Automation System
What is proportional control?

The gain is independent of offset error.
None of these
All of these
The controller output varies continuously over a range
It has a discrete output for each error value

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Time proportioning control:

a and b above.
None of these
cannot use a TM990 micro¬computer
is less efficient than normal PID control
can be used on a PM550 programmable process controller

ANSWER DOWNLOAD EXAMIANS APP

Automation System
D/A (digital to analog) conversion:

has to be sampled at 1/2 the highest input frequency
both (b) and (c)
results in a binary code as the final output
None of these
must be fed through a filter to reproduce the original signal accurately

ANSWER DOWNLOAD EXAMIANS APP

Automation System
Today, programmable controllers:

can be cost effective even when replacing just a few relays
are relatively low cost compared with the original digital equipment available for industrial control
None of these
are more powerful then the first controllers on the market
All of these

ANSWER DOWNLOAD EXAMIANS APP