CCO PRACTICE EXAM 2024 QUESTIONS WITH 100% CORRECT ANSWERS!!

When working on rubber, cranes are rated at what percentage of tipping: a) 70% b) 75% c) 80% d) 85% - ANS 75% When a crane is working "on outriggers" the only time they should be less than fully extended is when: a) working alongside the highway and cannot block a lane b) you are handling light loads c) the main boom is being lifted d) there is a load chart for this operation - ANS there is a load chart for this operation A truck crane set up with the outriggers extended and set, and tires touching the ground, the operator should refer to what load chart: a) intermediate chart b) over the front chart c) on rubber chart d) 85% of the main chart - ANS on rubber chart Blocking paced under the ends of crawler tracks will: a) increase the crane's stability when operating over front or back b) increase the crane's stability when operating over side c) stop crane from traveling unexpectedly d)stop crane from sliding unexpectedly - ANS increase the crane's stability when operating over front or back What quadrant produces the least amount of ground pressure on a lattice crawler: a) corner b) side c) front d) rear - ANS side During assembly where should you attach slings to lift boom sections: a) to the top of main chords b) to the top end fittings c) 2 feet from end of section d) center of boom section - ANS to the top end fittings When a lattice boom truck crane is set up on outriggers, the floats or pads should always be: a) large enough to support two times the applied load b) with the tires firmly on the ground c) secured to the outriggers d) placed on the mats - ANS secured to the outriggers A truck crane operating with outriggers fully extended and set, but does not have a front outrigger, the operator should: a) operate over the front with caution b) refer to the manufacturer's working area diagram c) block under the bumper to provide more stability d) only operate over the front at a 50% reduction of the load chart - ANS refer to the manufacturer's working area diagram When a crane is operating on properly set outriggers, the tipping axis is located at the: a) radius of the counterweight b) center pin of the crane c) boom heel pins d) point where the outriggers touch the ground - ANS point where the outriggers touch the ground The purpose of placing mats or cribbing under outrigger floats is to: a) get the tires off the ground b) distribute the downward force of the float over a larger area c) allow the float to be level d) raise the operator's cab for better vision - ANS distribute the downward force of the float over a larger area A crane loses stability when its leverage on the load is: a) less than a load's leverage on the crane b) 70% of the load's leverage on the crane c) 80% of the load's leverage on the crane d) more than the load's leverage on the crane - ANS less than a load's leverage on the crane If a lattice boom truck crane is going to perform work over the front it must have: a) a second signal person stationed over the front of the crane b) a short boom incapable of tipping the crane c) a front mounted counterweight to prevent tipping in that area d) a load chart stating capacities in that area - ANS a load chart stating capacities in that area Each outrigger pad and its blocking should be sufficient to support: a) 85% of the load chart b) the total weight of the crane and its load c) the total weight of the crane and its long boom d) one-half the total weight of the crane and its load - ANS the total weight of the crane and its load When a lattice boom truck crane that is properly set up with no front outrigger and the boom is positioned over the front, the combined center of gravity of the carrier and upperworks will move: a) further from the axis b) closer to the tipping axis c) to the axis of rotation d)to the middle of the axis - ANS closer to the tipping axis What item can be removed from a carrydeck crane: a) fire extinguisher b) load chart c) anti-two-block device d) boom extension - ANS boom extension When making a lift on outriggers, the maximum ground- bearing pressure occurs: a) over the rear b) over the corner c) over the front d)over the side - ANS over the corner Blocking which is not tightly placed may fail at: a) 25% of design b) 30% of design c) 50% of design d) 80% of design - ANS 50% of design The safest speed for a crane carrying a load is: a) the crane manufacturer's speed limit b) the job site's speed limit c) the speed recommended by the superintendent d)the speed recommended by the operator - ANS the crane manufacturer's speed limit What must you do if 3 of 4 outriggers are set to the manufacturer's stated position and one is partially extended: a) cease crane operation until all outriggers are fully extended b) reduce crane capacity by 25% c) use the "on rubber" load chart d) base rating on the quadrant where the outrigger is not fully extended - ANS use the "on rubber" load chart