PCB(2)_General PCB Design Considerations

What is the purpose of a printed circuit board (PCB)? ​

• To provide support for circuit components ​

• To interconnect circuit components electrically ​

• Both a) and b)

• None of the above

Answer explanation

The purpose of a printed circuit board (PCB) is to provide support for circuit components and to interconnect circuit components electrically, making the correct answer choice 'Both a) and b).'

Which of the following factors should be considered while designing printed circuit boards?

• Mechanical design requirements ​​

• Electrical design requirements ​

• Functional design parameters

• All of the above

Answer explanation

All of the above factors should be considered while designing printed circuit boards, including mechanical design requirements, electrical design requirements, and functional design parameters.

3. What are the important design elements that should be provided by the equipment designer to the PCB designer? ​

• Type of circuit

• Board size ​

• Number of layers

• All of the above

Answer explanation

The important design elements that should be provided by the equipment designer to the PCB designer include the type of circuit, board size, and number of layers, making 'All of the above' the correct choice.

4. Which of the following is an important performance parameter for PCBs?

• Tensile strength

• Flexural strength ​

• Shock and vibration resistance ​

• All of the above

Answer explanation

The correct choice is 'All of the above' because tensile strength, flexural strength, and shock and vibration resistance are all important performance parameters for PCBs.

5. Which type of board is mostly used in applications where costs have to be kept at a minimum? ​

• Single-sided boards ​

• Double-sided boards ​

• Multi-layer boards ​

• PTH boards

Answer explanation

Single-sided boards are mostly used in applications where costs have to be kept at a minimum due to their lower production costs compared to double-sided or multi-layer boards.

What is the purpose of jumper wires in the layout design of single-sided boards?

• To jump over conductor tracks ​

• To provide support for circuit components ​

• To interconnect circuit components electrically

Answer explanation

Jumper wires are used to jump over conductor tracks in the layout design of single-sided boards, allowing for the interconnection of circuit components.

In PTH boards, via holes should be utilized only for:

• Through contacts

• Component mounting ​

• Both a) and b)

Answer explanation

Via holes in PTH boards should be utilized only for through contacts, not for component mounting.

8. What is the usual range of the ratio S:C for the most common types of PCB?

• 1:1

• 2:1

• 3:1

• 4:1

Answer explanation

The correct ratio for the most common types of PCB is 3:1, as the usual range of the S:C ratio falls within this value.

9. Which of the following is not an important consideration in mechanical design for PCBs?

• Size, shape, and weight

• Location of components and their mounting

• Circuit function and wiring distribution

• Shielding and equipment marking

Answer explanation

The correct choice is Circuit function and wiring distribution because it is not an important consideration in mechanical design for PCBs.

10. What is the main feature of schematic diagrams according to the guidelines mentioned in the document?

• Signal flow moves from right to left across the page

• Inputs are on the right and outputs are on the left ​

• Electronic potentials (voltages) increase from top to bottom

• Power connections are often omitted ​

Answer explanation

The main feature of schematic diagrams is that inputs are on the right and outputs are on the left, as mentioned in the document guidelines.