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How-to

Each quiz has 10 multiple-choice questions.

Select the answer that considers correct.

Only after submit the quiz, the responses will be validated.

At the end of the quiz it is reported the result and the test summary.

A predicate is a logical expression with one or more variables.

True

False

A transition-condition…

is always true

can not be time-dependent

can be time-dependent

is always enabled

The steps skip is a particular case of …

AND-divergence

OR-divergence

AND-convergence

OR-convergence

When a transition is enabled and the associated condition is true, the transition is not cleared.

True

False

A transition-condition (receptivity) is every logical function associated to each

Step

Transition

Action

Structure

The selection of sequence(s) is used when it is desired that the Grafcet evolves:

through one sequence

through one (or more) sequence(s)

through several sequences

through none sequence

A macro-step is a representation of

a set of steps

the Grafcet state

all the logical conditions associated with the transitions

a succeeding steps and transitions

Grafcet evolution rule number 5 states that, when a step is simultaneously activated and deactivated it remains active!

True

False

The timed variables can be associated to…

steps or transitions

actions or transitions

transitions

steps

A pit transition can have one or more steps immediate preceding.

True

False

Universidade de Trás-os-Montes e Alto Douro Logotipo da UTAD

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