According to ASME B30.5, you are required to pass a physical exam every: a) 1 year b) 2 years c) 3 years d) 4 years - ANS 3 years The definition of "Boom length" is: a) center of the foot pins to the center of the boom tip sheave pins b) end of the heel section to the tip of the sheaves c) center of the heel section to the center of the head section d) the outer most length of the boom from one end to the other - ANS center of the foot pins to the center of the boom tip sheave pins Timber mats work best when they are: a) bolted together b) nailed together c) tied together d) loosely stacked - ANS bolted together Increasing the distance from the crane's center of gravity to the tipping axis will: a) increase stability b) decrease stability c) increase structural competence d) decrease structural competence - ANS increase stability When a load has more leverage than the crane the effect is: a) loss of stability b) increase in stability c) increase in load capacity d) a structural failure - ANS loss of stability Blocking under the outriggers pad/float shall be: a) parallel b) sufficient to support the crane and the load c) perpendicular d) at least three layers thick - ANS sufficient to support the crane and the load A crane's ground bearing pressure can approach a weight equal to: a) 30% of the weight of the crane and the suspended load b) 50% of the weight of the crane and the suspended load c) 45% of the weight of the crane and the suspended load d) 100% of the weight of the crane and the suspended load - ANS 100% of the weight of the crane and the suspended load When setting up a crane on uneven ground, you should: a) block under the outriggers beams as close to the cylinder rod as possible b) block under the pad and keep a +-15 degree angle between the cylinder rod and the pad c) block under the pad and keep a 90 degree angle between the cylinder rod and the pad d) block under outriggers reducing capacity 10% for every 5 degrees the pad is out of level - ANS block under the pad and keep a 90 degree angle between the cylinder rod and the pad On a hydraulic truck crane that has five outriggers properly positioned and set, thee working area diagram will indicate the area "over the front" as: a) 10- degrees either side of the crane center line b) the area between the tire treads and the parallel tot he crane c) a specific area defined by the working area quadrant chart d) forward of a straight line perpendicular tot he cranes center of rotation - ANS a specific area defined by the working area quadrant chart When a crane's hydraulic boom sections are required to be extended equally and they are not, the: a) hydraulic system can be damaged b) shortest section can be overloaded c) LMI can give false readings d) longest section can be damaged - ANS longest section can be damaged When extending the outriggers you should: a) boom down to 0 degrees b) boom down 65 degrees c) make visual contact or post a signalperson d) swing over side with a low boom - ANS make visual contact or post a signalperson A crawler will exert the most ground pressure over the: a) front b) rear c) side d) corner - ANS corner Where is the best location for leveling a crane: a) carrier b) upperworks c) cab d) carbody - ANS Upperworks What is the purpose of using a Jib: a) increase load radius b) decrease load radius c) increase height d) decrease height - ANS increase height The term "Upperworks" or "Superstructure" refer to the area of the crane: a) above the turntable b) below the turntable c) in front of the boom d) behind the boom - ANS above the turntable During setup how do you determine machine clearance (counterweight, boom, outrigger): a) utilize the machine and see if you hit something b) measure for correct distances c) guess d) load chart - ANS measure for correct distances When operating a truck crane what is the most unstable allowable quadrant of operation: a) front b) rear c) side d) corner - ANS side Why use mats or cribbing: a) to lift outriggers or crawler off the ground b) to reduce ground pressure c) for long boom cranes d) to stop mud from entering the crawlers - ANS to reduce ground pressure Load radius is the distance from the center of gravity of the suspended load to the: a) center of rotation b) center of gravity of the crane c) tipping axis d) hook rollers - ANS center of roatation Why is the primary reason for using a boom extension: a) increase load radius b) decrease load radius c) increase height d) increase reach - ANS increase height When telescoping the boom section of an R/T, which section should be telescoped first: a) first b) doesn't matter c) largest d) all sections should be telescoped equally - ANS all sections should be telescoped equally How does the operator determine if correct load chart is being used: a) matching serial number b) matching model number c) matching manufacturers d) same manufacturer - ANS matching serial number Within what percentage of level does a telescopic