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CET Study Cards > Course 3: Unit 11 > Flashcards

Course 3: Unit 11 Flashcards

Maintenance of Escalators and moving walkways

1
Q

Which of the following is commonly carried by the elevator technician performing maintenance on escalator and moving walks?

a. Lubricant for escalator skirts
b. WD-40 or similar lubricant
c. Pipe wrench
d. Threading tools (taps and dies)

A

a. Lubricant for escalator skirts

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2
Q

The elevator technician is not normally responsible for maintaining the:

a. Escalator comb plates
b. Ambient lighting over the escalator or moving walkway
c. Demarcation lights
d. Handrail and drives

A

b. Ambient lighting over the escalator or moving walkway

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3
Q

The information on the date of installation and date of alteration as well as required updates for escalators and moving walks can be found on the:

a. Balustrade near the start switch
b. The building as-built drawings
c. The code data plate located on the disconnect or controller and vicinity of starting switch
b. The top of the newel on the right side

A

c. The code data plate located on the disconnect or the controller and vicinity of starting switch

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4
Q

Before performing maintenance on an escalator:

a. Only the entrance end must be posted “Out of Service” and have barricades/barriers placed blocking access
b. Both ends must be posted “Out of Service” and have barricades/ barriers placed blocking access
c. The entrance end must be posted “Out of Service” only
d. Both ends must be posted “Out of Service” and have barricades/barriers placed blocking access only if the nature of the maintenance requires it

A

b. Both ends must be posted “Out of Service” and have barricades/ barriers placed blocking access

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5
Q

When it is necessary to ride on an escalator with a step removed:

a. Always ride in front of the opening and hold both handrails
b. This is never necessary
c. Always ride behind the opening and hold both handrails
d. Have a helper ride it

A

c. Always ride behind the opening and hold both handrails

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6
Q

If ___% of escalator steps are removed, a mechanical dog must be engaged. If not equipped with a mechanical dog, the drive chain shall be secured to the truss braces to prevent movement

a. 50
b. 35
c. 15
d. 10

A

d. 10

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7
Q

The two factors that contribute to entrapment between the escalator step and skirt are:

a. The speed of the escalator and the height of the step.
b. The width of the step and total run of the unit
c. The gap between the step and skirt and the friction of the skirt
d. The friction of the step and the gap between steps.

A

c. The gap between the step and skirt and the friction of the skirt

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8
Q

The requirement for the combplate impact device was first introduced in ASME A17.1 in the ________ edition

a. 1991a
b. 1994
c. 1990
d. 1992b

A

d. 1992b

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9
Q

When operating an escalator or moving walk for maintenance purposes:

a. The holding or maintaining circuit shall be opened so that constant pressure on the key start switch is required for the unit to operate
b. A person must be positioned at a stop switch to operate when signaled
c. The key start switch must be jumped so it can be operated from the controller
d. The inspect switch must be placed in the run position

A

a. The holding or maintaining circuit shall be opened so that constant pressure on the key start switch is required for the unit to operate

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10
Q

When walking on a partially disassembled unit:

a. Always step on the step axles from axle to axle while holding the handrail
b. Avoid walking on the step axles as much as possible
c. Never step on a step axle
d. Always leave every third step or pallet in place to provide for walking

A

b. Avoid walking on the step axles as much as possible

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11
Q

The rated speed of an escalator is:

a. Measured along the centerline of the steps in the up direction of travel, with rated load in the steps
b. Measured along the centerline of the steps in the down direction of travel, with rated load in the steps
c. Measure along the centerline of the steps in the up direction of travel, with no load in the steps
d. Measure along the centerline of the steps in the down direction of travel, with no load in the steps

A

a. Measured along the centerline of the steps in the up direction of travel, with rated load in the steps

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12
Q

Name the parts of an escalator: Unfortunately I can’t add pictures But the test will ask you to name a part of the escalator on said picture.

A

Skip

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13
Q

When a safety device on an escalator or moving walk requires manual reset:

a. It is necessary to get access to the device to reset it.
b. It can only be reset by on-site intervention by elevator personnel by a means not available to the general public or authorized personnel.
c. It can only be reset by personal intervention by a means not accessible to the general public prior to restarting the escalator or moving walk
d. It can only be restarted by an authorized person by a means not accessible to the general public

A

b. It can only be reset by on-site intervention by elevator personnel by a means not available to the general public or authorized personnel.

