Which one of the following statements on PLC sequencers is NOT true?
A) PLC sequencers change the output sequence bit pattern based on a comparison of an input word with stored bit patterns in sequencer registers.
B) Sequencer instructions can be used individually or in pairs.
C) Sequencer instructions require special sequencer modules.
D) The basic PLC sequencer function provides the capability to program many steps and provide multiple outputs.
C
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Briefly explain why a DC compound motor would be chosen for a particular application over a series motor or a shunt motor.
What will be an ideal response?
Theodore Roosevelt is probably most accurately described as a(n)
A. conservative in progressive clothing. B. near-socialist. C. middle-of-the-road reformer. D. champion trustbuster. E. political elitist.
If a 4.7 k?, 5.6 k? and 10 k? resistor are in series, which resistor drops the most voltage?
A) the 5.6 k? resistor B) the 10 k? resistor C) the 4.7 k? resistor D) That can't be determined from the given information.
In general, the first step in troubleshooting a pump is to ________
A) inspect the pump installation for any leaks B) verify that all the mounting bolts are tight C) inspect the belts and pulleys on the pumps D) inspect for excessive buildup of dirt and debris