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Each quiz has 10 multiple-choice questions.

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A transition-condition is

all the logical functions associated to each step

always true

all the logical functions associated to each transition

all the logical functions associated to each step and each transition

The steps skip is a particular case of …

AND-divergence

OR-divergence

AND-convergence

OR-convergence

By Grafcet evolution rule number 4 several transitions which can be simultaneously cleared…

are cleared sequentially

are cleared simultaneously

just one is cleared

are not cleared

In Gracet when an action D is defined as D:=1, it means that that action stops being executed when the associated step is deactivated.

True

False

A pit step has only a transition immediate preceding.

True

False

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

True

False

How many transitions can a pit step have immediate preceding?

None

Two

One

Three or more

GRAFCET abbreviation derives from

“GRAphe de Fonctionement Commande Étape-Transition”

“GRAphe Functionnel de Commande Étape-Transition”

“Graphe de AFCET”

“GRAphe de AF Commande Étape-Transition”

The OR divergence is represented by an horizontal line with one immediate preceding connection and

three connections immediate succeeding

one connection immediate succeeding

two connections immediate succeeding

two or more connections immediate succeeding

Several steps can be directly linked to a immediate succeeding transition through:

AND-junction

structural parallelism

sequence selection

AND-convergence

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

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