Comprehensive Review with Over 400 Practice
Questions and Answer (4 Full-Length Exams)
Practice1
1. 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
Ans>> 40x the diameter of the rope
2. 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
Ans>> 133
3. 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
Ans>> increases the lifting capability off a small motor
4. 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
Ans>> at the center of the worm shaft
,5. 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
Ans>> 8
6. 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
Ans>> requires less overall power than a worm gear machine
7. Which of the following limitations exist on new installations of drum ma-
chines?
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
Ans>> limited to 40ft of travel
, 8. 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
Ans>> the machine stops
9. The minimum clearance form the floor to the suspended ceiling is
80"
b. 96"
c. 7'3"
d. 8'2"
Ans>> 80"
10. what should you be aware of when removing a cab for replacement?
a. The weight that is to be removed from the ceiling.
b. The original weight and counterbalancing.
c. How much the cab was out of square.
d. Cover the panels so they do not get banged up.
Ans>> The original weight and counterbalancing.