When you increase the supply voltage to a permanent magnet dc motor, the no-load speed
A. decreases
B. remains the same
C. increases
Answer: C
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You may use a steel file instead of an emery board to:
What will be an ideal response?
The downward movement of the piston in the cylinder creates _____ above the piston.
A. a vacuum B. high pressure C. atmospheric pressure D. work
Answer the following statement(s) true (T) or false (F)
1. Light-emitting diodes (LEDs) are used as stop lights in many types of equipment. 2. Light-emitting diodes can be tested in a manner similar to that of testing a junction diode. 3. The case of most LEDs will have a flat side that is located closer to the anode lead. 4. When used in a circuit, the LED generally operates with a current of about 20 mA or less. 5. Photodiodes can be used as photovoltaic devices.
Back rakes should be ground on the tool:
A) When the toolholder is of the straight type without a built in back rake B) At the angle given in Table 1 for turning various metals C) At the same time the side rake is ground D) All of the above