Which statement describes the startup capability of gas turbines?

• A. Very long startup time
• B. Rapid start and carry full load
• C. Only manual start
• D. Must be at full load to start

Answer: (B)

Gas turbines are designed to start quickly and bring the output up to full load fast. They use a starter to bring the rotor up to speed, and once the speed is sufficient, fuel is added and the machine quickly develops full power. This rapid start capability comes from the turbo’s relatively low rotating inertia and fast-responding control systems, making it ideal for peaking or quick-demand operation. The other statements don’t fit because a gas turbine does not require a long start, is not limited to manual starts, and cannot be started at full load without first accelerating to operating speed.