Rigging practices course Questions and Answers 2023 with
complete solution
1. A load chart range diagram can best be used to help identify:: net
capacity
2. for mobile crane working at maximum radius, exceeding what
percentage of the cranes capacity requires the radius to be verified?: 80%
3. the minimum depth of thread engagement for a 1/2 in eyebolt into
steel object is?: 3/4 in
4. when tying knots in synthetic rope lashing, the rated load is increased
by 50% ?: false
5. the size of shackle that can be used in the eye of a wire rope sling must
be
the wire rope size?: equal to or greater than
6. a shackle must be marked with the rated load, re-inspected due date,
and the date manufacture?: false
7. when working near energized power lines where the crane or load could
cross the absolute limit of approach, what additional requirements must
the crane team follow?: designated spotter must be stationed to watch
clearances
8. the load weight of a personnel lift must not exceed of the hoists
rated capacity for the working radius ?: (50%)
9.a manufacturer's certificate of proof test may satisfy the initial test
require- ments for rigging equipment?: false
10.which of the following operator actions will most likely cause a
reduction in the capacity of a mobile crane?: booming down
11.an angular pull of 45 degrees is allowed on non shouldered type
eye bolts?: false
12.two slings creating a 60 degree sling angle are used to lift a 4,000
pound item. the appropriate rated load for each sling is 2,000 pounds.:
false
13.when are loads allowed to be moved over personnel?: never
14.given a 1/2 in steel walled empty cylindrical tank that is opened at
one end, calculate its weight (round answer to the nearest hundred):
1800 lbs
15.a crane accident occurs when any one of the elements in the crane
operating envelope fails to perform correctly during crane operations,
1/5
, Rigging practices course Questions and Answers 2023 with
complete solution
main- tenance, or testing, which results in any of the following except::
over rigging the load
16.a straight-line hitch is good for of a sling rated load?: 100%
2/5
, Rigging practices course Questions and Answers 2023 with
complete solution
17.there are three slings hanging from a hook. each sling has a rated
capacity of 2,000 lbs. what is the heaviest load that could be lifted
using these slings if they were attached to a single point: 2000 lbs
18.why must hoisting be stopped once the load is completely off
the ground?: to determine sling angle stress
19.the minimum crane team consist of ?: the crane operator and
rig- ger-in-charge
20.while traveling a crane with a load, loads should be kept?: as low
as possible
21.attachment points must be visually inspected?: before and after each
use
22.when rigging your own loads, you are responsible for?: all of the above
23.rigging gear test and inspection records must include:: all of the
informa- tion listed above
24.the crane operator is responsible for the safe of the crane:
operation
25.if a crane team member sees an obstruction in the crane operating
envelope that could pose a threat to the crane operations, what course
of action is the best to take?: notify the operator and work cautiously
near the obstruction
26.what is the minimum distance any part of the crane or load may
approach an energized power line under 50,000 volts during a proposed
operation?: - 20ft
27. according to the NAVFAC P-307, what are the two types of crane lifts
?: complex and non complex
28.when making a four-point lift using slings, they should normally be
chosen such that legs have/has the capacity to support the entire
load weight including the additional stress due to lifting angle.: 2
29.the volume of the cylinder is cubic feet: 9.42
30.calculate the tension in leg A: 1607
31.increasing the sling angle from horizontal the stress in the
sling?: decreases
32.weight distribution at the attachment points is determined by
measuring the...: distance they are from the CG
3/5
complete solution
1. A load chart range diagram can best be used to help identify:: net
capacity
2. for mobile crane working at maximum radius, exceeding what
percentage of the cranes capacity requires the radius to be verified?: 80%
3. the minimum depth of thread engagement for a 1/2 in eyebolt into
steel object is?: 3/4 in
4. when tying knots in synthetic rope lashing, the rated load is increased
by 50% ?: false
5. the size of shackle that can be used in the eye of a wire rope sling must
be
the wire rope size?: equal to or greater than
6. a shackle must be marked with the rated load, re-inspected due date,
and the date manufacture?: false
7. when working near energized power lines where the crane or load could
cross the absolute limit of approach, what additional requirements must
the crane team follow?: designated spotter must be stationed to watch
clearances
8. the load weight of a personnel lift must not exceed of the hoists
rated capacity for the working radius ?: (50%)
9.a manufacturer's certificate of proof test may satisfy the initial test
require- ments for rigging equipment?: false
10.which of the following operator actions will most likely cause a
reduction in the capacity of a mobile crane?: booming down
11.an angular pull of 45 degrees is allowed on non shouldered type
eye bolts?: false
12.two slings creating a 60 degree sling angle are used to lift a 4,000
pound item. the appropriate rated load for each sling is 2,000 pounds.:
false
13.when are loads allowed to be moved over personnel?: never
14.given a 1/2 in steel walled empty cylindrical tank that is opened at
one end, calculate its weight (round answer to the nearest hundred):
1800 lbs
15.a crane accident occurs when any one of the elements in the crane
operating envelope fails to perform correctly during crane operations,
1/5
, Rigging practices course Questions and Answers 2023 with
complete solution
main- tenance, or testing, which results in any of the following except::
over rigging the load
16.a straight-line hitch is good for of a sling rated load?: 100%
2/5
, Rigging practices course Questions and Answers 2023 with
complete solution
17.there are three slings hanging from a hook. each sling has a rated
capacity of 2,000 lbs. what is the heaviest load that could be lifted
using these slings if they were attached to a single point: 2000 lbs
18.why must hoisting be stopped once the load is completely off
the ground?: to determine sling angle stress
19.the minimum crane team consist of ?: the crane operator and
rig- ger-in-charge
20.while traveling a crane with a load, loads should be kept?: as low
as possible
21.attachment points must be visually inspected?: before and after each
use
22.when rigging your own loads, you are responsible for?: all of the above
23.rigging gear test and inspection records must include:: all of the
informa- tion listed above
24.the crane operator is responsible for the safe of the crane:
operation
25.if a crane team member sees an obstruction in the crane operating
envelope that could pose a threat to the crane operations, what course
of action is the best to take?: notify the operator and work cautiously
near the obstruction
26.what is the minimum distance any part of the crane or load may
approach an energized power line under 50,000 volts during a proposed
operation?: - 20ft
27. according to the NAVFAC P-307, what are the two types of crane lifts
?: complex and non complex
28.when making a four-point lift using slings, they should normally be
chosen such that legs have/has the capacity to support the entire
load weight including the additional stress due to lifting angle.: 2
29.the volume of the cylinder is cubic feet: 9.42
30.calculate the tension in leg A: 1607
31.increasing the sling angle from horizontal the stress in the
sling?: decreases
32.weight distribution at the attachment points is determined by
measuring the...: distance they are from the CG
3/5
