An npn BJT has the following values: VCC = +15 V, RC = 1.5 k?, RB = 47 k?, and hFE = 80 at IC = 10 mA. The minimum value of +Vin required to saturate the transistor is
A) 1.25 V B) 15 V C) 6.58 V D) 5.88 V
C
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Answer the following statement(s) true (T) or false (F)
1. By controlling the ohms supplied to the motor windings, a wide range of motor speeds can be obtained. 2. The essential features and parts of DC motors and generators are the same. 3. The direction of armature rotation of a DC motor depends on the direction of the current in the field and armature circuits. 4. Normal or base speed for a DC motor is obtained by connecting full voltage to both the armature and shunt field. 5. Three factors limit the current taken by the armature from a DC source.
Wayne replaced the metal roof on his equipment building. The metal roofing and material cost $5,154 and the labor cost $3,675. He took out a loan to cover the cost at 6.5 percent for 9 months.
a. What was the amount of the loan? b. What was the interest? c. What was the amount repaid?
Technician A says that federal law requires all vehicles to be equipped with collapsible steering columns. Technician B says that a hammer can be used to install a steering wheel onto the steering shaft. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
Service bulletins are only marketing tools for equipment suppliers.
Answer the following statement true (T) or false (F)