PCB(4)_Mechanical Design Considerations (2)

What is a factor to consider when deciding whether to locate components on one or more than one boards?

• Color of the PCB

• Type of connectors used

• Shape of the available volume

• Number of interconnections

Answer explanation

The shape of the available volume is a factor to consider when deciding whether to locate components on one or more than one boards, as it determines the physical space available for placement.

What are some advantages of splitting the board into two or more boards?

• Easier layout design

• Fewer interconnections

• Higher cost

• Less maintenance

Answer explanation

Splitting the board into two or more boards allows for easier layout design, making it a more advantageous option.

What type of machines have made it possible to have larger boards, particularly for professional boards?

• Manual drilling machines

• Laser cutters

• 3D printers

• CNC machines

Answer explanation

CNC machines have made it possible to have larger boards, particularly for professional boards by automating precise cutting and drilling processes.

What is the most common method of providing electrical interface between the PCB and the associated equipment?

• Glue

• Welding

• Screws

• Connectors

Answer explanation

The most common method of providing electrical interface between the PCB and the associated equipment is through connectors, which allow for easy and secure connections without the need for permanent bonding like glue or welding.

What is the basic requirement of tools used for printed board extraction?

• Use minimum board space

• Use maximum board space

• Cause damage to the board

• Increase component size

Answer explanation

The basic requirement of tools used for printed board extraction is to use minimum board space, not maximum board space, cause damage to the board, or increase component size.

What is the most common type of conductor width determined by?

• Type of connectors

• Component packing density

• Number of layers

• Board color

Answer explanation

The most common type of conductor width is determined by the component packing density, as it influences the spacing and size of conductors on a PCB.

What introduces a voltage drop proportional to the current flowing in a particular conductor on a PCB?

• Capacitance

• Impedance

• Resistance

• Inductance

Answer explanation

Resistance introduces a voltage drop proportional to the current flowing in a particular conductor on a PCB due to Ohm's Law (V=IR).

What does the resistance of a conductor on a PCB depend upon?

• Specific resistivity

• Color of the PCB

• Thickness of the board

• Number of components

Answer explanation

The resistance of a conductor on a PCB depends on the specific resistivity of the material used, not on the color of the PCB, thickness of the board, or number of components.

What is the standard rule for the optimum thickness of printed wiring on a PCB?

• 10mm

• 5mm

• 1mm

• There is no standard rule

Answer explanation

The correct answer is 'There is no standard rule' because the optimum thickness of printed wiring on a PCB can vary based on specific design requirements and constraints.

Which standard specifies the performance requirements of the finished rigid printed boards?

• IPC-6012

• ISO 9001

• ANSI/IPC 2221

• IEEE 802.11

Answer explanation

IPC-6012 specifies the performance requirements of the finished rigid printed boards, making it the correct choice for this question.