ac/dc saca study guide exam guaranteed a+ actual
questions and answers, complete 100%
1. How many degrees apart are the phases of a balanced three phase system?: 120
2. What does an electrical schematic not show?: Physical connections
3. Resistance is measured in units of?: Ohms
4. What is the power formula?: P=IxE
5. What is power measured in?: Watts
6. What is the function of an inductor?: It opposes a change in current flow
7. A coil is a_________?: Output
8. Which of the following is an output?: Solenoid
9. What is the formula to solve for current?: I=E/R
10. When troubleshooting a circuit, what can be said if the total resistance of the parallel
circuit does not change when a branch is removed?: An open exists in the removed
branch
11. The unit for electromotive force (emf) is?: Volt
12. What is the relationship of the applied voltage across two electrical components in
parallel with each other?: They are the same
13. Which feature of a ground circuit creates a safe path for current?: Low resistance to
earth
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, 14. An ohmmeter is reading total circuit resistance reads 0 ohms when all branches are
connected and reads 200 ohms when a branch is disconnected.
What condition exists?: There is a short in the disconnected branch
15. A series circuit has a total of three resistors, 5 ohms, 3 ohms, and 16 ohms.
What is the Rt of this circuit?: 24 ohms
16. When testing an indicator light, one must first remove it from the circuit and place a
multimeter across its threaded area and base or input leads. What is the next step in
testing the indicator light?: Set the meter for resistance and check the reading
17. What is the secondary coil voltage of a transformer that has 120v supplied,
400 turns on the primary and 100 turns on the secondary?: 30v
18. A voltmeter is connected in a circuit by?: Placing the test leads in parallel with the circuit
device
19. To measure current in a current, how is the meter placed in the circuit?: In series with
the circuit or component
20. Which of the following is the formula for TR: TR=NP/NS
21. Which of the following is an immediate danger of unsecured electrical cords?: Trip
hazard
22. A series circuit has three resistors. The voltage measured across each resistor is
4vdc, 8vdc, and 12vdc. What is the Et of this circuit?: 24
23. When checking for voltage in a circuit, the test leads of the multimeter must be
placed in______with the circuit?: Parallel
24. How many seconds will it take in a RC circuit to completely charge if the
2/5
questions and answers, complete 100%
1. How many degrees apart are the phases of a balanced three phase system?: 120
2. What does an electrical schematic not show?: Physical connections
3. Resistance is measured in units of?: Ohms
4. What is the power formula?: P=IxE
5. What is power measured in?: Watts
6. What is the function of an inductor?: It opposes a change in current flow
7. A coil is a_________?: Output
8. Which of the following is an output?: Solenoid
9. What is the formula to solve for current?: I=E/R
10. When troubleshooting a circuit, what can be said if the total resistance of the parallel
circuit does not change when a branch is removed?: An open exists in the removed
branch
11. The unit for electromotive force (emf) is?: Volt
12. What is the relationship of the applied voltage across two electrical components in
parallel with each other?: They are the same
13. Which feature of a ground circuit creates a safe path for current?: Low resistance to
earth
1/5
, 14. An ohmmeter is reading total circuit resistance reads 0 ohms when all branches are
connected and reads 200 ohms when a branch is disconnected.
What condition exists?: There is a short in the disconnected branch
15. A series circuit has a total of three resistors, 5 ohms, 3 ohms, and 16 ohms.
What is the Rt of this circuit?: 24 ohms
16. When testing an indicator light, one must first remove it from the circuit and place a
multimeter across its threaded area and base or input leads. What is the next step in
testing the indicator light?: Set the meter for resistance and check the reading
17. What is the secondary coil voltage of a transformer that has 120v supplied,
400 turns on the primary and 100 turns on the secondary?: 30v
18. A voltmeter is connected in a circuit by?: Placing the test leads in parallel with the circuit
device
19. To measure current in a current, how is the meter placed in the circuit?: In series with
the circuit or component
20. Which of the following is the formula for TR: TR=NP/NS
21. Which of the following is an immediate danger of unsecured electrical cords?: Trip
hazard
22. A series circuit has three resistors. The voltage measured across each resistor is
4vdc, 8vdc, and 12vdc. What is the Et of this circuit?: 24
23. When checking for voltage in a circuit, the test leads of the multimeter must be
placed in______with the circuit?: Parallel
24. How many seconds will it take in a RC circuit to completely charge if the
2/5
