©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
Mobile Crane Review Exam Questions And
Answers 2025 Update.
What is the purpose of placing mats or cribbing under or cribbing under outrigger floats? -
Answer✔Distribute the force over a larger area.
Where is the best location for leveling a crane? - Answer✔Upperworks. (A revolving frame of
equipment on which operating machinery are mounted along operator's can)
Before leveling a mobile crane on outriggers, an operator should ensure: - Answer✔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? - Answer✔Keeping a 90 degree angle between cylinder rod and pad.
When may blocking (cribbing) be placed under outrigger beams on mobile cranes? -
Answer✔Never approved.
Mobile cranes should be level to within what percent of grade? - Answer✔1 %
Timber crane mats work best when they are: - Answer✔Bolted together
When arriving in the crane at the job site, the operator should first determine the condition of
the: - Answer✔Access roads
What surface listed below would Not be a good location for assembly or setup of a mobile
crane? - Answer✔A. Above compacted fill
B. Above highway asphalt
C. Above underground vaults
D. Above highway concrete
Each outrigger pad and its blocking should be sufficient to support? - Answer✔The total weight
of the crane and its load.
How does high wind affect a mobile crane with a long boom? - Answer✔Introduces side load
onto the boom
1
,©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
When is the only time the outrigger beams should be less than fully extended? - Answer✔The
load chart indicates that this is allowed (always make sure that it is safe first)
What is the primary purpose for a rooster sheave or auxiliary boom point sheave? -
Answer✔separate the load hoist lines.
Eccentric main boom tip reeving causes which of the following: - Answer✔twisting of the main
boom
which type of wire rope listed below is installed on MOST cranes?
a. right regular lay
b. right alternate lay
c. left regular lay
d. left alternate lay - Answer✔a. right regular lay
The hoist drum flange shall extend a minimum of _______ over the top layer of wire rope at all
times while crane is in operation.
a. 1/2 inch
b. 1 inch
c. 1 1/2 inch
d. 2 inch - Answer✔1/2 inch
Which type of wire rope listed below is installed on most cranes?
a. main hoist line
b. boom hoist line
c. Auxiliary hoist line
d. pendant line - Answer✔pendant line
when lifting on outriggers, the floats or pads should always be:
a. sufficient to support three times the applies load
b. raised to touch the tires firmly on the ground
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
c. secured to the outriggers cylinder
d. secured to the mats - Answer✔secured to the outriggers cylinder
on a mobile crane, how many broken wires are permitted at the connection of a pendant
before it must be taken out of service?
a. 6
b. 5
c. 3
d. 1 - Answer✔1
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?
a. 4
b. 3
c. 5
d. 6 - Answer✔6
what is the minimum design (unless rotation resistant) factor required for a right regular lay,
boom or hoist wire rope?
a. 5
b. 3.5
c. 2.5
d. 7 - Answer✔3.5
Type 1 rotation resistant hoist wire rope has a design factor of:
a. 2.5 to 1
b. 3 to 1
c. 3.5 to 1
d. 5 to 1 - Answer✔5 to 1
3
Mobile Crane Review Exam Questions And
Answers 2025 Update.
What is the purpose of placing mats or cribbing under or cribbing under outrigger floats? -
Answer✔Distribute the force over a larger area.
Where is the best location for leveling a crane? - Answer✔Upperworks. (A revolving frame of
equipment on which operating machinery are mounted along operator's can)
Before leveling a mobile crane on outriggers, an operator should ensure: - Answer✔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? - Answer✔Keeping a 90 degree angle between cylinder rod and pad.
When may blocking (cribbing) be placed under outrigger beams on mobile cranes? -
Answer✔Never approved.
Mobile cranes should be level to within what percent of grade? - Answer✔1 %
Timber crane mats work best when they are: - Answer✔Bolted together
When arriving in the crane at the job site, the operator should first determine the condition of
the: - Answer✔Access roads
What surface listed below would Not be a good location for assembly or setup of a mobile
crane? - Answer✔A. Above compacted fill
B. Above highway asphalt
C. Above underground vaults
D. Above highway concrete
Each outrigger pad and its blocking should be sufficient to support? - Answer✔The total weight
of the crane and its load.
How does high wind affect a mobile crane with a long boom? - Answer✔Introduces side load
onto the boom
1
,©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
When is the only time the outrigger beams should be less than fully extended? - Answer✔The
load chart indicates that this is allowed (always make sure that it is safe first)
What is the primary purpose for a rooster sheave or auxiliary boom point sheave? -
Answer✔separate the load hoist lines.
Eccentric main boom tip reeving causes which of the following: - Answer✔twisting of the main
boom
which type of wire rope listed below is installed on MOST cranes?
a. right regular lay
b. right alternate lay
c. left regular lay
d. left alternate lay - Answer✔a. right regular lay
The hoist drum flange shall extend a minimum of _______ over the top layer of wire rope at all
times while crane is in operation.
a. 1/2 inch
b. 1 inch
c. 1 1/2 inch
d. 2 inch - Answer✔1/2 inch
Which type of wire rope listed below is installed on most cranes?
a. main hoist line
b. boom hoist line
c. Auxiliary hoist line
d. pendant line - Answer✔pendant line
when lifting on outriggers, the floats or pads should always be:
a. sufficient to support three times the applies load
b. raised to touch the tires firmly on the ground
2
, ©THESTAR 2024/2025 ALL RIGHTS RESERVED 12:54PM.
c. secured to the outriggers cylinder
d. secured to the mats - Answer✔secured to the outriggers cylinder
on a mobile crane, how many broken wires are permitted at the connection of a pendant
before it must be taken out of service?
a. 6
b. 5
c. 3
d. 1 - Answer✔1
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?
a. 4
b. 3
c. 5
d. 6 - Answer✔6
what is the minimum design (unless rotation resistant) factor required for a right regular lay,
boom or hoist wire rope?
a. 5
b. 3.5
c. 2.5
d. 7 - Answer✔3.5
Type 1 rotation resistant hoist wire rope has a design factor of:
a. 2.5 to 1
b. 3 to 1
c. 3.5 to 1
d. 5 to 1 - Answer✔5 to 1
3
