Describe the DC voltage selector switch.

Describe the DC voltage selector switch.

• A. Two position, labelled L GEN and R GEN
• B. Four position, labelled OFF, L GEN, BAT and R GEN
• C. Three position, labelled L GEN, BAT and R GEN
• D. Three position, labelled GEN, BAT, OFF

Answer: (C)

The switch’s job is to choose which power source feeds the aircraft’s DC electrical system, connecting only one source at a time to the DC bus. In this Beechjet setup, the switch is three-position and labeled L GEN, BAT, and R GEN. When set to L GEN, the left generator powers the DC bus; when set to BAT, the aircraft battery provides DC power; when set to R GEN, the right generator powers the DC bus. This arrangement gives you normal generator power, a battery start/emergency option, and clear isolation between sources to prevent backfeeding. The other labeled configurations either add an extra position or use ambiguous labels, which don’t match how the DC voltage selector is actually described for this system.

The switch’s job is to choose which power source feeds the aircraft’s DC electrical system, connecting only one source at a time to the DC bus. In this Beechjet setup, the switch is three-position and labeled L GEN, BAT, and R GEN. When set to L GEN, the left generator powers the DC bus; when set to BAT, the aircraft battery provides DC power; when set to R GEN, the right generator powers the DC bus. This arrangement gives you normal generator power, a battery start/emergency option, and clear isolation between sources to prevent backfeeding. The other labeled configurations either add an extra position or use ambiguous labels, which don’t match how the DC voltage selector is actually described for this system.