Communication, Documentation, and Interpersonal Skills
What the exam tests
This domain tests radio and hand-signal protocol, the records a heavy equipment operator owns, and how you handle instruction and conflict on a busy site.
Core rules and concepts
- Radio: identify yourself and your machine, keep transmissions short, acknowledge instructions by repeating them back, and move to a clear channel for critical lifts. Never assume a message was received because you sent it.
- Hand signals: one designated signaler in clear view, and anyone may give a stop signal. Know the standard signals for stop, raise and lower, travel, and swing, and agree on them in the pre-job talk.
- Line of sight: if you cannot see the spotter or the trench bottom, stop and get a signaler. Mirrors and cameras have blind spots, so walk the swing area before moving.
- Documentation you own: daily inspection reports, machine hours and fuel sheets, load or haul tickets, site diaries, field-level risk assessments, tailgate talk sign-off, near-miss and incident reports, and hours-of-service logs where the National Safety Code applies.
- Write records that are factual, legible, dated and contemporaneous: what, where, when, who, and what action was taken. Avoid opinion and blame.
- Interpersonal: give clear, specific instructions, confirm understanding, and raise unsafe acts directly and calmly. Escalate to the supervisor when a crew will not clear the swing zone.
Worked example
A labourer walks into the excavator swing radius while you are loading a truck. Reasoning: stop the machine first, then communicate, using the horn and radio, then a direct conversation with the worker and the supervisor. Document it as a near miss: time, location, what the worker was doing, the control you applied, and the corrective action agreed, such as barricading the swing zone and briefing the crew. Facts only, with no commentary on the worker competence.
Traps that cost marks
- Reporting hours or production you did not verify.
- Writing that a worker was careless instead of describing the behaviour.
- Relying on a spotter who is out of your line of sight.
- Leaving the daily inspection blank because nothing was wrong.
- Failing to record a verbal instruction you were given.