Describe the basic difference between a DC motor and a DC generator.
What will be an ideal response?
In a motor, the armature receives current from a power source. This creates the magnetic field that opposes the magnetic fields in the motor’s coils, which causes the armature to rotate. The armature in a DC generator is driven by the engine or other device. It is not magnetized and the windings simply rotate through the stationary magnetic field of the field windings. This induces an AC voltage in the conductors inside the armature.
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Using the formula V = ?r2h, find the volume of a cylinder with a diameter of 19 inches and a height of 27 inches, and round the answer to a whole number _____.
a. 467 cu in b. 786 cu in c. 4,326 cu in d. 7,655 cu in
The term MOST-Likely used to describe an event that occurs when the engine reaches operating temperature and the computer starts acting on information received from the O2 sensor is:
A. closed loop fuel control B. open loop fuel control C. ground fuel control D. filter fuel control
Which of the following is the proper sequence of engine strokes?
a. compression, power, intake, exhaust c. intake, compression, power, exhaust b. power, compression, intake, exhaust d. exhaust, compression, intake, power
Which of the following is (are) a reason(s) for using fillets and rounds in forging?
A. retention of the die B. to substantially reduce the life of the die C. increased corner strength D. both b and c E. none of the above