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14
Q

The escalator skirt is defined as:

a. The panel on the exterior of high or low deck units where they contact the floor
b. The panels on the upper part or the balustrade adjacent to the handrails
c. The panels immediately adjacent to the stationary part of the combplate
d. The panels located immediately adjacent to the steps or treadway

A

d. The panels located immediately adjacent to the steps or treadway

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15
Q

When escalators or moving walks are in tandem operation they are:

a. Connected in series with a common intermediate landing
b. Connected parallel both running the same direction
c. Connected side by side in parallel with one running up and the other running down
d. connected in series with both feeding the common landing

A

a. Connected in series with a common intermediate landing

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16
Q

When performing maintenance on escalators and moving walks, the following senses are used:

a. Hearing, smelling, feeling, tasting
b. Hearing, smelling, feeling, seeing
c. Only feeling and hearing
d. Only seeing and hearing

A

b. Hearing, smelling, feeling, seeing

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17
Q

When riding the escalator and/or moving walk during maintenance at least ____ trips are required.

a. two
b. three
c. one
d. four

A

a. two

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18
Q

The escalator and moving walk handrail speed must be:

a. Slightly slower than the steps or pallets.
b. Slightly faster then the steps or pallets.
c. At least 10 ft/min faster than the steps or pallets.
d. Approximately the same as the steps and pallets.

A

d. Approximately the same as the steps and pallets.

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19
Q

The caution signs shown in ASME A17.1/CSA B44 Figure 6.1.6.9 indicates that:

a. Wheeled vehicles can be taken on an escalator.
b. Wheeled vehicles cannot be taken on an escalator.
c. Light baby cariages are okay on an escalator if the baby is removed.
d. Wheeled luggage can be rolled on an escalator.

A

b. Wheeled vehicles cannot be taken on an escalator

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20
Q

Demarcation lights where required are located:

a. Under the step at the upper landing only.
b. over the steps are the bottom landing only.
c. Either over or under the steps at both landings.
d. Under the steps at both landings not more than 16 in. from the complate.

A

d. Under the steps at both landings not more than 16 in. from the complate.

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21
Q

The skirt obstruction devices (skirt switches) are required to stop the escalator if:

a. The skirt panel is kicked near the landing.
b. The skirt panel is subjected to a 25 lbf horizontal force.
c. There is a force between the step and skirt panel.
d. An object is caught between the step and the skirt as the step approaches the combplate.

A

d. An object is caught between the step and the skirt as the step approaches the combplate.

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22
Q

The step tread must mesh with the:

a. Combplate at least 50% of the time.
b. Combplate at least 80% of the time.
c. Balustrades at the lower end.
d. Combplate all the time.

A

d. Combplate all the time.

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23
Q

An escalator was installed under ASME A17.1-1990. ASME A17.1/CSA B44, the maximum clearance between the step and skirt panel is:

a. 3/16 in. (5mm) on each side.
b. 1/4 in. (6mm) on each side.
c. 3/16 in. (5mm) with a maximum of 1/4 in. (6mm) total for both sides
d. 3/8 in. (10mm) on each side.

A

a. 3/16 in. (5mm) on each side.

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24
Q

The safety code for existing elevators and escalators ASME A17.3 allows a maximum of ___ in. clearance between the step and skirt panel.

a. 3/8 (10mm)
b. 1/4 (6mm)
c. 3/16 (5mm)
d. 5/32 (4mm)

A

a. 3/8 (10mm)

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25
Q

ASME A17.1/CSA B44 requires:

a. Both new and existing escalators are subject to the step/skirt performance index testing.
b. Only new escalators are subject to the step/skirt performance index testing.
c. Both new and existing escalators and moving walks are subject to the step/skirt performance index texting.
d. Only new escalators and moving walks are subject to the step/skirt performance index.

A

a. Both new and existing escalators are subject to the step/skirt performance index testing.

26
Q

The minimum step/skirt performance index for an escalator (without skirt deflectors) installed under ASME A17.1a-2002/CSA B44-02a is:

a. 0.15.
b. 1.5.
c. 15.
d. None of the above.

A

d. None of the above.

27
Q

If a combplate section has one missing tooth:

a. A sign should be posted warning to watch children carefully.
b. The combplate section must be replaced.
c. The combplate may be relocated to the side and continued in use.
d. There is no need to replace it since only one missing tooth is okay

A

b. The combplate section must be replaced.

28
Q

For escalators with smooth risers, the maximum allowable clearance between the steps is:

a. 3/32 in. (2.5mm)
b. 5/64 in. (5mm)
c. 1/16 in. (1.6mm)
d. 5/32 in. (4mm)

A

d. 5/32 in. (4mm)

29
Q

Where escalator skirt panels require treatment with a friction reducing material, it is best to treat them by:

a. Spraying using an aerosol can.
b. Applying the material using a soft cloth or lamb’s wool.
c. Using a solid stick of material, holding it against the skirt panel while operating.
d. Using a garden type sprayer to apply the lubricant.

A

b. Applying the material using a soft cloth or lamb’s wool.

