The term "Superstructure or Upper works" refers to the area of the crane: - ANSWER Above the swing circle
A crane must be level within _______% for the load chart ratings to be valid? - ANSWER 1%
On what principle is crane stability based? - ANSWER Leverage
What would be the effect of movi...
The term "Superstructure or Upper works" refers to the area of the crane: -
ANSWER Above the swing circle
A crane must be level within _______% for the load chart ratings to be valid? -
ANSWER 1%
On what principle is crane stability based? - ANSWER Leverage
What would be the effect of moving the tipping axis closer to the cranes center of
gravity? - ANSWER Reduced stability
Which of the following matches the appropriate load chart to a particular crane? -
ANSWER Serial number
,When the boom angle falls between the capacities listed in the load chart use the
gross capacity for the - ANSWER Lower boom angle
When load charts are between the values listed in the load chart, the value that
must be used is the: - ANSWER Lower at a longer radius
A load moment indicator (LMI) is a computer installed on cranes designed to:
provide the operator with information regarding the boom length, boom angle,
boom tip height, working radius, rated load and a total calculated weight being
lifted by the crane. The LMI also warns an operator when an overloading situation
is about to occur. - ANSWER True
. A crane operator plans to lift a gross load that weighs 26,300 Ibs. Based solely on
the line pull of the crane base 6,000 Ibs. what are the minimum parts of line
required to — make the lift? - ANSWER Five
Backward stability on a truck mounted crane could be dangerous when the crane
is working on rubber, boom angle, minimum boom length: - ANSWER Over the
side at a minimum radius
Hydraulic cranes shall be equipped with holding valves to prevent boom lowering
in the event of - ANSWER Hydraulic Failure
What is the sum of the following deductions? Block = 1,350 Ibs; Rigging = 55 Ibs;
Lifting beams = 200Ibs; - ANSWER 1,605 lbs.
What is the minimum number of wraps required by OSHA to remain on load hoist
drums? - ANSWER 2 wraps
, It is important to know when lubricating wire rope that the lubricant must: -
ANSWER Not hinder visual inspection
When replacing the hoist line on a crane, how do you determine the size or type
of wire rope? - ANSWER Use manufacture's operator's manual or load chart
On running ropes showing any evidence of heat damage, or wear of 1/3 of original
individual wires you must: - ANSWER Remove the rope from service
The most commonly used rope for the hoist lines is right regular lay (RRL). How
many random wires be remove a RRL wire from service? - ANSWER 6 in one lay or
3 in one strand in one lay
Breaking strength divided by the design (safety) factor equals: - ANSWER Safe
working load
When retracting the boom on a telescopic boom crane: - ANSWER The hook and
load decrease their height off the ground
A durable rating chart with legible letters and figures shall be provided with each
crane accessible to: - ANSWER The operator at the controls
The lifting capacities listed in the load chart assume that: - ANSWER The lift is to
be performed under ideal conditions
A "rough terrain" crane set up on outriggers that is based on 85% tipping should
have the tires: - ANSWER Off the supporting surface
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