Mobile Crane Questions Test #1
Where is the best location for leveling a crane? - CORRECT ANSWER : Upperworks.
When determining the gross load the best method is? - CORRECT ANSWER : Get an accurate load
weight and add the rigging.
By order of hitch strength, which is the correct answer? - CORRECT ANSWER : Basket, vertical, choker.
What is the primary purpose of using a jib? - CORRECT ANSWER : Increase height.
When taking a side strain on a boom, what concerns the operator most? - CORRECT ANSWER : Boom
damage.
You should always have how many wraps on a hoist drum? - CORRECT ANSWER : 2.
On a load chart, values above the load line mean: - CORRECT ANSWER : Capacities based on structural
competence.
The primary purpose for a rooster sheave or auxiliary boom point sheave is to: - CORRECT ANSWER :
Separate the hoist lines.
What is the proper procedure when using an insulating link or a boot near power lines? - CORRECT
ANSWER : Be sure to maintain the correct allowable distance from the lines.
When the number of layers of rope on a drum increases the:: - CORRECT ANSWER : Allowable line pull
increases.
, What is the minimum allowable distance from the crane and power-lines up to 50kV? - CORRECT
ANSWER : 10 ft.
The term "Upperworks" or "Superstructure" refers to the area of the crane: - CORRECT ANSWER :
Above the turntable.
Side-loading may be caused by: - CORRECT ANSWER : Starting or stopping the swing too rapidly.
What is the best procedure to follow when underground utilities may be present? - CORRECT ANSWER
: Contact local utility company.
Eccentric main boom tip reeving causes: - CORRECT ANSWER : Twisting of the boom.
How many randomly broken wires would be cause to remove a running wire rope from service -
CORRECT ANSWER : 6
When lifting personnel in a manbasket using 6 x 19 wire rope, the minimum safety factor is? - CORRECT
ANSWER : 7
What is the safety factor required when using non-rotating wire rope and lifting in a manbasket? -
CORRECT ANSWER : 10
Who has the responsibility for determining the correct weight of a load? - CORRECT ANSWER :
Supervisor
When working near powerlines when is a signal person required? - CORRECT ANSWER : When crane
moves within booms length of powerlines.
When an operator leaves the crane, he must first: - CORRECT ANSWER : Put the load on the ground
and put all dogs or pawls in.
Where is the best location for leveling a crane? - CORRECT ANSWER : Upperworks.
When determining the gross load the best method is? - CORRECT ANSWER : Get an accurate load
weight and add the rigging.
By order of hitch strength, which is the correct answer? - CORRECT ANSWER : Basket, vertical, choker.
What is the primary purpose of using a jib? - CORRECT ANSWER : Increase height.
When taking a side strain on a boom, what concerns the operator most? - CORRECT ANSWER : Boom
damage.
You should always have how many wraps on a hoist drum? - CORRECT ANSWER : 2.
On a load chart, values above the load line mean: - CORRECT ANSWER : Capacities based on structural
competence.
The primary purpose for a rooster sheave or auxiliary boom point sheave is to: - CORRECT ANSWER :
Separate the hoist lines.
What is the proper procedure when using an insulating link or a boot near power lines? - CORRECT
ANSWER : Be sure to maintain the correct allowable distance from the lines.
When the number of layers of rope on a drum increases the:: - CORRECT ANSWER : Allowable line pull
increases.
, What is the minimum allowable distance from the crane and power-lines up to 50kV? - CORRECT
ANSWER : 10 ft.
The term "Upperworks" or "Superstructure" refers to the area of the crane: - CORRECT ANSWER :
Above the turntable.
Side-loading may be caused by: - CORRECT ANSWER : Starting or stopping the swing too rapidly.
What is the best procedure to follow when underground utilities may be present? - CORRECT ANSWER
: Contact local utility company.
Eccentric main boom tip reeving causes: - CORRECT ANSWER : Twisting of the boom.
How many randomly broken wires would be cause to remove a running wire rope from service -
CORRECT ANSWER : 6
When lifting personnel in a manbasket using 6 x 19 wire rope, the minimum safety factor is? - CORRECT
ANSWER : 7
What is the safety factor required when using non-rotating wire rope and lifting in a manbasket? -
CORRECT ANSWER : 10
Who has the responsibility for determining the correct weight of a load? - CORRECT ANSWER :
Supervisor
When working near powerlines when is a signal person required? - CORRECT ANSWER : When crane
moves within booms length of powerlines.
When an operator leaves the crane, he must first: - CORRECT ANSWER : Put the load on the ground
and put all dogs or pawls in.
