National Commission for the
Certification of Crane Operators
Committed to Quality, Integrity, and Fairness in Testing since 1995



Written Exam - Sample Questions

The following are sample test questions typical of the style and content of the questions used in the CCO Signalperson Written Examinations. They are not actual test questions, nor do they attempt to address all of the areas of knowledge tested on the CCO certification examination. Response to these questions is not necessarily an indication of performance on the CCO examinations.

If you’d like to submit questions to NCCCO, click here.

1. What is the purpose of an anti-two-block device?

(A) Prevent contact between the load block and the boom point.
(B) Shut down all crane functions.
(C) Prevent contact between the load block and the auxiliary ball.
(D) Prevent boom hoist-up function.

2. With the boom fully retracted, which series of standard ASME B30.5 hand signals would be required to move the hook from Position #1 to Position #2?

question 2

(A) Hoist, stop, extend the boom, stop, lower the hook, stop
(B) Swing right, stop, lower the boom, stop, lower the hook, stop
(C) Extend the boom, stop, lower the boom, stop, lower the hook, stop
(D) Hoist, stop, lower the boom, stop, lower the hook, stop

3. When signaling a tower crane which of the following is most reliable?

(A) 2-way radio.
(B) hard wire intercom.
(C) standard hand signals.
(D) hands-free cell phone.

4. According to OSHA 1926 Subpart CC, which hand signals must be used to signal operators?

(A) Signals promulgated by OSHA.
(B) Signals described on a signal card.
(C) Signals prescribed by the applicable ANSI standard.
(D) Signals taught in an applicable training class.

5. What is the signalperson directing the crane operator to do? 


(A) Travel
(B) Lower the boom and raise the load
(C) Lower the load
(D) Lower the boom

6. Which of the following describes the standard ASME B30.5 hand signal to lower the hook?

(A) With arm extended downward, forefinger pointing down, move hand in small horizontal circle.
(B) Arm extended, fingers closed, thumb pointing downward.
(C) With arm extended, thumb pointing down, flex fingers in and out as long as load movement is desired.
(D) One fist in front of chest, thumb pointing outward and heel of fist tapping chest.

Answer Key