ELEVATOR MECHANIC EXAM COMPLETE EXAM
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What is the correct minimum diameter of any sheave or drum in contact with
a hoist rope?
A) 20 times the diameter of the rope
B) 40 times the diameter of the rope
C) No minimum is required if the ropes are slung over a deflector sheave
D) No minimum is required if the ropes are slung over a secondary sheave
Answer: B
The industry standard mandates that the minimum sheave or drum diameter
be 40 times the diameter of the rope to prevent excessive bending stress and
prolong rope life.
,If a gearless machine's drive sheave has a circumference of six feet,
approximately how many RPMs would be required of the drive motor to run
the car at 800 ft/min?
A) 4800
B) 1700
C) 242
D) 133
Answer: D
RPM is calculated by dividing the speed by the circumference, so 800 ft/min
divided by 6 feet per revolution equals approximately 133 RPM.
Which of the following describes the function of the gear reduction unit on a
geared machine?
A) Allows the drive sheave to safely rotate at 1700 RPM
B) Increases the lifting capability of a small motor
C) Allows the drive sheave to carry loads over 500ft
D) Eliminates the need to use a deflector sheave
Answer: B
A gear reduction unit trades high motor speed for increased torque, which
significantly boosts the lifting capability of a relatively small motor.
On a geared worm machine, where must the oil level be kept?
A) Above the worm gear
B) Below the worm gear
C) At the center of the worm shaft
D) At the bottom of the worm shaft
,Answer: C
Maintaining the oil level at the center of the worm shaft ensures proper
lubrication of the gear and bearings without causing excessive churning or
overheating.
If a double groove worm on a geared machine has a reduction ratio of 50:1,
what are the drive sheave RPM's with the motor turning at 400 RPM?
A) 2
B) 8
C) 10
D) 20
Answer: B
The output speed is the motor speed divided by the reduction ratio; 400 RPM
divided by 50 equals 8 RPM.
A helical geared machine provides which of the following benefits?
A) Generates less noise than a worm gear machine
B) Generates less vibration than a worm gear machine
C) Requires less sound isolation than a worm gear machine
D) All of the above
Answer: D
Helical gears have more gradual, overlapping tooth engagement than worm
gears, resulting in quieter, smoother operation and reduced vibration.
The star symbol is used on the Car Operating Panel (COP) for what purpose?
A) To show where the floor buttons are located
, B) To designate the main floor
C) To make the door buttons stand out
D) To show the alarm bell location
Answer: B
The star symbol is a standard identifier on the COP to mark the main or lobby
floor for easy passenger reference.
According to ADA requirements, hall call buttons are centered at what height
above the finished floor?
A) 36 inches
B) 42 inches
C) 48 inches
D) 52 inches
Answer: B
ADA guidelines specify that hall call buttons be centered 42 inches above the
finished floor to ensure accessibility for all users.
All cab modernization work should be performed at what floor?
A) At the main lobby
B) Bottom floor
C) Top floor
D) Lowest landing
Answer: C
Performing cab modernization at the top floor provides a safe and convenient
location, often allowing the car to be fully enclosed and worked on without
disrupting other operations.