In the United States, the common frequency is 50 Hz.
Answer the following statement true (T) or false (F)
False
Rationale: In the United States, the common frequency is 60 Hz.
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Blue-line prints are also known as:
a. blueprint b. diazo c. photocopy d. microfilm
Answer the following statement(s) true (T) or false (F)
1. For the gentle starting of large motors, a motor starter is used. 2. Four-terminal manual starting has three functions in common with three-terminal starting rheostats. 3. Four-terminal manual starting has three functions in common with three-terminal starting rheostats. 4. Series and cumulative compound motors are rarely used on cranes, elevators, machine tools, and other devices where the motor is under the direct control of an operator. 5. A contactor is a switch that is closed or opened by the magnetic pull of an energized relay coil.
The four outputs of a 7493 4-bit binary counter are Q0, Q1, Q2, Q3. Which modulus results if Q0 is tied to Clock 1 and Q2 and Q3 are tied to MR1 and MR2? (Assume input on Clock 0.)
A) MOD-6 B) MOD-12 C) MOD-10 D) MOD-11
In a parallel RLC circuit,at resonance the capacitive reactance (XC) and the inductive reactance (XL):
A) equal and oppose current flow. B) are moderate. C) add to each to cancel current flow. D) are minimum.