Download 60Apretest - De Anza College

1. An ampere is a measure of:
a. Voltage
b. Resistance
c. Current flow
d. Difference in potential
2. A break or interruption in an electrical circuit is:
a. An open
b. A short
c. A ground
d. None of the above
3. The amperage in a series circuit is:
a. The same throughout the entire circuit
b. Different depending on the number of loads
c. Sometimes the same depending on then number of loads
d. Never the same anywhere in the circuit
4. A short to ground causes:
a. An increase in circuit resistance
b. Voltage to increase
c. Current flow to increase
d. Current flow to decrease
5. Three lamps are connected in parallel. What would happen if one lamp burns out?
a. The other 2 lamps would go out
b. Current flow would increase through the good lamps
c. Total circuit resistance would go up
d. Voltage at the other 2 lamps would increase
6. The sum of voltage drops in a series circuit equals the:
a. Voltage across the largest load
b. Voltage across the smallest load
c. Source voltage
d. Shunted circuit voltage
7. The test shown is used for measuring:
a. Battery current drain
b. Battery open circuit voltage
c. Ground circuit voltage drop
d. Cable resistance
8. When current flow is below specs, one possible problem is a:
a. High voltage fault
b. Low resistance fault
c. High resistance fault
d. None of the above
9. The circuit that allows only one path for current flow is:
a. Series circuit
b. Parallel circuit
c. An integrated circuit
d. All of the above
10. What circuit does the figure shown illustrate?
a. A series circuit
b. A parallel circuit
c. An integrated circuit
d. None of the above
11. What circuit does this figure shown illustrate?
a. A series circuit
b. A parallel circuit
c. An integrated circuit
d. None of the above
12. A measure of ‘infinite ohms’ on an ohmmeter means the circuit:
a. Is open
b. Has no resistance
c. Is in operation
d. Is complete
13. In the figure shown, if R1 & R2 have the
same resistance, how much voltage is applied
to each bulb?
a. It depends on the current
b. One-half the source voltage
c. Twice the source voltage
d. The source voltage
14. When using an ammeter to measure
current:
a. Open the circuit an connect the meter in series between the two ends
b. Open the circuit at the positive and negative terminals of the battery
c. Connect the meter across the battery or load
d. Open the circuit at one point an connect the meter to one end
15. If a circuit has 12 volts and 4 amps of current flowing, what will the resistance be:
a. .33 ohms
b. 3 ohms
c. 12 ohms
d. 48 ohms
16. A semiconductor device that will allow current to flow freely in one direction and not the
other is a:
a. Transistor
b. Diode
c. Vacuum tube
d. Integrated circuit
17. The electrical meter that should be connected in parallel with a ‘live’ circuit is:
a. A hertz meter only
b. An ohmmeter only
c. A voltmeter only
d. A hertz and ohmmeter
18. The electrical meter that should be connected in series with a ‘live’ circuit is:
a. An ammeter
b. An ohmmeter
c. A voltmeter
d. Lab scope
19. In a series circuit, all of the following are true, except:
a. The current is the same throughout the entire circuit
b. There is a voltage drop across each resistance (load)
c. The sum of all the voltage drops is equal to the source voltage
d. Total circuit resistance is less than the smallest resistance
20. The electrical value ‘kilo’ is equal to:
a. 1,000,000
b. 1,000
c. 0.001
d. 0.000001
21. The electrical value ‘meg’ is equal to:
a. 1,000,000
b. 1,000
c. 0.001
d. 0.000001
22. The electrical value ‘milli’ is equal to:
a. 1,000,000
b. 1,000
c. 0.001
d. 0.000001
23. Convert 35 millivolts to volts:
a. .035
b. .35
c. 3.5
d. 35