Which gauge shows range 1900-2550 RPM?

Which gauge shows range 1900-2550 RPM?

• A. Airspeed indicator
• B. Oil pressure indicator
• C. Oil temperature indicator
• D. Tachometer

Answer: (D)

The tachometer is the gauge that shows engine speed in RPM. It is calibrated from 0 up to about 3000 RPM, with a green operating range that indicates safe, normal operation. The band from roughly 1900 to 2550 RPM sits inside that green arc, representing the typical range you’d see during normal engine operation in a Cessna 152. This gauge helps you set and monitor power by adjusting the throttle to stay within that range, avoiding over- or under-revving the engine. The airspeed indicator measures speed through the air, the oil pressure indicator shows oil pressure, and the oil temperature indicator shows oil temperature—none of these display revolutions per minute.

The tachometer is the gauge that shows engine speed in RPM. It is calibrated from 0 up to about 3000 RPM, with a green operating range that indicates safe, normal operation. The band from roughly 1900 to 2550 RPM sits inside that green arc, representing the typical range you’d see during normal engine operation in a Cessna 152. This gauge helps you set and monitor power by adjusting the throttle to stay within that range, avoiding over- or under-revving the engine. The airspeed indicator measures speed through the air, the oil pressure indicator shows oil pressure, and the oil temperature indicator shows oil temperature—none of these display revolutions per minute.