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Mobile Crane Questions Test #2
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Mobile Crane Questions Test #2
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Mobile Crane Questions Test #2When making a multiple crane lift it is important for the operator to understand that: - CORRECT
ANSWER : 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 ANSWER : Increase.
Most crane manufacturers reduce load capacity for duty-cycle operations because: - CORRECT
ANSWER : Side-loading forces may occur.
On whose recommendations should preventative maintenance program be set-up: - CORRECT
ANSWER : C rane manufacturer.
What is the standard rope used on most cranes? - CORRECT ANSWER : Right regular lay.
The proper way to calibrate a boom angle indicator is: - CORRECT ANSWER : Using a level, raise the
boom horizontal and set the indicator at 0º.
The red area of a instrument gauge means: - CORRECT ANSWER : A dangerous condition exists.
The best way to keep people from being injured from the counterweight of
crane is to: - CORRECT ANSWER : 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 ANSWER : They could cause a backward stability problem.
What is the first thing an operator should do before going under a low pipe rack? - CORRECT ANSWER
: Post a signal person to check clearance.
, When working on outriggers, the only time they should be less than fully extended is when: - CORRECT
ANSWER : There is a load chart for this operation.
When lifting loads from the water, the operator should be aware that: - CORRECT ANSWER : 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 ANSWER :
Boom length indicator.
When working on rubber, cranes are rated at what percentage of tipping? - CORRECT ANSWER : 75%
When using cable or nylon spreaders it is important to remember: - CORRECT ANSWER : The lower the
spreader angle to the horizontal, the greater the tension.
Backward stability of a crane is tested with: - CORRECT ANSWER : 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 ANSWER : Use the next longer or shorter length (the lower capacity).
When spinning the load presents a danger, the operator should: - CORRECT ANSWER : 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 ANSWER : 15,100.
Parts of line means: - CORRECT ANSWER : 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 ANSWER :
Gross capacity.
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