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Eletrical
General Test
| Question | Answer |
|---|---|
| The basis for transformer operation in the use of alternating current is mutual | inductance |
| In an N-P-N transistor application, the solid-state device is turned on when the | base is positive with respect to the emitter |
| Which symbol represents a variable resistor? | Resister with arrow through the middle |
| The voltage drop in a circuit of known resistance is dependent on | the amperage of the circuit |
| The purpose of providing a space underneath the plates in a lead acid battery's cell container is to | prevent sediment buildup from contacting the plates and causing a short circuit. |
| In a P-N-P transistor application, the solid-state device is turned on when the | base is negative with respect to the emitter |
| Forward biasing of a solid-state device will cause the device to | conduct |
| How can the state-of-charge of a nickel-cadmium battery be determined? | by a measured discharge |
| Which condition is an indication of improperly torqued cell link connections of a nickel-cadmium battery? | Heat or burn marks on the hardware. |
| The control valve switch must be placed in the neutral position when the landing gear is down to | prevent the warning horn from sounding when the throttles are closed. |
| What is the total capacitance of a circuit containing three capacitors with capacitances of .02 microfarad, .05 microfarad, and .10 microfarad, respectively? | .0125 uF |
| Convert farads to picofarads by: | multiplying farads by 10 to the power of 12 |
| Typical application for zener diodes is as | Voltage regulators |
| What is the basic unit of electrical quantity? | coulomb |
| Which of these will cause the resistance of a conductor to decrease? | Decrease the length or increase the cross-sectional area. |
| What will a voltmeter read if properly connected across a closed switch in a circuit with electrical power on? | zero voltage |
| The amount of electricity a capacitor can store is directly proportional to the | plate area and inversely proportional to the distance between the plates. |
| A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2-ohms resistance. The internal resistance of the battery in this instance is | 0.52 ohm |
| The potential difference between two conductors which are insulated from each other is measured in | volts |
| The correct way to connect a test voltmeter in a circuit is | in parallel with a unit |
| In an AC circuit, the effective voltage is | less than the maximum instantaneous voltage. |
| Convert farads to microfarads by | multiplying farads by 10 to the power of 6 |
| The working voltage of a capacitor in an AC circuit should be | at least 50 percent greater than the highest applied voltage. |
| When calculating power in a reactive or inductive AC circuit, the true power is | less than the apparent power |
| What happens to the current in a voltage step-up transformer with a ratio of 1 to 4? | The current is stepped down by a 1 to 4 ratio. |
| What does the letter Q symbolize when measuring electrical charge? | coulomb |
| Transfer of electric energy from one circuit to another without the aid of electrical connections | is called induction |
Created by:
mattpayne001