Mobile Crane Review Questions With
Correct Answers
What is the purpose of placing mats or cribbing under or cribbing under
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outrigger floats? - CORRECT ANSWER✔✔-Distribute the force over a
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larger area.
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Where is the best location for leveling a crane? - CORRECT ANSWER✔✔-
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Upperworks. (A revolving frame of equipment on which operating
| | | | | | | | |
machinery are mounted along operator's can)
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Before leveling a mobile crane on outriggers, an operator should ensure:
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|- CORRECT 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? - CORRECT ANSWER✔✔-
| | | | | | |
Keeping a 90 degree angle between cylinder rod and pad.
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When may blocking (cribbing) be placed under outrigger beams on
| | | | | | | | | |
mobile cranes? - CORRECT ANSWER✔✔-Never approved.
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,Mobile cranes should be level to within what percent of grade? -
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CORRECT ANSWER✔✔-1 % | |
Timber crane mats work best when they are: - CORRECT ANSWER✔✔-
| | | | | | | | | |
Bolted together |
When arriving in the crane at the job site, the operator should first
| | | | | | | | | | | | |
determine the condition of the: - CORRECT ANSWER✔✔-Access roads
| | | | | | | |
What surface listed below would Not be a good location for assembly or
| | | | | | | | | | | |
|setup of a mobile crane? - CORRECT ANSWER✔✔-A. Above compacted
| | | | | | | | | |
fill |
B. Above highway asphalt
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C. Above underground vaults
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D. Above highway concrete
| | |
Each outrigger pad and its blocking should be sufficient to support? -
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CORRECT ANSWER✔✔-The total weight of the crane and its load.
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How does high wind affect a mobile crane with a long boom? - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-Introduces side load onto the boom
| | | | | |
,When is the only time the outrigger beams should be less than fully
| | | | | | | | | | | | |
extended? - CORRECT 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? - CORRECT ANSWER✔✔-separate the load hoist lines.
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Eccentric main boom tip reeving causes which of the following: -
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CORRECT ANSWER✔✔-twisting of the main boom
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which type of wire rope listed below is installed on MOST cranes?
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a. right regular lay
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b. right alternate lay
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c. left regular lay
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d. left alternate lay - CORRECT ANSWER✔✔-a. right regular lay
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The hoist drum flange shall extend a minimum of _______ over the top
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layer of wire rope at all times while crane is in operation.
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a. 1/2 inch
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b. 1 inch
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, c. 1 1/2 inch
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d. 2 inch - CORRECT ANSWER✔✔-1/2 inch
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Which type of wire rope listed below is installed on most cranes?
| | | | | | | | | | | |
a. main hoist line
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b. boom hoist line
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c. Auxiliary hoist line
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d. pendant line - CORRECT ANSWER✔✔-pendant line
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when lifting on outriggers, the floats or pads should always be:
| | | | | | | | | | |
a. sufficient to support three times the applies load
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b. raised to touch the tires firmly on the ground
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c. secured to the outriggers cylinder
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d. secured to the mats - CORRECT ANSWER✔✔-secured to the
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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?
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a. 6
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Correct Answers
What is the purpose of placing mats or cribbing under or cribbing under
| | | | | | | | | | | | |
outrigger floats? - CORRECT ANSWER✔✔-Distribute the force over a
| | | | | | | | |
larger area.
|
Where is the best location for leveling a crane? - CORRECT 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:
| | | | | | | | | |
|- CORRECT 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? - CORRECT ANSWER✔✔-
| | | | | | |
Keeping a 90 degree angle between cylinder rod and pad.
| | | | | | | | |
When may blocking (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✔✔-1 % | |
Timber crane mats work best when they are: - CORRECT ANSWER✔✔-
| | | | | | | | | |
Bolted together |
When arriving in the crane at the job site, the operator should first
| | | | | | | | | | | | |
determine the condition of the: - CORRECT ANSWER✔✔-Access roads
| | | | | | | |
What surface listed below would Not be a good location for assembly or
| | | | | | | | | | | |
|setup of a mobile crane? - CORRECT 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? -
| | | | | | | | | | | |
CORRECT ANSWER✔✔-The total weight of the crane and its load.
| | | | | | | | |
How does high wind affect a mobile crane with a long boom? - CORRECT
| | | | | | | | | | | | |
ANSWER✔✔-Introduces side load onto the boom
| | | | | |
,When is the only time the outrigger beams should be less than fully
| | | | | | | | | | | | |
extended? - CORRECT 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? - CORRECT ANSWER✔✔-separate the load hoist lines.
| | | | | | | |
Eccentric main boom tip reeving causes which of the following: -
| | | | | | | | | | |
CORRECT 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 - CORRECT 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 - CORRECT 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 - CORRECT 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
| | | | | | | | | |
c. secured to the outriggers cylinder
| | | | | |
d. secured to the mats - CORRECT 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
|
