Online Electrical Engineering Test - Electrical Engineering Test 2

Instruction:

• This is a FREE online test. DO NOT pay money to anyone to attend this test.
• Total number of questions : 20.
• Time alloted : 30 minutes.
• Each question carry 1 mark, no negative marks.
• DO NOT refresh the page.
• All the best :-).

1.

When converting 7,000 nA to microamperes, the result is

A.
 0.007 µA
B.
 0.7 µA
C.
 700 µA
D.
 7 µA

2.

The quantity 3.3 × 103 is the same as

A.
 330
B.
 3,300
C.
 33,000
D.
 0.0033

3.

An ohmmeter is an instrument for measuring

A.
 current
B.
 voltage
C.
 resistance
D.
 wattage

4.

An open circuit is one that has a complete current path.

A.
 True
B.
 False

5.

An electric heater draws 3.5 A from a 110 V source. The resistance of the heating element is approximately

A.
 385
B.
 38.5
C.
 3.1
D.
 31

6.

If a 24 V and a 6 V battery are series opposing, the total voltage is

A.
 30 V
B.
 24 V
C.
 18 V
D.
 0 V

7.

Norton's equivalent current (IN) is an open-circuit current between two points in a circuit.

A.
 True
B.
 False

8.

The angular position of a phasor represents the angle of the sine wave with respect to a reference.

A.
 True
B.
 False

9.

A 0.01 F capacitor equals how many picofarads?

A.
 100 pF
B.
 1,000 pF
C.
 10,000 pF
D.
 100,000 pF

10.

Inductance is the property of an inductor that produces an opposition to any change in current.

A.
 True
B.
 False

11.

An ac circuit consists of a resistor and a capacitor. To increase the phase angle above 45°, the following condition must exist:

A.
 R = XC
B.
 R > XC
C.
 R < XC
D.
 R = 5XC

12.

An imaginary number is one that exists only in the mind of the mathematician.

A.
 True
B.
 False

13.

Referring to Problem 23, the true power is

A.
 68.6 mW
B.
 686 mW
C.
 564 mW
D.
 121.8 mW

14.

In a certain series resonant circuit, VC = 125 V, VL = 125 V, and VR = 40 V. The value of the source voltage is

A.
 125 V
B.
 250 V
C.
 290 V
D.
 40 V

15.

In applying the superposition theorem,

A.
 the sources are considered one at a time with all others replaced by their internal impedance
B.
 all sources are considered independently
C.
 all sources are considered simultaneously
D.
 the sources are considered one at a time with all others replaced by their internal resistance

16.

Referring to the given circuit, find ZTH for the part of the circuit that is external to RL.

A.
 12921.4°
B.
 43.768.6°
C.
 43.721.4°
D.
 12.968.6°

17.

In order to get maximum power transfer from a capacitive source, the load must

A.
 have a capacitive reactance equal to circuit resistance
B.
 have an impedance that is the complex conjugate of the source impedance
C.
 be as capacitive as it is inductive
D.
 none of the above

18.

In an electric circuit, the reaction of a circuit to a given pulse input is known as the pulse response.

A.
 True
B.
 False

19.

A three-phase -connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When I θa = 12 30° A, what are the polar expressions for the other phase currents?

A.
 I θb = 12 150° A, I θc = 12–90° A
B.
 I θb = 12120° A, I θc = 1230° A
C.
 I θb = 1230° A, I θc = 12120° A
D.
 I θb = 1290° A, I θc = 1290° A

20.

In a -connected generator, all of the phase voltages are

A.
 zero
B.
 equal in magnitude
C.
 one-third of total
D.
 one-sixth of total