CAD CAD Specialist Electrical and Electronics Design

Question 1

What does a 'net' represent in an electrical schematic?

Accepted Answer

An electrical connection shared between two or more component pins

Answer

A physical wire routed on a PCB

Answer

A ground plane poured across a layer

Answer

A component package footprint

Question 2

Which US standard defines graphic symbols used for electrical and electronics schematic diagrams?

Accepted Answer

ANSI/IEEE 315

Answer

ASME Y14.5

Answer

ISO 128

Answer

IEC 60617

Question 3

What is a 'block attribute' used for in AutoCAD electrical symbol blocks?

Accepted Answer

Storing variable text such as part numbers or component values within a reusable block

Answer

Setting the display color of a symbol

Answer

Locking a layer from editing

Answer

Defining a hatch fill inside the symbol boundary

Question 4

What is a 'ladder diagram' primarily used to document in electrical CAD?

Accepted Answer

PLC logic for industrial control systems

Answer

3D wire harness routing in an enclosure

Answer

PCB copper trace layouts

Answer

Single-line power distribution topology

Question 5

What does a 'reference designator' (RefDes) identify in an electrical schematic?

Accepted Answer

Each unique component instance on a schematic (e.g., R1, C3, U5)

Answer

The pin count of a component

Answer

The manufacturer's part number

Answer

The voltage rating of the component

Question 6

What does 'cross-referencing' accomplish in a multi-sheet electrical schematic set?

Accepted Answer

Connects wire nets that continue on different sheets by matching labels or connectors

Answer

Links component footprints to their 3D models

Answer

Flags duplicate reference designators across sheets

Answer

Exports the bill of materials to a spreadsheet

Question 7

In an electrical panel layout drawing, what does a 'terminal strip' represent?

Accepted Answer

A row of individual terminals used to join wires from different circuits

Answer

A power bus bar connecting main circuit breakers

Answer

A grounding conductor running along the panel enclosure

Answer

A label strip affixed to the front door of the panel