EE PREBOARDS 2
EE Preboards 2: Electrical Engineering Knowledge Check
Test your knowledge of electrical engineering concepts with our EE Preboards 2 quiz! This comprehensive quiz includes 25 multiple-choice questions designed to challenge your understanding of various topics in the field.
Whether you're a student preparing for exams or a professional seeking to refresh your knowledge, this quiz is perfect for you!
- 25 Engaging Questions
- Multiple Choice Format
- Instant Scoring
In air blast circuit breakers, the pressure of air is of the order of ___.
20 to 30 kg/sq.cm
3 to 5 kg/sq.cm
100 mmHg
1 kg/sq.cm
In kitchens, pantries, breakfast rooms, dining rooms, and the likes, a receptacle outlet shall be installed at each wall countertop and work surface that is ___ mm or wider. Receptacle outlets shall be installed so that no point along the wall line is more than ___ mm measured horizontally from a receptacle outlet in that space.
450,600
450,300
300,600
300,450
What is an electron volt?
The energy gained by an electron in moving through a potential difference of 1 volt.
The energy needed to move an electron through 1 meter in any electric field.
The force acting on an electron in a field of 1 N/C.
The force required to move an electron 1 meter.
Which of the following statement is CORRECT concerning electric field?
A charged point particle released from the rest moves along a field line.
Electric field point away from a negatively charged particle.
Electric field lines may cross.
Electric fields are closed together where the field is large.
Transistors act like a diode and _____.
Resistance
Voltage source
Current source
Power supply
Modulation is done at _____.
Channel
Receiver
Transmitter
Antenna
The direction of induced EMF can be found by ______.
Kirchhoff`s Law
Fleming`s Right Hand Rule
Fleming`s Left Hand Rule
Lenz`s Law
A relay that functions on a given value of AC Undervoltage.
21
27
23
25
For precision work, the illumination level required is of order of
200 – 400 lumen/m²
50 – 100 lumen/m²
10 – 25 lumen/m²
500 – 1000 lumen/m²
A system response is given as c(t) = 12 – 3e^-7t. What is the forced response?
12
Both 12 and -3
-3
-7
To reverse the direction of rotation of a three-phase induction motor, it is necessary to:
Increase the resistance of the rotor circuit
Interchange all the three-line connections
Reverse the polarity of the rotor circuit
Interchange any two of the three-line connections
What is the rms value of an AC current?
That steady current that will charge a battery at the same rate with the actual current
The steady current that produces the same rate of heating in a resistor as the actual current.
Its average value.
Its peak value.
In a dwelling unit, floor receptacle/outlets shall not be counted as part of the required receptacle outlets unless located within ____ mm of the wall.
450
1800
600
1600
In the solution of load flow equation, Newton-Raphson (NR) method is superior to the Gauss-Seidel (GS) method, because the:
Number of iterations required is not independent of the size of the system in the NR method
Convergence characteristic of the NR methods are not affected by selection of slack bus.
Time taken to perform one iteration in the NR method is less compared to the time taken in GS method.
Number of iterations required on the NR is more than compared to that in the GS method.
An alternator running in parallel with the other alternators all having automatic voltage regulators is to be taken off the bus. The usual procedure before opening the switch is to ______.
Reduce alternator excitation
Increase alternator excitation
Do nothing
Reduce the power fed to the prime mover
For two alternators operating in parallel, if the load shared by one of the alternators is to be increased, the field excitation is ________.
To be kept constant but input torque should be increased
To be kept constant but input torque should be decreased
To be strengthened keeping input torque the same
To be weakened keeping input torque the same
The breakdown mechanism in a lightly doped p-n junction under reverse biased condition is called:
Zener breakdown
Breakdown by tunnelling
High voltage breakdown
Avalanche breakdown
Which of the following is not a method of measuring the slip of an induction motor?
Stroboscopic method
Measurement of rotor frequency
Magnetizing method
Actual measurement of rotor speed
Which of the following is not a standard distribution voltage?
6.24 kV
11 kV
16 kV
13.8 kV
What type of front must be for panelboard enclosures?
Live front
Gray-colored front with yellow stripes
Dead front
Gray-colored front
Which of the following AC device is used to measure the angle between the voltage and its current?
Power factor meter
Reactive meter
Demand meter
Phase angle meter
When is the transposition of conductors in a transmission line done?
When ACSR conductor is used in transmission line
When a telephone line runs parallel to the power line
When the conductors are spaced equilaterally
When the conductors are not equally spaced
What does IEMOP stand for?
Independent Electricity Market Operator of the Philippines
Integrated Energy Market Operator of the Philippines
Integrated Electricity Market Operator of the Philippines
Independent Energy Market Operator of the Philippines
The thickness of insulation provided on the conductor in the cable depends on which among the following factors?
Current to be carried
Power to be carried
Operating voltage
Power factor
Two particles with charges Q and –Q are fixed at the vertices of an equilateral triangle with sides of length α If k = 1/4πє₀, the work required to move a particle with charge q from the other vertex to the center of the line joining the fixed particles is:
KQq/α
0
2kQq/α
KQq/α²
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