CCO WRITTEN CORE STUDY GUIDE UPDATED QUESTIONS AND
ANSWERS
what is the purpose of Mats or cribbing under outrigger floats - CORRECT ANSWER✅✅✅distribute
the force over a larger area
where is the best location to level a crane - CORRECT ANSWER✅✅✅upper works
Before leveling a mobile Crane on out riggers and operator should ensure - CORRECT
ANSWER✅✅✅There is no weight of the Crane bearing on any tires
Parading a mobile Crane with a long boom on uneven ground what support conditions should be
considered - CORRECT ANSWER✅✅✅Keeping a 90ﾟ angle between cylinder rod and pad
One may blocking or cribbing be placed under outrigger beams on mobile cranes - CORRECT
ANSWER✅✅✅Never approved
Mobile cranes should be level to within what percent of grade - CORRECT ANSWER✅✅✅One
percent
Timber Crane mats work best when they are - CORRECT ANSWER✅✅✅Bolted together
When arriving in the Crane at the job site the operator should 1st determine the condition of - CORRECT
ANSWER✅✅✅Access roads
White surface listed below would not be a good location for assembly or set up of a mobile Crane -
CORRECT ANSWER✅✅✅Above underground vaults
Each outrigger pad and it's blocking should be sufficient to support - CORRECT ANSWER✅✅✅The
total weight of the Crane and its load
How does high wind effect a mobile Crane with a long Boom - CORRECT ANSWER✅✅✅Introduces
side load on to the boom
What is the only time the out rigger beam should be less than fully extended - CORRECT
ANSWER✅✅✅The load chart indicates that this is allowed
What is the primary purpose for rooster sheave or auxiliary boom point sheave - CORRECT
ANSWER✅✅✅To separate the load hoist lines
Eccentric main boom tip reaving causes which of the following - CORRECT ANSWER✅✅✅Twisting of
the main boom
Which type of wire rope listed below is installed on most mobile cranes - CORRECT
ANSWER✅✅✅right regular leg
The Hoist drum flange shall extend a minimum of what distance over the top layer of wire rope at all
times while Crane is in operation - CORRECT ANSWER✅✅✅1/2 inch
, Which of the following is classified has standing wire rope - CORRECT ANSWER✅✅✅Pendant lines
When lifting on outriggers to floats or pads should Always be - CORRECT ANSWER✅✅✅Secured to
the out rigger cylinders
How many randomly broken wires in a lay length must there be on a mobile Crane hoist line before it
should be removed from service - CORRECT ANSWER✅✅✅Six
What is the minimum design factor required for a write regular lay boom or hoist wire - CORRECT
ANSWER✅✅✅3.5
On a mobile Crane how many broken wires are permitted at the end connection of a pennant line
before it must be taken out of service - CORRECT ANSWER✅✅✅1
Type one rotation resistant coyest wire rope has a design factor of - CORRECT ANSWER✅✅✅5 to 1
It is important to know when lubricating Crane hoists wire rope that the lubricant must - CORRECT
ANSWER✅✅✅Not hinder a visual inspection
How often is the competent person required to inspect the running wire rope on a mobile - CORRECT
ANSWER✅✅✅Each shift
On mobile cranes how many broken wires must be present and one strand of One Ley for running wire
rope to be removed from service - CORRECT ANSWER✅✅✅Three
How many randomly distributed broken wires in a rotation resistant hoist wire rope are considered For
replacement - CORRECT ANSWER✅✅✅2 broken wires in 6 rope diameters
According to osha what is the minimum number of full wraps of wire rope that Must remain on hoist
drums in all service conditions - CORRECT ANSWER✅✅✅2
On whose recommendations should a mobile Crane preventative maintenance program be developed -
CORRECT ANSWER✅✅✅Crane manufacturer
On a mobile Crane the measurement for a load radius is the distance from the center of gravity of the
suspended load to the - CORRECT ANSWER✅✅✅Center of rotation of the Crane
On a mobile Crane should load the applied when determining the proper boom angle - CORRECT
ANSWER✅✅✅Yes
On mobile cranes range diagram boom length and boom angle can be used to determine - CORRECT
ANSWER✅✅✅Load radius
On a mobile Crane what is the weight of the stowed jib that is deducted in load chart calculations called
- CORRECT ANSWER✅✅✅Effective weight
When determining boom tip elevation for a mobile Crane the user could - CORRECT
