Voltage is sometime referred to as emf. What does emf stand for?
a. Electromagnetic frequency
b. Electromotive frequency
c. Electromagnetic force
d. Electromotive force
d. Electromotive force
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Answer the following statement(s) true (T) or false (F)
1. Line diagrams include all of the devices in the system and show the physical relationships between the devices. 2. The control circuit consists of the main contacts and the overload heaters to the motor. 3. Three-wire control prevents the restarting of machinery when power is restored. 4. Motors draw half as much current on high voltages as they do on low voltages. 5. Throttle valves and narrow pipes can waste huge amounts of power.
238.237 - 190.30 x 0.372 + 32.9303 x 2 = ____. Round to two decimal places.
A. 190.38 B. 233.31 C. 233.30 D. 101.53
Brake tubing must be ________
A) Made of copper B) Able to withstand an internal pressure of 2000 psi C) Single-walled D) Double-walled
The P&ID symbol 
indicates that this instrument is field mounted.
Answer the following statement true (T) or false (F)