Which term describes a form of altimeter with an adjustable barometric scale used for setting the reference pressure?

• A. Sensitive altimeter
• B. Semimonocoque
• C. SIGMET
• D. Service ceiling

Answer: (A)

A form of altimeter with an adjustable barometric scale used for setting the reference pressure is called a sensitive altimeter. The adjustable scale, shown in the Kollsman window, lets you dial in the current altimeter setting (the pressure at mean sea level). When you set this, the instrument converts the surrounding static pressure into an altitude reading above sea level. Sensitive altimeters are designed to respond to small pressure changes, giving precise readings important for accurate altitude control. The other terms refer to unrelated concepts: semimonocoque is a type of aircraft structure, SIGMET is a weather advisory, and service ceiling is a performance limit of an aircraft.