30
Q

Repair of the following items is usually not done by the elevator technician:

a. Demarcation lights.
b. Handrail guards.
c. Handrails.
d. Overhead lighting.

A

d. Overhead lighting.

31
Q

Check the following escalator or moving walk safety devices that required manual reset.

a. Step up thrust device
b. Skirt obstruction devices
c. Broken drive chain device
d. Broken step chain device
e. Rolling shutter device
f. Stopped handrail device
g. Handrail speed monitoring device
h. Tandem operation
i. Handrail entry device
j. Broken step chain device

A

c. Broken drive chain device
d. Broken step chain device
g. Handrail speed monitoring device
i. Handrail entry device
j. Broken step chain device

32
Q

If ___% of escalator steps are removed, in addition to electrical lockout and tagout, the step chain must be secured to prevent movement in either direction (either by a mechanical dog or other means).

a. 50
b. 25
c. 75
d. 10

A

b. 25

33
Q

An escalator brake has a data plate that specifies that the dynamic torque should be between 200 and 300 ft-lb. The torque is measured by placing a torque wrench on the designated place:

a. And reading the torque to start movement
b. And reading the torque to start movement in both the up and down direction.
c. And reading the torque to start movement in the down direction only.
d. Measuring the torque required to maintain movement at a steady speed.

A

d. Measuring the torque required to maintain movement at a steady speed.

34
Q

The best method of lubricating a step chain is:

a. Smear #2 grease on the sprocket teeth about once per month.
b. Spray the chain with WD-40 monthly.
c. Spray the chain with 20w motor oil using a garden sprayer.
d. Use a brush type automatic lubricator with the oil recommended by the manufacturer.

A

d. Use a brush type automatic lubricator with the oil recommended by the manufacturer.

35
Q

When walking on a partially assembled unit, the step/pallet axles should be:

a. Used as steps.
b. Avoided as much as possible.
c. Removed.
d. Avoided at all cost.

A

b. Avoided as much as possible.

36
Q

The step/pallet level device should be set so it will detect a downward displacement of either side of the step or pallet of ___.

a. 6 mm (0.250 in.)
b. 10 mm (0.375 in.)
c. 3 mm (0.125 in.)
d. 13 mm (0.500 in.)

A

c. 3 mm (0.125 in.)

37
Q

The A17.1 Code requires that escalators’ interior be:

a. cleaned annually
b. Cleaned semi-annually
c. Cleaned as often as needed but inspected at least annually to determine the need for cleaning
d. Steam cleaned monthly

A

c. Cleaned as often as needed but inspected at least annually to determine the need for cleaning

38
Q

The step or pallet wheels:

a. Require lubrication monthly
b. Require lubrication semi-annually
c. Are lubricated by spraying chain oil on the rollers.
d. Have sealed bearings and do not require lubrication.

A

d. Have sealed bearings and do not require lubrication.

39
Q

The purpose of the “Novatex” board is to:

a. Take the load from the step roller and track at both curves (upper and lower).
b. Increase the track load and reduce the step chain load.
c. Reduce the load on the escalator drive chain.
d. Transfer the load to the drive machine.

A

a. Take the load from the step roller and track at both curves (upper and lower).

40
Q

If one side of a disk brake has lining that is worn beyond the minimum limit:

a. Both linings must be replaced.
b. Only that lining needs to be replaced.
c. The brake must be replaced.
d. No replacement is needed since the other lining is okay.

A

a. Both linings must be replaced.

41
Q

The escalator brake must limit the deceleration to 3 ft/sec².
a. For an up running escalator.
b. For a down running escalator.
c. For both up and down running escalator.
d. For an escalator with rated speed over 100 ft/min

A

b. For a down running escalator.

42
Q

For an escalator installed under ASME A17.1b-1992, the combplate impact device must operate when:

a. A horizontal force in the center of 225 lbf (1000 N) is applied and also when a vertical force up of 150 lbf (670 N) is applied.
b. Only a horizontal force in the center of 225 lbf (1000 N)
c. A horizontal force in the center of 450 lbf (2000 N) is applied and also when a vertical force up of 150 lbf (670 N) is applied.
d. Only a vertical force of 225 lbf (1000 N).

A

a. A horizontal force in the center of 225 lbf (1000 N) is applied and also when a vertical force up of 150 lbf (670 N) is applied.

43
Q

The wearing surfaces on handrails are usually lubricated with:

a. Paraffin (wax) or silicone.
b. #6 grease.
c. Lubriplate excell.
d. Gear oil.

A

a. Paraffin (wax) or silicone.

44
Q

If the demarcation lights are dim:

a. They should be replaced since the reduced light output indicates they are near the end of their life.
b. Nothing should be done until they burn out since they are not of any value to safety.
c. Only the dim light should be replaced.
d. The facility manager should be advised to replace them.

