Question

In an aircraft, what is the condition for the absolute ceiling?

• A. Maximum rate of climb is \(0\)
• B. Maximum rate of climb is \(100\) ft/min
• C. Rate of descent is \(0\)
• D. Rate of descent is \(100\) ft/min

Hint:

Aircraft ceilings: \[ \boxed{ \begin{aligned} \text{Absolute Ceiling} &\Rightarrow \text{ROC}=0, \text{Service Ceiling} &\Rightarrow \text{ROC}=100\ \text{ft/min}. \end{aligned} } \]

Answer 1

The Correct Option is A

Step 1: Recall the definition of absolute ceiling. The absolute ceiling is the maximum altitude at which an aircraft can maintain level flight. At this altitude, \[ \boxed{ \text{Excess Power}=0. } \]

Step 2: Relate excess power to rate of climb. Since \[ \text{Rate of Climb} = \frac{\text{Excess Power}}{\text{Weight}}, \] when the excess power becomes zero, \[ \boxed{ \text{Maximum Rate of Climb}=0. } \] Therefore, \[ \boxed{\text{Maximum rate of climb is }0} \] is the correct answer. Thus, \[ \boxed{(A)} \] is the correct answer.