230 machine and sheave installation exam
questions and answers
If you had a 14,500 lb. machine to lift up the hoistway, what kind of
reeving would be used for a 4,000 lb capacity portable gas hoist? -
correct answer ✅4:1
Which of the following statements best describes the fearless
traction machine? -
correct answer ✅This type of machine uses slow speed DC motors.
What is the correct minimum diameter of any sheave or drum in
contact with hoist ropes? -
correct answer ✅40 times the diameter of the rope
If a gearless machines drive sheave has a circumference of six feet,
approximately how many RPM's would be required of the drive
motor to run the car at 800 ft./ min? -
correct answer ✅133
Which of the following describes the function of the gear reduction
unit on a geared machine? -
correct answer ✅Increases the lifting capability of a small motor
questions and answers
If you had a 14,500 lb. machine to lift up the hoistway, what kind of
reeving would be used for a 4,000 lb capacity portable gas hoist? -
correct answer ✅4:1
Which of the following statements best describes the fearless
traction machine? -
correct answer ✅This type of machine uses slow speed DC motors.
What is the correct minimum diameter of any sheave or drum in
contact with hoist ropes? -
correct answer ✅40 times the diameter of the rope
If a gearless machines drive sheave has a circumference of six feet,
approximately how many RPM's would be required of the drive
motor to run the car at 800 ft./ min? -
correct answer ✅133
Which of the following describes the function of the gear reduction
unit on a geared machine? -
correct answer ✅Increases the lifting capability of a small motor
