NCCCO CORE Study Guide
Questions And Correct Answers
Before leveling a mobile crane on outriggers, an operator should ensure:
there is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support
condition should be considered?
Keeping 90 degree angle between cylinder rod and pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave?
Separate the boom hoist lines
How many randomly broken wires in a lay length must there be on a mobile
cranes hoist line, before it should be removed from service?
6
,On a mobile crane, how many broken wires are permitted at the end connection
of a pendent before it must be taken out of service?
1
Type 1 rotation resistant hoist wire rope has a design factor of:
5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire
rope are considered for replacement?
2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below?
Gross capacity minus capacity deductions
, Mobile cranes that are set up on barges, shall have a list chart provided by which
of the entities listed below?
Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of
tipping?
75%
How does the effective weight of a slowed extension relate to the actual weight
of the extension?
Higher than the actual weight.
When load radius is between radii values, the operator must use the:
longer radius
Questions And Correct Answers
Before leveling a mobile crane on outriggers, an operator should ensure:
there is no weight of the crane bearing on any tires
Operating a mobile crane with a long boom, on uneven ground, what support
condition should be considered?
Keeping 90 degree angle between cylinder rod and pad
What is the primary purpose fir a rooster sheave or auxiliary boom point sheave?
Separate the boom hoist lines
How many randomly broken wires in a lay length must there be on a mobile
cranes hoist line, before it should be removed from service?
6
,On a mobile crane, how many broken wires are permitted at the end connection
of a pendent before it must be taken out of service?
1
Type 1 rotation resistant hoist wire rope has a design factor of:
5 to 1
How many randomly distributed broken wires in rotation- resistant hoist wire
rope are considered for replacement?
2 broken wires in 6 rope diameters
The term net capacity is best defined by which of the terms listed below?
Gross capacity minus capacity deductions
, Mobile cranes that are set up on barges, shall have a list chart provided by which
of the entities listed below?
Manufacturer
When lifting loads on tires, mobile cranes are rated at what percentage of
tipping?
75%
How does the effective weight of a slowed extension relate to the actual weight
of the extension?
Higher than the actual weight.
When load radius is between radii values, the operator must use the:
longer radius