boom crane have to be for the ratings in the load chart to remain valid: a) 1% b) 2% c) 5% d) it doesn't matter so long as the outriggers are fully extended and set - ANS 1% Unless the manufacturer's states otherwise, truck cranes generally have no lifting capacity over which area: a) on- outriggers load chart b) on- rubber load chart c) on- outriggers load chart while being careful not to swing the load over the short outrigger d) on- outriggers load chart, after shortening all outriggers to the same length as the fourth (short) outrigger - ANS on- outriggers load chart Unless the manufacturer states otherwise, truck cranes generally have no lifting capacity over which area: a) the side b) the rear c) the front d) the outriggers - ANS the front "Working radius" is defined as the distance from the: a) base of the boom to the center of the boom b) front of the crane to the center of gravity of the load c) center of rotation of the crane to the center of the load d) center of rotation of the crane to the center of gravity of the suspended load - ANS center of rotation of the crane to the center of gravity of the suspended load Rough terrain crane capacities are generally greater over the: a) front b) rear c) right side d) left side - ANS front Boom length is measured from the: a) base of the boom to the center of the boom pin sheave b) boom hinge pins to the boom tip c) boom hinge pins to the center of the boom tip sheave d) base of the boom to the boom tip - ANS boom hinge pins to the center of the boom tip sheave Truck crane capacities are usually greater over the: a) front b) rear c) front right outrigger d) side - ANS rear A truck crane is set up on outriggers. The part of the load chart governed by stability is based on what percentage of the crane's capacity: a) 85% b) 100% c) 70% d) 75% - ANS 85% A crane is set up with 3 of it's 4 outriggers fully extended and the fourth retracted. The capacity of the crane in this configuration will be found in the: a) on- outriggers chart b) on- rubber chart c) on- outrigger chart minus 20% d) on- rubber chart plus 20% - ANS on- rubber chart Blocking (cribbing) may be placed under outrigger beams: a) when beams cannot be extended all the way out b) to increase capacity c) to increase stability d) never - ANS never Timber blocking placed under the tip of the tracks on a crawler crane will: a) increase the permitted capacity of the crane b) make the crane more stable c) reduce the capacity of the crane d) make the crane less stable - ANS make the crane more stable When handling boom sections, the best place for slings to be attached is: a) at the pin connection points at the ends of the top chords b) at the lattice members c) anywhere on the top chords d) at the pin connection points at the ends of the bottom chords - ANS at the pin connection points at the ends of the top chords When setting a crane up on outriggers, the wheel of the crane should: a) just touch the ground b) be as a high as possible off the ground c) be just high enough off the ground to relieve the tires of crane weight d) stay firmly on the ground to support the crane - ANS be just high enough off the ground to relieve the tires of crane weight If you move a crawler crane from the soft ground to harder ground, ground bearing pressure will: a) increase b) decrease by a third c) remain the same d) decrease by half - ANS increase On pick and carry operations, you should: a) keep the boom as short as possible b) keep the load as high above the ground as possible c) ensure the load is as far from the ground as possible d) use maximum boom length - ANS keep the boom as short as possible On a crawler crane, ground bearing pressure is greatest: a) over the right side b) over the end c) over the corner d) over the left side - ANS over the corner When preparing to hoist a light load, the hook should be positioned: a) slightly to the side you're planning to swing to b) slightly to the side opposite you plan to swing to c) directly above the loads center of gravity d) above the edge of the load chart to the crane - ANS directly above the loads center of gravity As you boom down, the leverage of the load on the crane will: a) increase b) decrease c) stay the same d) depends on the weight of the load being lifted - ANS increase Where does an R/T crane create the most ground bearing pressure when making a lift on outriggers: a) over the front b) over the rear c) over the side d) over the corner - ANS over the corner A hydraulic truck crane has all outrigger extended with all the tires firmly planted on the ground. In the configuration the operator must use what load capacity chart: a) on outriggers partially extended b) on rubber c) on rubber pick and carry d) on outriggers - ANS on rubber When lifting with a crawler crane how can operators reduce ground-bearing pressure: a) lift your over the front b) lift over the rear c) lift over the side d) lift over the corner - ANS lift over the side