Technician T6C: Reading schematics
These are the 12 official questions in group T6C of the 2026–2030 Technician question pool, with the correct answer marked and a plain-English explanation of why it's right. The real exam asks one question from this group.
- T6C01Question 1
What is an electrical diagram using standard component symbols called?
- AConnection chart
- BInstrumentation system
- CSchematic Correct
- DFlow chart
Why: A diagram drawn with standard component symbols is a schematic.
- T6C02Question 2
What is component 1 in figure T-1?
- AResistor Correct
- BTransistor
- CBattery
- DConnector
Why: Component 1 in T-1 is the zig-zag resistor symbol.
- T6C03Question 3
What is component 2 in figure T-1?
- AResistor
- BTransistor Correct
- CIndicator lamp
- DConnector
Why: Component 2 in T-1 is a transistor: a circle with three leads.
- T6C04Question 4
What is component 3 in figure T-1?
- AResistor
- BTransistor
- CLamp Correct
- DGround symbol
Why: Component 3 in T-1 is a lamp: a circle with an X.
- T6C05Question 5
What is component 4 in figure T-1?
- AResistor
- BTransistor
- CGround symbol
- DBattery Correct
Why: Component 4 in T-1 is a battery: long and short parallel lines.
- T6C06Question 6
What is component 6 in figure T-2?
- AResistor
- BCapacitor Correct
- CRegulator IC
- DTransistor
Why: Component 6 in T-2 is a capacitor: two parallel plates.
- T6C07Question 7
What is component 8 in figure T-2?
- AResistor
- BInductor
- CRegulator IC
- DLight emitting diode Correct
Why: Component 8 in T-2 is an LED: a diode symbol with arrows pointing out.
- T6C08Question 8
What is component 9 in figure T-2?
- AVariable capacitor
- BVariable inductor
- CVariable resistor Correct
- DVariable transformer
Why: Component 9 in T-2 is a variable resistor: a resistor with an arrow.
- T6C09Question 9
What is component 4 in figure T-2?
- AVariable inductor
- BDouble-pole switch
- CPotentiometer
- DTransformer Correct
Why: Component 4 in T-2 is a transformer: two coils side by side.
- T6C10Question 10
What is component 3 in figure T-3?
- AConnector
- BMeter
- CVariable capacitor
- DVariable inductor Correct
Why: Component 3 in T-3 is a variable inductor: a coil with an arrow.
- T6C11Question 11
What is component 4 in figure T-3?
- AAntenna Correct
- BTransmitter
- CDummy load
- DGround
Why: Component 4 in T-3 is an antenna.
- T6C12Question 12
Which of the following is accurately represented in electrical schematics?
- AWire lengths
- BPhysical appearance of components
- CComponent connections Correct
- DAll these choices are correct
Why: Schematics show how components are connected, not their physical size or layout.