What is the significance of the scale readings on the instruments of most permanent switchboard installations being graduated to include the voltage and current transformer multipliers?
What will be an ideal response?
As a result of the scale readings on the instruments being graduated in this way, any error made by the switchboard operator in applying instrument multipliers is automatically eliminated.
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Answer the following statement(s) true (T) or false (F)
1. If two phases of the supply to a three-phase induction motor are interchanged, the motor will stop. 2. The sensing network continuously monitors the motor line currents. 3. A built-in delay of five cycles prevents nuisance dropouts caused by fluctuating line voltages. 4. Motor protector modules feature phase forward. 5. Motor protector modules feature instantaneous fault protection.
The ratio of 
? : 
is equivalent to to the ratio:
A. ?2 : 0.111 B. ?2 : 9 C. ?14 : 63 D. ?18 : 49
Steel pipe is threaded based on a standardized set of dimensions called the
A. Steel Pipe Threading System B. National Pipe Thread Taper C. Steel Pipe Thread Taper D. National Pipe Threading System
A transformer has a turns ratio of 1:3. The primary voltage is 120 V. What is the secondary voltage?
A. 40 V B. 84 V C. 240 V D. 360 V