A flame effect that is operated manually without the use of an automatic control system.

• A. Flame Effect
• B. Automatic Flame Effect
• C. Manual Flame Effect
• D. Direct ignition

Answer: (C)

The main idea here is differentiating how a flame effect is controlled. When a flame effect is operated by a person with no automated system handling timing or sequencing, it is a manual flame effect. The term explicitly conveys that human input drives the flame rather than any automated controls. The other phrases don’t fit this scenario: a generic flame effect is too vague about control, an automatic flame effect implies a control system is managing it, and direct ignition refers to how the flame is ignited, not how it’s operated over time. So describing the setup as manual flame effect accurately reflects the hands-on operation without automation.