M9.8 Cat B

The SHEL model of human factors takes into account.

• Software, hardware, environment and liveware.

• Software, hardware, efficiency and liveware.

• Software, hardware, environment and location.

What part of the SHEL model would the writing and interpretation of maintenance manuals fit into?

• Hardware

• Software

• Environment

The 'error chain' theory refers to

• a chain of errors within an organizations can be investigated, and similar errors prevented by determining a common link between them

• a company is only as good as its weakest employee or employees, and removal of that/those employee from the chain should prevent errors.

• errors are caused by a chain of linked events, and the breaking of one link in the chain will prevent the error

What part of the SHEL model would the aircraft design fit into?

• Liveware

• Hardware

• Environment

Which part of the SHEL model is most difficult to protect from errors by 'designing out' or to 'work around'?

• Liveware

• Software

• Environment

A violation in an aircraft maintenance procedure

• is usually carried out with the best intentions from a genuine desire to 'get the job done'

• is always considered an act of vandalism or sabotage

• is always carried out to satisfy some personal need, often unrelated to the actual task

Which type of human error is easiest to correct?

• Constant error

• Reversible error

• Variable error

In the 'slips, lapses and mistakes' definition of errors, forgetting to replace an engine cowling would be considered a

• mistake

• lapse

• slip

In the 'slips, lapses and mistakes' definition of errors, a mistake would typically occur at the

• storage (memory) stage

• execution stage

• planning stage

On a task that is complex, an engineer uses his own procedures due to pressure. This is legally termed

• modification

• initiative

• violation