ISA Certified Automation Professional (CAP) program


Certified Automation Professionals (CAPs) are responsible for the direction, design, and deployment of systems and equipment for manufacturing and control systems.


The following questions come from the CAP study guide, Performance Domain V, Deployment.


Field installation and checkout and startup of the systems


CAP questions


1. Considering a 60 Hz power source, at what speed does a four-pole synchronous motor run?


 A. 1200 RPM


 B. 1800 RPM


 C. 2400 RPM


 D. 3600 RPM



2. When a large automation project makes significant changes to plant operations, it is BEST to perform operator training:


 A. Six months prior to the startup phase during control system development


 B. After acceptance testing and prior to the startup phase


 C. During the startup phase after water batching


 D. After the startup phase is complete and the process has stabilized


CAP answers


1. The correct answer is B, 1800 revolutions per minute (RPM).


Synchronous speed in RPM = (two × frequency × 60) / (number of poles)


For a 60 Hz, four pole motor that would be = (two × 60 × 60) / four = 1800


Reference: Webb, Industrial Control Electronics, Merrill Publishing, 1990 



2. The correct answer is B, after acceptance testing and prior to the startup phase.


The best time to train operators is after acceptance testing and prior to startup. Ideally, you want to train the operators after the bulk of the changes have happened, but before they will need to implement the knowledge. This reduces confusion and also reduces the chance that training will exit operator memory. Training needs to occur before the startup phase because the operator would have to know something about the process before they could start up the plant. However, if training occurs too early, the operator will forget what he or she learned before having a chance to apply the knowledge.


Reference: Liptak, Instrument Engineers Handbook - Process Software and Digital Networks, Volume 3, ISA Press, 2002


For information about the CAP program, go to