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25 Cards in this Set
- Front
- Back
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The main advantage of a hardwired communication system is _____.
A. Low cost B. Portability C. Less radio interference D. Ease of use |
C. Less radio interference |
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What action is signaled by tapping your fist on your head, then using regular hand signals?
A. Use main hoist B. Lower C. Use whip line D. Raise boom and lower load |
A. Use main hoist |
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Which of the following is a mode of nonverbal communication ?
A. Buzzer B. Portable radio C. Bullhorn D. Hardwired radio |
A. Buzzer |
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When the signal person gives the dog everything signal, the operator is expected to _______.
A. Turn the machine B. Travel the machine C. Retract the boom services D. Make no machine movement |
D. Make no machine movement |
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If it is apparent that the crane operator gas misunderstood a hand signal, the signal person should ______.
A. Climb up on the cab and knock on the door B. Find a supervisor C. Signal the operator to stop D.get away from the crane as quickly as possible |
C. Signal the operator to stop |
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A one-handed signal that is give with the fist in front of the body and the thumb pointing toward the signalers body means _____.
A. Extend the boom B. Move the crane toward me C.swing the load toward me D. Extend the jib |
A. Extend the boom |
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When calculating the weight of the load, the rigging and related hardware should not be considered.
A. True B. False |
B. False |
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The most important rigging precaution is determining the weight of all loads before attempting to lift them
A. True B. False |
B. False |
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The correct time to determine weight loads for rigging is after the load has been lifted
A. True B. False |
B. False |
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When safe working loads are determined,they are based on_____ conditions.
A. Ideal B. Average C. Rare D. Worst-case |
A. Ideal |
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A ______ is used to allow controlled rotation of the load for position.
A. Tag line B. Equalizer beam C. Hoist-line D. Safe-load indicator |
A. Tag line |
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_______ lines are used when physical control of a load beyond the ability of the crane is required.
A. Lockout B. Tag C. Lead D. Plumb |
B. Tag |
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Tag lines are attached after the rigger verifies that the load is balanced
A. True B. False |
B. False |
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When using two or more slings on a load, the rigger must ensure that ______.
A. The sling angle is greater than 30 degrees relative to the horizontal B. All slings are made from the same material C. Only chain slings are used D. Only wire rope slings are used |
A. The sling angle is greater than 30 degrees relative to the horizontal |
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The minimum safe distance from power lines of up to 50,000 volts (or 50k) is _____
A. 10 B. 15 C. 20 D. 25 |
A. 10 |
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If a crane boom has come into contact with a power line, the operator should ______.
A. Immediately jump off the crane B. Stop and turn off the crane C. Try to back the crane away from the power line D. Find out if the line is energized |
C. Try to back the crane away from the power line |
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High winds and lightning , which pose danger to cranes, often arrive without warning..
A. True B. False |
A. True |
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The amount of injury caused by exposure to abnormally cold temperatures depends on all of the following except _____
A. Wind speed B. Length of exposure C. Temperature D. Altitude |
D. Altitude |
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When cranes are used to lift people, the lift capacity of the crane is ______ percent as a safety factor.
A.increased 10 B. Increased 20 C. Decreased 20 D. Decreased 50 |
D. Decreased 50 |
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Before a crane is used for a lift , it must be leveled to within ___ percent of grade.
A. One B. Two C. Five D. Ten |
A. One |
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The operating radius of a crane is ______.
A. The length of the boom plus the distance from the end of the boom to the ground B. The distance from the center line of rotation to the center of the load block C. Always the same regardless of the boom position D. The distance from the center line of rotation to the top of the boom or jib |
B. The distance from the center line of rotation to the center of the load block |
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When two slings positioned at a sling angle of 60 degrees are being used to lift a 1,000 pound load , what is the tension on each sling? Assume a sling angle load factor of 1.155
A. 577.5 pounds B. 652.5 pounds C. 777.5 pounds D. 1,000 pounds |
___ |
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Shoulderless eyebolts cannot be used for angled lifts.
A. True B. False |
A. True |
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Using the rule of thumb for sizing chocks, a 24-inch diameter pipe would require a chock that is _____ inches thick
A. 1.5 B. 2 C. 2.5 D. 3.5 |
A. 1.5 |
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The correct way to rig a valve is to ____.
A. Lift it by the hand wheel B. Run the choker through the valve body C. place a synthetic sling on each side of the valve body D. Bolt lifting eyes to the valve flanges |
C. Place a synthetic sling on each side of the valve body |
