Module 3 New quiz contains 52 question based on the syllabus for module 3 examination for B1.1, B1.3 and B2 category.
The time limit for the quiz is 65 min.
The number of attempts allowed are unlimited.
All the best.
1.
The state of charge of a lead/acid battery may be determined from the electrolyte:
2.
Through which material will magnetic lines of force pass the most readily?
3.
Of the following phases, which two are 180 degrees apart?
4.
The power factor of an alternating current circuit is:
5.
What is the effective value of current?
6.
A 4 ohm resistor and an inductor of 3 ohms reactance are connected in series the impedance of the circuit is:
7.
The filament of a lamp measures 2.5ohm when cold. With 120 volts applied across the filament, the lamp dissipates 60 Watts. What is the hot resistance of the lamp?
8.
A 24V source is connected across a 30 Kohm resistor. In order to achieve a current flow of 6mA the resistor must be changed to
9.
An alternating current series circuit has 2 amps through a 100ohm resistor and a 173 ohm inductor. The real power is
11.
In order to produce a substantial voltage and current from photovoltaic cells they should be connected in:
12.
One of the laws of magnetism states-'the force between two magnetic poles of constant strength is:
13.
5 amps passes through a 4 ohm resistor, the amount of power the resistor has to dissipate is:
14.
An inductor of 50mH is connected in series with a resistance of 10kΩ. The time taken for the current to reach 63.2% of the maximum is:
15.
For very low frequencies, capacitor acts as
16.
A charge of 36 coulombs moves passed a point in 3 seconds. The flow in amps is:
18.
When a circuit contains both a resistor and an inductor a phase angle is developed between current and voltage, such that:
19.
In the diagram the PD (potential difference) from A to B will be
20.
What is the correct relation between the peak value and peak to peak value for a sinusoidal waveform?
21.
If a pure capacitance and a pure inductance of equal reactance are in series the supply current is:
22.
The voltage rating on a capacitor is the:
23.
When making up electrolyte for lead acid batteries:
24.
When two resistors are connected in series:
25.
The generator characteristic of:
26.
A component is required to have a positive temperature coefficient value. It is likely to be made of:
27.
Calculate the current across the 20 ohm resistor
28.
An alternating current generator is operating at 50kVA in a circuit with a power factor of 0.8. The real power is
29.
Three capacitors having a capacitance equal to 2F, 4F and 6F are connected in parallel. Calculate the effective parallel.
30.
Three resistors of equal value connected in parallel in a circuit. If one of the resistors becomes an open circuit, the current through the circuit will:
31.
The primary of a transformer is supplied with 200V. In the secondary a current of 1A flows through a load of 10 ohms. Assuming 100% efficiency, what is the turns ratio?
33.
The current in a circuit is 6 amps the amount of charge moved in 25 seconds is:
34.
If in an alternating current circuit, resistance is 5 ohm, capacitive reactance is 12 ohm, what is the impedance?
36.
Lamination used in a transformer core:
37.
The most common form of primary cell is:
38.
The average Value of an "alternating current" voltage is calculated as:
39.
In an electrical circuit, EMF (electro motive force) and PD (potential difference):
40.
The aircraft power supply frequency is 400 hertz. The period is:
41.
In a high pass filter the:
43.
A coil induces 200 mV when the current changes at the rate of 1 amp per second. The inductance L is:
44.
Strength of the electric field is
45.
In a star connected system, the phase voltage is:
46.
Compensation windings are:
47.
If 2 charged oppositely charged bodies are close together:
48.
Ohms Law states if the temperature stays constant the:
50.
Calculate the MMF (Magneto Motive Force) of a coil with 2000 turns and a 5mA current:
51.
For high frequencies, capacitor acts as
52.
If a length of wire is cut in half and the two halves connected in parallel the resistance is”