exceed the 30 degree angle of inclination by _ degree.
1
When it comes to moving walks code states that the angle of inclination of the truss from the horizontal shall not exceed _ degrees within ft of the entrance or exits and shall not exceed __ degrees at any point.
3, 3, 12
Belted walkways use a tensioning device at the tail end to maintain the proper tension on the treadway belt and is normally maintained at _ lbs.
3000
(True/False) The speed governor switch on moving walks not driven by an induction motor directly connected to the driving machine (aka AC squirrel cage), will cause power to be removed from the motor and brake if the treadway speed exceeds a predetermined value, not to exceed 20% of maximum designed speed. This device shall be manually resettable.
True
Ensure comb segment teeth are set in the slots of the treadway deep enough so the teeth are always _ the upper surface of the treads.
below
(True/False) LULA’s must provide a permanent mechanical holding device to mechanically stop and hold the car between 35 and 79 inches above the pit floor and must be held 24 inches minimum above the bottom sill.
True
LULA maximum rise is _ ft
25
Residential elevator maximum platform area is _ sq ft
15
Hydraulic overspeed valves will stop a downward traveling car if it exceeds speeds rated between _ and _ percent.
110, 140
Car door switches are required to operate no more than _ inches from full closed.
2
With chairlifts, there needs to be at least _ inches of free passage width remaining on the stairway, per code. If the lift has a seat, it can be measured with the seat in the folded position.
20
The _ _ short radius spiral is a type of short radius spiral.
double 90
The capacity of a chairlift shall not exceed two persons. The rated load shall not be less than _ lbs for a one seat lift and not less than lbs for a two seat lift. The speed shall not exceed __ fpm.
250, 400, 40
(True/False) With platform lifts, codes require a handrail between 1 and 3 inches in diameter, 1 1/2 inches minimum from the wall and 34 to 38 inches above the stair tread nosing.
True
Per code, where the actuation of the safeties is by a governor, the safety shall be set at a maximum speed of _ fpm
75
With platform lifts, the _ is referring to the space occupied by the lifts’ travel whether it is enclosed, partially enclosed or open construction.
Runway
Routine tests and inspections are to be made every _ months for LULA’s in buildings other than private residences and every _ for private residences.
6, year
What is the minimum height of a barricade in place around an open wellway?
42″
What is the maximum angle of inclination for moving walks?
12 degrees
The major advantage of a hydraulic elevator is that it _ building structural support.
requires less
What would be the effect of increasing the size of the oil line if all other elements in a hydraulic elevator system remain the same?
Rate of flow is increased
A _ _ is used to check a jack hole for plumb.
spider bob
What is the operating pressure of a hydraulic elevator with a gross weight of 1500 pounds and a plunger area of 15 square inches?
100 psi
One gallon equals __ cubic inches.
231
Why is it important to follow a welding procedure using a sequence of short welds on opposite sides of the cylinder?
To prevent warping the cylinder
If all other elements in a hydraulic elevator system remain the same, what would be the effect of reducing the diameter of the plunger?
Higher system pressure
How do you prevent rusting of the plunger if the jack unit is installed in the well hole long before the elevator will be completed?
Fill it with oil
(True/False)The pressure relief valve is operated electronically.
False
What prevents the plunger from leaving the cylinder?
The stop ring
The advantage of wye-delta starting is what?
Starting current is lower
A __ cushions pulsations in the oil caused by the pump.
silencer
You can lower a hydraulic elevator without power by using the _ _ __.
manual lowering valve
The _ _ assembly supports the platform of a hydraulic elevator.
bolster channel
It is necessary to run a ground wire to the car sling of a hydraulic elevator to prevent what?
electrical shock
What condition will trip a GFCI?
If a supply lead is shorted to ground
When using a beam clamp, a good rule of thumb is to never load the lower flange to more than __ % of the load which could be handled by the full area of the beam.
50
1 lb equals how many Kg?
.4536
2,000 Kg = __ lbs
4,409
What is the best rigging equipment to use for controlling horizontal movement of the escalator as it is being lifted into position in the wellway?
lever hoist
What is the most common shackle used?
Screw pin bow type
The angle of inclination can _ 30 degrees by a maximum of _ degrees at the installation site.
exceed; 1
The maximum distance between anti-slide devices on an escalator is what?
6′
What happens if a step of an escalator drops more than 1/8″?
The escalator stops automatically
Combplate teeth must be set to ensure the teeth are always _ the _ surface of the treads.
below; upper
What is the maximum allowable gap between the skirt panels on an escalator and the adjacent step tread?
3/16″
Where is the tensioning device located in a belted moving walkway?
Tail end
Moving walk overspeed switches must switch at no more than __% the rated speed.
20
What is the maximum rise of a LULA?
25′
At what percentage of the rated speed must the overspeed valve of a hydraulic LULA stop the car?
110%-140%
LULA car door switches are required to operate at no more than __ inches from full closed.
2
A non-removable means must be provided to prevent a LULA’s car downward movement at a height of to ___ inches above the pit floor.
35; 79
The maximum platform area for a residential elevator is __ sq. ft..
15
What is the least amount of free passage width required on the stairway for a chairlift?
20″
The speed as measured along the incline of a chairlift shall not exceed __.
40 ft/min
The handrail height for a residential platform lift must be between _ to _ inches above the stair tread nosing.
34; 38
For a residential platform lift the governor shall set at a maximum speed of __.
75 fpm
What we would normally refer to as a hoistway or hatchway in elevator terms is called a __ when discussing platform lifts.
runway
Routine periodic tests and inspections are to be made at intervals no longer than _ for LULA’s in buildings other than private residences and no longer than _ for private residences.
6 months; 1 year
ANSI A10.4 may be used for a Rack and Pinion installation when it is used as a what?
Personnel lift during construction
(True/False) The frame of a Rack and Pinion elevator is similar to a traditional elevator car sling.
True
Spacing of tower wall ties generally fall between _ to _ feet.
10; 30
The typical maximum speed for R&P hoists is __.
300 fpm
Rack sections for Rack and Pinion hoists are aligned by doing what?
Placing roll pins in the ends
Changes in the viscosity of the oil in a hydraulic elevator will mainly effect the _ and _ of the elevator.
leveling; approach
If a hydraulic elevator trips its low oil timer what should you check if the oil level is good?
pump belts
Submersible pumps are always _ _ , conventional pumps are usually belt driven.
direct coupled
The car must run at __ speed only when using temporary run buttons.
leveling
A __ can be caused if the casing is welded crooked or drilling of the hole goes off center.
dogleg
In a hydraulic system pressure=
Force/area
In a hydraulic system area=
Force/pressure