National Commission for the Certification of
Crane Operators Category 3 Non-Cab
Operated Crane Safety Exam Questions and
Answers
What may cause the bridge to skew - ANSWER>>Wheel slippage on one side only
because of a slippery track, or a heavy load suspended from one end of the
bridge.
What is two-blocking and why is two-blocking dangerous? - ANSWER>>Two-
blocking occurs when the hook block comes into contact with the upper sheave
block during hoisting of the hook. It is dangerous because it could result in
damage to the crane, parting of the hoist lines, and dropping the load.
What is the formula for determining the area of a triangular shaped object? -
ANSWER>>Base x Height divided by 2
When is it permissible for an operator to leave the controls of a crane while a load
is suspended from the hook? - ANSWER>>The operator shall remain at the
controls at all times while a load is suspended from the hook.
Regardless of the method of communication used, all crane signals must be -
ANSWER>>Clear
What is the weight of a 24 square foot, 2 inch thick aluminum plate with a unit
weight of 15 lbs. per square foot of material per inch of thickness? -
ANSWER>>720lbs
, Synthetic web slings should NOT be used in areas where temperatures exceed
194 degrees Fahrenheit. - ANSWER>>True
Which of the following identifies the two categories of crane lifts? -
ANSWER>>Complex and Non-Complex
What is inching? - ANSWER>>Performing a motion very slowly, a little at a time
While performing a pre-use check, the operator must check the wire rope system
for all of the following except? - ANSWER>>Size and grade of wire rope
Crane operators at naval activities may be required to operate various types of
cranes for which they hold a license. Which of the following can best assure
operator proficiency and safety? - ANSWER>>Be familiarized by a qualified person
before operating the crane for the first time
What is the minimum amount of rope that shall be on a grooved drum and a
smooth drum? - ANSWER>>2 full wraps, 3 full wraps
Which of the following is used with a physical locking device placed at the energy
source? - ANSWER>>Lockout tag
Components that affect the safety and capability of the WHE by stopping or
limiting the operation when activated are - ANSWER>>Operational safety devices
When crane accidents happen, you must do all of the following except? -
ANSWER>>Continue to operate the crane until all lifts are completed
Components that provide protection for operation and maintenance personnel
working on or in the path of cranes. - ANSWER>>General Safety Devices
What signal may an operator obey from a person other than the designated signal
giver? - ANSWER>>Stop or Emergency Stop
Crane Operators Category 3 Non-Cab
Operated Crane Safety Exam Questions and
Answers
What may cause the bridge to skew - ANSWER>>Wheel slippage on one side only
because of a slippery track, or a heavy load suspended from one end of the
bridge.
What is two-blocking and why is two-blocking dangerous? - ANSWER>>Two-
blocking occurs when the hook block comes into contact with the upper sheave
block during hoisting of the hook. It is dangerous because it could result in
damage to the crane, parting of the hoist lines, and dropping the load.
What is the formula for determining the area of a triangular shaped object? -
ANSWER>>Base x Height divided by 2
When is it permissible for an operator to leave the controls of a crane while a load
is suspended from the hook? - ANSWER>>The operator shall remain at the
controls at all times while a load is suspended from the hook.
Regardless of the method of communication used, all crane signals must be -
ANSWER>>Clear
What is the weight of a 24 square foot, 2 inch thick aluminum plate with a unit
weight of 15 lbs. per square foot of material per inch of thickness? -
ANSWER>>720lbs
, Synthetic web slings should NOT be used in areas where temperatures exceed
194 degrees Fahrenheit. - ANSWER>>True
Which of the following identifies the two categories of crane lifts? -
ANSWER>>Complex and Non-Complex
What is inching? - ANSWER>>Performing a motion very slowly, a little at a time
While performing a pre-use check, the operator must check the wire rope system
for all of the following except? - ANSWER>>Size and grade of wire rope
Crane operators at naval activities may be required to operate various types of
cranes for which they hold a license. Which of the following can best assure
operator proficiency and safety? - ANSWER>>Be familiarized by a qualified person
before operating the crane for the first time
What is the minimum amount of rope that shall be on a grooved drum and a
smooth drum? - ANSWER>>2 full wraps, 3 full wraps
Which of the following is used with a physical locking device placed at the energy
source? - ANSWER>>Lockout tag
Components that affect the safety and capability of the WHE by stopping or
limiting the operation when activated are - ANSWER>>Operational safety devices
When crane accidents happen, you must do all of the following except? -
ANSWER>>Continue to operate the crane until all lifts are completed
Components that provide protection for operation and maintenance personnel
working on or in the path of cranes. - ANSWER>>General Safety Devices
What signal may an operator obey from a person other than the designated signal
giver? - ANSWER>>Stop or Emergency Stop
