Coming Soon

EAL 7345 Unit NETK3-08 Online Exam

C&G 2357 Unit 309 Online Exam

C&G 5357 Unit 003 Online Exam

3. Understand basic mechanics and the relationship between force, work, energy and power.

3.1 Specify what is meant by mass and weight.

3.2 Explain the principles of basic mechanics as they apply to levers, gears and pulleys - Covering Class I, Class II and Class III levers.

3.3 Describe the main principles of the following and their inter-relationships:

• · Force
• · Work
• · energy (kinetic and potential)
• · power
• · efficiency

3.4 Calculate values of mechanical energy, power and efficiency.

4. Understand the relationship between resistance, resistivity, voltage, current and power.

4.1 Describe the basic principles of electron theory.

4.2 Identify and distinguish between materials which are good conductors and insulators - Relating to cables used in electrical installation work.

4.3 Describe what is meant by resistance and resistivity in relation to electrical circuits.

4.4 Explain the relationship between current, voltage and resistance in parallel and series D.C. circuits - Covering basic types of circuits.

4.5 Calculate the values of current, voltage and resistance in parallel and series D.C. circuits.

4.6 Calculate values of power in parallel and series D.C. circuits.

4.7 State what is meant by the term voltage drop in relation to electrical circuits.

4.8 Describe the chemical and thermal effects of electric currents, such as: Chemical: primary and secondary cells, electroplating. Heating: Cookers, water heaters, soldering irons, electric fires etc.

5. Understand the fundamental principles which underpin the relationship between magnetism and electricity.

5.1 Describe the effects of magnetism in terms of attraction and repulsion - Covering the fundamental laws of magnetism.

5.2 State the difference between magnetic flux and flux density.

5.3 Describe the magnetic effects of electrical currents in terms of:

• · production of a magnetic field
• · force on a current-carrying conductor in a magnetic field
• · electromagnetism
• · electromotive force.

5.4 Describe the basic principles of generating an A.C supply in terms of:

• · a single-loop generator
• · sine-wave
• · frequency
• · EMF
• · magnetic flux.

5.5 Identify the characteristics of sinewaves.

6. Understand the types, applications and limitations of electronic components in electrical systems and equipment.

6.1 Describe the function and application of electronic components that are used in electrical systems.

6.2 State the basic operating principles of electronic components and devices.

Electronic components and devices:

• o Capacitors
• o Resistors
• o Rectifiers
• o Diodes: Zener, LED; photo
• o Thermistors
• o Diacs
• o Triacs
• o Transistors
• o Thyristors
• o Invertors.

Electrical systems:

• o Security alarms
• o Telephones
• o Dimmer switches
• o Heating/boiler controls
• o Motor control
• o Wireless control systems.