ANSWER✅✅✅Use the range diagram
ANSWERS
what is the purpose of Mats or cribbing under outrigger floats - CORRECT ANSWER✅✅✅distribute
the force over a larger area
where is the best location to level a crane - CORRECT ANSWER✅✅✅upper works
Before leveling a mobile Crane on out riggers and operator should ensure - CORRECT
ANSWER✅✅✅There is no weight of the Crane bearing on any tires
Parading a mobile Crane with a long boom on uneven ground what support conditions should be
considered - CORRECT ANSWER✅✅✅Keeping a 90ﾟ angle between cylinder rod and pad
One may blocking or cribbing be placed under outrigger beams on mobile cranes - CORRECT
ANSWER✅✅✅Never approved
Mobile cranes should be level to within what percent of grade - CORRECT ANSWER✅✅✅One
percent
Timber Crane mats work best when they are - CORRECT ANSWER✅✅✅Bolted together
When arriving in the Crane at the job site the operator should 1st determine the condition of - CORRECT
ANSWER✅✅✅Access roads
White surface listed below would not be a good location for assembly or set up of a mobile Crane -
CORRECT ANSWER✅✅✅Above underground vaults
Each outrigger pad and it's blocking should be sufficient to support - CORRECT ANSWER✅✅✅The
total weight of the Crane and its load
How does high wind effect a mobile Crane with a long Boom - CORRECT ANSWER✅✅✅Introduces
side load on to the boom
What is the only time the out rigger beam should be less than fully extended - CORRECT
ANSWER✅✅✅The load chart indicates that this is allowed
What is the primary purpose for rooster sheave or auxiliary boom point sheave - CORRECT
ANSWER✅✅✅To separate the load hoist lines
Eccentric main boom tip reaving causes which of the following - CORRECT ANSWER✅✅✅Twisting of
the main boom
Which type of wire rope listed below is installed on most mobile cranes - CORRECT
ANSWER✅✅✅right regular leg
The Hoist drum flange shall extend a minimum of what distance over the top layer of wire rope at all
times while Crane is in operation - CORRECT ANSWER✅✅✅1/2 inch
, Which of the following is classified has standing wire rope - CORRECT ANSWER✅✅✅Pendant lines
When lifting on outriggers to floats or pads should Always be - CORRECT ANSWER✅✅✅Secured to
the out rigger cylinders
How many randomly broken wires in a lay length must there be on a mobile Crane hoist line before it
should be removed from service - CORRECT ANSWER✅✅✅Six
What is the minimum design factor required for a write regular lay boom or hoist wire - CORRECT
ANSWER✅✅✅3.5
On a mobile Crane how many broken wires are permitted at the end connection of a pennant line
before it must be taken out of service - CORRECT ANSWER✅✅✅1
Type one rotation resistant coyest wire rope has a design factor of - CORRECT ANSWER✅✅✅5 to 1
It is important to know when lubricating Crane hoists wire rope that the lubricant must - CORRECT
ANSWER✅✅✅Not hinder a visual inspection
How often is the competent person required to inspect the running wire rope on a mobile - CORRECT
ANSWER✅✅✅Each shift
On mobile cranes how many broken wires must be present and one strand of One Ley for running wire
rope to be removed from service - CORRECT ANSWER✅✅✅Three
How many randomly distributed broken wires in a rotation resistant hoist wire rope are considered For
replacement - CORRECT ANSWER✅✅✅2 broken wires in 6 rope diameters
According to osha what is the minimum number of full wraps of wire rope that Must remain on hoist
drums in all service conditions - CORRECT ANSWER✅✅✅2
On whose recommendations should a mobile Crane preventative maintenance program be developed -
CORRECT ANSWER✅✅✅Crane manufacturer
On a mobile Crane the measurement for a load radius is the distance from the center of gravity of the
suspended load to the - CORRECT ANSWER✅✅✅Center of rotation of the Crane
On a mobile Crane should load the applied when determining the proper boom angle - CORRECT
ANSWER✅✅✅Yes
On mobile cranes range diagram boom length and boom angle can be used to determine - CORRECT
ANSWER✅✅✅Load radius
On a mobile Crane what is the weight of the stowed jib that is deducted in load chart calculations called
- CORRECT ANSWER✅✅✅Effective weight
When determining boom tip elevation for a mobile Crane the user could - CORRECT
ANSWER✅✅✅Use the range diagram
