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Mobile Crane Questions Test #2 – Q&A 100% Correct
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Mobile Crane Questions Test #2 – Q&A 100% CorrectWhen making a multiple crane lift it is important for the operator to
understand that: Correct Ans - The weight may increase if the other
crane lands the load.
If a crane is not set-up level and the operator swings a load from the high
side, the load radius will: Correct Ans - Increase.
Most crane manufacturers reduce load capacity for duty-cycle operations
because: Correct Ans - Side-loading forces may occur.
On whose recommendations should preventative maintenance program be
set-up: Correct Ans - C rane manufacturer.
What is the standard rope used on most cranes? Correct Ans - Right
regular lay.
The proper way to calibrate a boom angle indicator is: Correct Ans -
Using a level, raise the boom horizontal and set the indicator at 0º.
The red area of a instrument gauge means: Correct Ans - A
dangerous condition exists.
The best way to keep people from being injured from the counterweight of
crane is to: Correct Ans - Fence or barricade the tail swing area of
the crane.
Only approved attachments or extra counterweights made by the
manufacturer should be placed on the rear of the crane because:
Correct Ans - They could cause a backward stability problem.
What is the first thing an operator should do before going under a low pipe
rack? Correct Ans - Post a signal person to check clearance.
When working on outriggers, the only time they should be less than fully
extended is when: Correct Ans - There is a load chart for this
operation.
, When lifting loads from the water, the operator should be aware that:
Correct Ans - The load will increase when you pick the load from the
water.
What is required to be on a hydraulic crane in order for it to lift a
manbasket? Correct Ans - Boom length indicator.
When working on rubber, cranes are rated at what percentage of tipping?
Correct Ans - 75%
When using cable or nylon spreaders it is important to remember:
Correct Ans - The lower the spreader angle to the horizontal, the
greater the tension.
Backward stability of a crane is tested with: Correct Ans - Basic
boom at maximum angle with no load.
If not listed in the load/capacity charts for the hydraulic crane and you are
in between boom lengths, you should:: Correct Ans - Use the next
longer or shorter length (the lower capacity).
When spinning the load presents a danger, the operator should:
Correct Ans - Use a tagline.
The jib capacity is 8 tons and the ball weight 900 lbs. What is the heaviest
net load that can be lifted safely? Correct Ans - 15,100.
Parts of line means: Correct Ans - The number of lines running
through the load block.
If a jib is erected but not being used, it is treated as a deduction from the
cranes: Correct Ans - Gross capacity.
What is the maximum number of broken wires acceptable before
replacement on a standing wire rope? (In areas beyond end connections)
Correct Ans - 2.
What are most jib capacities based on? Correct Ans - Structural.
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