A

a. They should be replaced since the reduced light output indicates they are near the end of their life.

45
Q

The missing step/pallet device usually uses a (an) ___ sensor to detect the missing step. This sensor must be ___ to assure that it does not unnecessarily stop the escalator or moving walk.

a. Mechanical, adjusted
b. Thermal, calibrated
c. Optical, cleaned
d. Combination, cleaned

A

c. Optical, cleaned

46
Q

When the skirt obstruction devices are tested:

a. At least four tests are required for escalators.
b. At least four test are required for escalators and four for moving walks.
c. Only one test is required for escalators and moving walks.
d. Only two tests are required for escalators

A

a. At least four tests are required for escalators.

47
Q

The handrail entry device is tested by inserting:

a. An object such as a screwdriver along side the handrail as it enters the newel.
b. A soft object such as a hose along side the handrail as it exits the newel.
c. A soft object such as a hose along side the handrail as it enters the newel.
d. Your index finger along side the handrail as it enters the newel.

A

c. A soft object such as a hose along side the handrail as it enters the newel.

48
Q

A moving walk was installed under ASME A17.1-2000. The vertical force in the center of the combplate required to operate the combplate impact device is:

a. 800 lbf (363kg)
b. 400 lbf (181kg)
c. 150 lbf (68kg)
d. 112 lbf (50.8kg)

A

c. 150 lbf (68kg)

49
Q

The acceptance test for combplate deflection requires that a weight of ___ be placed on the combplate.

a. 400 lbs (182 kg)
b. 350 lbs (159 kg)
c. 200 lbs (90.7 kg)
d. 500 lbs (227 kg)

A

b. 350 lbs (159 kg)

50
Q

The escalator step level device is required to detect displacement of ____.

a. 0.250 in. (6 mm)
b. 0.187 in. (5 mm)
c. 0.375 in. (10 mm)
d. 0.125 in. (3 mm)

A

d. 0.125 in. (3 mm)

51
Q

The purpose of the missing step or pallet device is to:

a. Prevent operation if a step or pallet is accidentally left out during maintenance or repair.
b. Prevent persons from stealing steps or pallets.
c. Prevent elevator maintenance technicians from removing steps or pallets without permission.
d. Restrict access to elevator personnel.

A

a. Prevent operation if a step or pallet is accidentally left out during maintenance or repair.

52
Q

The upthrust device is required for:

a. Escalators and moving walkways.
b. Only escalators at the lower curve.
c. Only moving walks at the exit end.
d. Escalators at both the upper and lower curve.

A

b. Only escalators at the lower curve.

53
Q

An escalator or moving walk installed under ASME A17.1c-1999 requires:

a. A stopped handrail device.
b. Both a stopped handrail device and handrail speed monitoring device.
c. A stopped handrail device on once handrail and a handrail speed monitoring device on the other.
d. A handrail speed monitoring device on both handrails.

A

d. A handrail speed monitoring device on both handrails.

54
Q

The handrail speed monitoring device is required to operate with a deviation of the handrail speed of ___%

a. 25
b. 10
c. 12
d. 15

A

d. 15

55
Q

The key operated start switch is removable in:

a. The run position only.
b. The up position only.
c. The down position only.
d. Any position.

A

a. The run position only.

56
Q

The rated speed for an escalator allowed by ASME A17.1/CSA B44 shall not exceed:

a. 150 ft/min (0.75 m/s).
b. 125 ft/min (0.625 m/s) going up.
c. 125 ft/min (0.625 m/s) going down.
d. 100 ft/min (0.5 m/s).

A

d. 100 ft/min (0.5 m/s).

57
Q

The brake torque is indicated on the:

a. Brake data plate.
b. Layout drawing.
c. Drive machine.
d. Drive motor.

A

a. Brake data plate.

58
Q

When checking the brake torque, a torque wrench should be used that has a maximum scale of:

a. 500 ft-lbf
b. That equal to the torque of the brake.
c. Approximately twice that of the expected torque of the brake.
d. Approximately three times that of the expected torque of the brake.

A

c. Approximately twice that of the expected torque of the brake.

59
Q

Speed governors are required where Variable speed AC drives, DC motors and/or the unit is not directly connected to the reduction gear for the escalator or moving walk. They are required to operate when the speed exceeds __% of rated speed for escalators and __% of rated speed for moving walks.

a. 140, 120
b. 120, 140
c. 140, 140
d. 120, 125

A

a. 140, 120

60
Q

The risk of entrapment between an escalator step and skirt panel increases with:

a. Increase clearance and increase friction.
b. Decrease clearance and decrease friction.
c. Decrease clearance and increase friction.
d. Increase clearance and decrease friction.

A

a. Increase clearance and increase friction.

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