NAVFAC P-307 Training Exam 2023 with complete
solution
What types of power does a category 1 or 4 crane generally use and what is it's
source?
A hook is what type of component?
Load-bearing part
Hydraulic foot brakes are what type of group of components
Load-controlling parts
Load-_____ parts are those that support the load.
Bearing
How is electrical current conveyed from the revolving portion of the crane to the
lower crane structure?
Through the collector ring system
Safety devices that provide protection for personnel and equipment are
considered _________ safety devices?
General
Safety devices that affect the safe load lifting and handling capabilities of the
equipment are considered ______________ safety devices
Operational
which of the following does not affect the safe operation of the crane
General safety devices
A travel alarm is what type of group of components
General safety devices
to find the weight of a aluminum plate, you would multiply...
Square feet times material weight per square foot based on a specified thickness
A triangular shaped 1 inch thick metal plate has a base of a 10 feet and a height of
15 feet. What is the area of the plate?
75 square feet
A circular shaped 1/2 inch thick aluminum plate has a diameter of 7 feet. What is
the area of the plate rounded up?
39 square feet
A complex shape of 1 inch thick aluminum plate has a rectangular area of 64
square feet and triangular area of 16 square feet. if aluminum weights 14 pounds
per square foot, how much does the plate weigh (rounded up)
1,200lbs
A complex shape of 1 inch thick aluminum plate measures 6 feet long on the top
edge, 8 feet wide on the left edge , 12 feet long on the bottom edge, ending with a
10 foot long hypotenuse connecting back to the top edge. What is the correct
equation to find the area of the triangular shape?
8 x 6 /2
the formula for determining the area of a triangular shaped object is
Base x Height divided by 2
A box has 27 cubic feet of sand in it. Sand weights 105 lbs per cubic foot. the box
weighs 1200 lbs empty. the correct equation to find the total weight is
, 27 x 105 = 2,835 + 1,200 = 4, 035
A cylinder is made of solid aluminum which has a unit weight of 165 pounds per
cubic foot. What is the weight of this cylinder if the diameter is 4 feet and the
height is 5 feet?
10, 362 lbs
A rectangular shaped tank has a length of 24 feet, a width of 10 feet, and a height
of 12 feet. What is the volume of the tank?
2,880 cubic feet
An attachment point is 2 feet from the center of gravity and the other attachment
point is 6 feet from the center of gravity. What is the correct percentage of weight
distribution to each attachment point with the attachment point 2 feet from the
center being listed first?
75%, 25%
center of gravity is best described as
where all the weight is concentrated
the center of gravity is located below the center of balance.
false
the center of gravity (CG) is always located within the object.
false
Attachment point #1 is 6 feet from the center of gravity (CG). There is a 10,000 lbs.
load attached. What is the correct equation to find the weight distribution for
attachment point #1?
3 divided by 9 multiplied by 10,000 (3/9 x 10,000)
the center of gravity (CG) will always find it's way directly under the crane hook
when lifted off the ground.
true
A 60 degree sling angle will be formed when you match the sling length to the
diagonal distance between attachment points.
true
An object has a length of 5 feet, a width of 3 feet, and a distance of 5 feet 6 inches
between attachment points. What length sling would you select to ensure the
horizontal sling angle was 60 degrees or greater?
6 feet
to find the sling angle stress
multiply the weight in the attachment point times the angle factor
the reason test and inspection is required is to...
prevent personal injury
identify sub-standard equipment
remove unsafe equipment
rigging gear identification markings applied by the activity usually indicate that
the equipment is
in an inspection program
equipment test and inspection requirements in section 14 of NAVFAC P-307 do
not apply to
OEM installed bolt-on pads
which of the following markings are required on lashing?
solution
What types of power does a category 1 or 4 crane generally use and what is it's
source?
A hook is what type of component?
Load-bearing part
Hydraulic foot brakes are what type of group of components
Load-controlling parts
Load-_____ parts are those that support the load.
Bearing
How is electrical current conveyed from the revolving portion of the crane to the
lower crane structure?
Through the collector ring system
Safety devices that provide protection for personnel and equipment are
considered _________ safety devices?
General
Safety devices that affect the safe load lifting and handling capabilities of the
equipment are considered ______________ safety devices
Operational
which of the following does not affect the safe operation of the crane
General safety devices
A travel alarm is what type of group of components
General safety devices
to find the weight of a aluminum plate, you would multiply...
Square feet times material weight per square foot based on a specified thickness
A triangular shaped 1 inch thick metal plate has a base of a 10 feet and a height of
15 feet. What is the area of the plate?
75 square feet
A circular shaped 1/2 inch thick aluminum plate has a diameter of 7 feet. What is
the area of the plate rounded up?
39 square feet
A complex shape of 1 inch thick aluminum plate has a rectangular area of 64
square feet and triangular area of 16 square feet. if aluminum weights 14 pounds
per square foot, how much does the plate weigh (rounded up)
1,200lbs
A complex shape of 1 inch thick aluminum plate measures 6 feet long on the top
edge, 8 feet wide on the left edge , 12 feet long on the bottom edge, ending with a
10 foot long hypotenuse connecting back to the top edge. What is the correct
equation to find the area of the triangular shape?
8 x 6 /2
the formula for determining the area of a triangular shaped object is
Base x Height divided by 2
A box has 27 cubic feet of sand in it. Sand weights 105 lbs per cubic foot. the box
weighs 1200 lbs empty. the correct equation to find the total weight is
, 27 x 105 = 2,835 + 1,200 = 4, 035
A cylinder is made of solid aluminum which has a unit weight of 165 pounds per
cubic foot. What is the weight of this cylinder if the diameter is 4 feet and the
height is 5 feet?
10, 362 lbs
A rectangular shaped tank has a length of 24 feet, a width of 10 feet, and a height
of 12 feet. What is the volume of the tank?
2,880 cubic feet
An attachment point is 2 feet from the center of gravity and the other attachment
point is 6 feet from the center of gravity. What is the correct percentage of weight
distribution to each attachment point with the attachment point 2 feet from the
center being listed first?
75%, 25%
center of gravity is best described as
where all the weight is concentrated
the center of gravity is located below the center of balance.
false
the center of gravity (CG) is always located within the object.
false
Attachment point #1 is 6 feet from the center of gravity (CG). There is a 10,000 lbs.
load attached. What is the correct equation to find the weight distribution for
attachment point #1?
3 divided by 9 multiplied by 10,000 (3/9 x 10,000)
the center of gravity (CG) will always find it's way directly under the crane hook
when lifted off the ground.
true
A 60 degree sling angle will be formed when you match the sling length to the
diagonal distance between attachment points.
true
An object has a length of 5 feet, a width of 3 feet, and a distance of 5 feet 6 inches
between attachment points. What length sling would you select to ensure the
horizontal sling angle was 60 degrees or greater?
6 feet
to find the sling angle stress
multiply the weight in the attachment point times the angle factor
the reason test and inspection is required is to...
prevent personal injury
identify sub-standard equipment
remove unsafe equipment
rigging gear identification markings applied by the activity usually indicate that
the equipment is
in an inspection program
equipment test and inspection requirements in section 14 of NAVFAC P-307 do
not apply to
OEM installed bolt-on pads
which of the following markings are required on lashing?
