Electrical Iti Instructor Online Test 1
- 1.A resistor is connected across a 50 V source. What is the current in the resistor if the color code is red, orange, orange, silver?
- A.
2 mA
- B.
2.2 mA
- C.
214 mA
- D.
21.4 mA
- 2.
How much voltage is needed to produce 2.5 A of current through a 200 resistor?- A.
50 V
- B.
500 V
- C.
80 V
- D.
8 V
- 3.Twelve volts are applied across a resistor. A current of 3 mA is measured. What is the value of the resistor?
- A.
4
![Electrical Iti Instructor Online Test 1 - Quiz]()
- B.
400
![Electrical Iti Instructor Online Test 1 - Quiz]()
- C.
4 k
![Electrical Iti Instructor Online Test 1 - Quiz]()
- D.
4.4
![Electrical Iti Instructor Online Test 1 - Quiz]()
- 4.When a fourth resistor is connected in series with three resistors, the total resistance
- A.
Increases by one-fourth
- B.
Increases
- C.
Decreases
- D.
Remains the same
- 5.The total power in a certain circuit is 12 W. Each of the four equal-value series resistors making up the circuit dissipates
- A.
12 W
- B.
48 W
- C.
3 W
- D.
8 W
- 6.
Three 680 resistors are connected in series with a 470 V source. Current in the circuit is
- A.
69 mA
- B.
230 mA
- C.
23 mA
- D.
690 mA
- 7.If a 6 V and a 9 V source are connected series aiding, the total voltage is
- A.
6 V
- B.
8 V
- C.
3 V
- D.
15 V
- 8.
A certain Wheatstone bridge has the following resistor values: R1 = 10 k, R2 = 720 , and R4 = 2.4 k. The unknown resistance is
- A.
24
![Electrical Iti Instructor Online Test 1 - Quiz]()
- B.
2.4
![Electrical Iti Instructor Online Test 1 - Quiz]()
- C.
300
![Electrical Iti Instructor Online Test 1 - Quiz]()
- D.
3,000
![Electrical Iti Instructor Online Test 1 - Quiz]()
- 9.The branch current method uses
- A.
Kirchhoff's voltage and current laws
- B.
Thevenin's theorem and Ohm's law
- C.
Kirchhoff's current law and Ohm's law
- D.
The superposition theorem and Thevenin's theorem
- 10.
How many degrees are there in /3 rad?
- A.
6°
- B.
60°
- C.
180°
- D.
270
- 11.To produce an 800 Hz sine wave, a four-pole generator must be operated at
- A.
200 rps
- B.
400 rps
- C.
800 rps
- D.
1,600 rps
- 12.If the peak of a sine wave is 13 V, the peak-to-peak value is
- A.
6.5 V
- B.
13 V
- C.
26 V
- D.
None of the above
- 13.
A signal with a 400 s period has a frequency of
- A.
250 Hz
- B.
2,500 Hz
- C.
25,000 Hz
- D.
400 Hz
- 14.A sawtooth wave has a period of 10 ms. Its frequency is
- A.
10 Hz
- B.
50 Hz
- C.
100 Hz
- D.
1000 Hz
- 15.A 2 mH, a 3.3 mH, and a 0.2 mH inductor are connected in series. The total inductance is
- A.
55 mH
- B.
Less than 0.2 mH
- C.
Less than 5.5 mH
- D.
5.5 mH
- 16.An ohmmeter is connected across an inductor and the pointer indicates zero ohms. The inductor is
- A.
Good
- B.
Open
- C.
Shorted
- D.
Partly shorted
- 17.The current through a 120 mH coil is changing at a rate of 150 mA/s. The voltage induced across the coil is
- A.
1.8 mV
- B.
18 mV
- C.
180 mV
- D.
1.25 mV
- 18.In a three-phase system, the voltages are separated by
- A.
45°
- B.
90°
- C.
120°
- D.
180°
- 19.In a three-phase system, when the loads are perfectly balanced, the neutral current is
- A.
Zero
- B.
One-third of maximum
- C.
Two-thirds of maximum
- D.
At maximum
- 20.In a balanced three-phase load, each phase has
- A.
An equal amount of power
- B.
One-third of total power
- C.
Two-thirds of total power
- D.
A power consumption equal to IL
![Electrical Iti Instructor Online Test 1 - Quiz]()
- 21.In a Y-connected circuit, between each line voltage and the nearest phase voltage, there is a phase angle of
- A.
0°
- B.
30°
- C.
60°
- D.
120°
- 22.The most common type of ac motor is the
- A.
Single-phase induction motor
- B.
Two-phase induction motor
- C.
Three-phase induction motor
- D.
Two-phase squirrel-cage motor
- 23.In Delta connected generator, all of the phase voltages are
- A.
Zero
- B.
Equal in magnitude
- C.
One-third of total
- D.
One-sixth of total
- 24.Materials with lots of free electrons are called
- A.
Conductors
- B.
Insulators
- C.
Semiconductors
- D.
Filters
- 25.The unit of electrical charge is the
- A.
Coulomb
- B.
Joule
- C.
Volt
- D.
Watt
Questions: 20 | Attempts: 2540 | Last updated: Jun 26, 2022
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