WorksheetsLesson 3 - CAD Schematic Capture & Simulation Quiz
Total questions: 10
Worksheet time: 6mins
What does ERC stand for in CAD design?
Electrical Rule Check
Electronic Resistor Code
Error Recognition Chart
Electrical Resistance Calculator
Why is an ERC important before PCB layout?
It increases circuit speed
It finds wiring and power errors
It makes the circuit cheaper
It adds extra components
Which BS 3939 symbol represents a capacitor?
Zig-zag line
Triangle with line
Two parallel lines
Circle with cross
In a 555 monostable, which pin is triggered to start the timing cycle?
RESET
TRIG
DISCH
OUT
What is the timing formula for a 555 monostable pulse width?
T = RC
T = R / C
T = 1.1 × R × C
T = R × C × V
Why is a flyback diode used with an inductive load?
To regulate voltage
To protect the transistor from voltage spikes
To increase current gain
To convert AC to DC
What information should a Bill of Materials (BOM) include?
A timing table
A list of components, values, and quantities
Simulation results
Supplier codes and part numbers
Why is adding supplier and code information to a BOM important?
It makes the schematic easier to draw
It changes how the circuit works
It ensures the right parts are ordered for manufacture
It links the CAD design to real-world procurement
When running a transient simulation, what should be measured?
Peak current
Output pulse width
Total resistance
Supply voltage ripple
Why might Tsim differ from Tcalc in your results?
Human error only
Component tolerances or model effects
ERC always changes the timing
The 555 formula is wrong
