Electrical Installation Level 1 Review Quiz

What is the correct definition of Ohm's Law?

• Ohm's Law is V = R / I
• Ohm's Law states voltage and current are indirectly related.

• Ohm's Law states that the current through a conductor is inversely proportional to resistance of that conductor given by the equation I=V*R

• Ohm's Law states that the current (I) through a conductor is directly proportional to the pd (V) across its ends given by the equation V=I*R

Which of these is NOT an electrical safety rules?

• If you get hurt, get help only when the job is complete.

• Frayed wires are dangerous and must be reported.

• Always use the correct size fuse or breaker.

• Do not block access to electrical panels.

Electrical hand tools must be properly _______

If you list the electrical symbols from 1 to 6, with one being the one at the top, which option correctly identifies the symbols?

• 1- capacitor

  2- a.c power

  3- single outlet

  4- bell

  5- single cell

  6- fixed resistor

• 1- capacitor

  2-a.c power

  3 - coil

  4- diode

  5- single cell

  6- fixed resistor

• 1- battery

  2- bulb

  3- transformer

  4- ohmmeter

  5- conductor

  6- variable resistor

• 1- capacitor

  2- bulb

  3- coil

  4- diode

  5- single cell

  6- fixed resistor

Label the parts of the atom.

• Nucleus, Protons, Neutrons, Electron Field, Electrons
• Nucleus, Protons, Neutrons, Electron Cloud, Electrons
• Nucleus, Positrons, Neutrons, Electron Cloud, Electrons
• Molecules, Protons, Neutrons, Electron Cloud, Electrons

Which component is not present in the circuit in the picture?

• bell

• resistor
• switch

• battery/ cell

A voltage of 12 V is applied across a lamp of resistance 5Ω. Find the current flowing through the lamp.

• 2.4A
• 4.8A
• 1.2A
• 3.6A

what is the maximum voltage that can be applied to a 20 Ω resistor is the current flowing through the lamp cannot exceed 1.5 A.

• 40 V
• 15 V
• 30 V
• 25 V

define alternating current.

• An electric current that reverses direction at regular intervals.
• An electric current that is used in direct current circuits.
• An electric current that is constant and unchanging.
• An electric current that flows in one direction only.

Explain what is meant by electrical power and state its formula.

• The rate of at which work is done. The formula is P= V/I

• the time it takes to get from one point to another. D= s*t

• Current that flows through one direction only. D=I/f

• The rate of doing work. The formula is P=V*I