Concerning PERT and CPM

question 68

Multiple Choice

Concerning PERT and CPM:

• A)These are two different names for essentially the same technique.
• B)CPM tends to focus more on the critical path; PERT focuses on the parallel paths.
• C)PERT gives a clearer indication of activity slack, while CPM gives a better picture of path slack.
• D)Because of its recent discovery, much less is known about CPM than PERT.
• E)All of the above are true.

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Definitions:

Through-beam Sensor

A type of photoelectric sensor where the emitter and receiver are positioned opposite each other, detecting objects when the beam is interrupted.

Sensing Range

The distance within which a sensor can detect the presence of an object or a signal.

NC Pushbutton

A Normally Closed pushbutton switch that makes contact (closes) when at rest and breaks the circuit when pressed.

Ladder Logic

A programming language that represents electronic switching circuits; widely used in programming PLCs.