A potentiometer is a __________ feedback device.
A. position
B. velocity
C. both a and b
Answer: A
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Answer the following statements true (T) or false (F)
1 Newton’s third law of motion states that for every action, there is a lesser but similar reaction. 2 Labyrinth seals are single-layer seals used to allow small amounts of leakage inside the turbine. 3 AC motors are the most common type of motor used in the process industries due to their simplicity. 4 Variable speed motors allow for the rotation speed of the motor to be adjusted. 5 Synchronous motors are the most common type of AC motor.
During the early settlement of Quebec, the actions of Samuel de Champlain
A. illustrated a lack of French interest in developing political and economic relations with Indian tribes of the region. B. led to France's lasting alliance with the Iroquois tribes. C. were marked by tension and violence with the Hurons. D. included forging a pivotal alliance with the Hurons that inspired the lasting hatred of the Iroquois. E. angered the government of King Louis XIV of France.
Voltage signals (waveforms) that do not go below zero are called ________
A) DC coupled signals B) AC signals C) DC signals D) Pulse trains
Which one of the following statements for the Logix PLC tag addressing is true?
A) The names for input tags must have the word input included in the names. B) Virtual relays or memory bits cannot be addressed by tag names. C) Input and output tag names must be assigned to an input and output terminal before program can be executed.