To conduct, the SCR must have the __________.
A. anode more positive than the cathode
B. cathode more negative than the anode
C. gate more positive than the cathode
D. all of the above
Answer: D
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In a wound rotor induction motor, resistance is connected to the slip rings by means of ____.
a. brush holders b. klixons c. carbon brushes d. external resistors
____________________ is the number of electrical cycles that occur in one second.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1. Torque is an essential component used in the calculation of the horsepower rating of a machine. 2. Horsepower is proportional to torque and speed. 3. Torque is the product of the effective length (l) of the torque arm in feet times the net force (F) on the scale in pounds. 4. Horsepower equals (2?xTorquexrpm) /3,300 5. Torque of a motor can be found with a revolutions counter and stopwatch, or a tachometer, or a calibrated stroboscopic light.
Which of the following pools contain the largest amount of the world's carbon?
A) soil B) atmosphere C) animals D) vegetation