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to meed A.D.A. requirements, hall call buttons are centered at ____ above the finished floor.
a. 36"
b. 42"
c. 48"
d. 52" - CORRECT ANSWER-b. 42"
IF you had a 14,500 lb machine to lift up the hoistway, what kind of reeving would be used for a
4000lb capacity portable gas hoist?
a. 2:1
b. 3:1
c. 4:1
d. 5:1 - CORRECT ANSWER-c. 4:1
WHich of the following statements best describes the gearless traction machine?
a. this type of machine does not use any gears other than reduction gears
b. the gearless machine is comprised of a drive sheave, worm shaft and a brake.
c. This type of machine uses slow speed DC motors
d. The gearless machine is limited to mid-rise elevator installations - CORRECT ANSWER-c. this
type of machine uses slow speed DC motors
,what is the correct minimum diameter of any sheave or drum in contact with hoist rope?
a. 20x the diameter of the rope
b. 40x 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 - CORRECT ANSWER-
b. 40x the diameter of the rope
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 - CORRECT ANSWER-d. 133
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 1700rpm
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 - CORRECT ANSWER-b. increases the lifting
capability off a 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 - CORRECT ANSWER-c. at the center of the worm shaft
,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 - CORRECT ANSWER-b. 8
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. requires less overall power than a worm gear machine - CORRECT ANSWER-d. requires less
overall power than a worm gear machine
Which of the following limitations exist on new installations of drum machines?
a. limited to mid-rise service
b. can not exceed 500fpm
c. can not be used for residential installations
d. limited to 40ft of travel - CORRECT ANSWER-d. limited to 40ft of travel
on a drum machine installation, ,what effect does the actuation of the slack cable switch have?
a. the machine stops
b. the safeties set
c. the drum reverses direction
d. the car reverses direction - CORRECT ANSWER-a. the machine stops
, How often must the hoist ropes be resocketed for an overhead drum machine without any
special safety shackles?
a. once a year
b. twice a year
c. once every two years
d. once every 5 years - CORRECT ANSWER-a. once a year
if the car counterweights and drum counterweights in a drum machine installation are in the
same set of guide rails, how should they be configured?
a. the drum counterweights must be installed above the care counterweights.
b. the car counterweights must be double the weight of the drum counterweights.
c. the car counterweights must be installed above the drum counterweights
d. the drum counterweights must be double the weight of the car counterweights - CORRECT
ANSWER-c. the car counterweights must be installed above the drum counterweights
What condition must be met on drum machine installations if the counterweight is landed on
the buffer?
a. the entire drum must be fully wrapped with a layer of rope
b. one full turn of rope must remain on the drum
c. the drum must stop turning within two complete revolutions
d. the slack rope switch must close the safety circuit - CORRECT ANSWER-b. one full turn of rope
must remain on the drum
Which drive sheave groove configuration gives the best traction?
a. v-grooves
b. u-grooves
c. concave groove
d. convex groove - CORRECT ANSWER-a. v-groove