Dgca Module 08 Online Test Quiz!

Atmospheric pressure is the force exerted by the weight of the air above a certain point. A barometer is an instrument used to measure atmospheric pressure. It works by balancing the weight of the column of air above it with the weight of a column of mercury or aneroid capsules. Therefore, a barometer is the correct instrument used to measure atmospheric pressure.

During takeoff, it is preferable for an aircraft to go against the wind. This is because when an aircraft takes off against the wind, it experiences an increase in airspeed relative to the ground. This increased airspeed helps to generate more lift, allowing the aircraft to take off in a shorter distance. Additionally, going against the wind provides better control and maneuverability during takeoff.

Newton's 1st law states that an object at rest will stay at rest, and an object in motion will stay in motion with the same speed and in the same direction unless acted upon by an external force. Newton's 2nd law states that the acceleration of an object is directly proportional to the net force applied to it and inversely proportional to its mass. Newton's 3rd law states that for every action, there is an equal and opposite reaction. Since all three laws are applicable to the air, the correct answer is Newton's 1st, 2nd, & 3rd law.

The correct answer is "Supersonic - turbojet engine." A supersonic turbojet engine is capable of operating at speeds greater than the speed of sound. This type of engine is designed to handle the high pressures and temperatures associated with supersonic flight. In contrast, subsonic aircraft operate at speeds below the speed of sound and typically use different types of engines, such as turbofan engines. Therefore, the answer "Supersonic - turbojet engine" is the most appropriate choice given the options provided.

The correct answer is "all of the above" because temperature, density, and pressure all affect the performance of a flight. Temperature affects air density and engine efficiency. Density directly influences lift and engine thrust. Pressure variations can alter engine performance and control surface behavior.

The mean sea level pressure refers to the average atmospheric pressure at sea level. It is commonly measured in millibars (mb) or kilonewtons per square meter (KN/m2). Both options a and b, 1013mb and 101.3 KN/m2, represent the mean sea level pressure, making them both correct answers.

During equilibrium flight operation, stability depends on both the magnitude of force applied and the length from the center of gravity (C.G). The magnitude of force applied affects the balance and control of the aircraft, while the length from the C.G determines the aircraft's stability. Therefore, both factors are crucial in maintaining stability during equilibrium flight.

When the Center of Pressure (CofP) of an aircraft is located behind the Center of Gravity (CofG), the nose of the aircraft drops. This means that the front part of the aircraft moves downward, causing the aircraft to pitch down. This can lead to a decrease in altitude or a descent in the aircraft's flight path. It is important to maintain proper balance between the CofP and CofG to ensure stable and controlled flight.

In a steeper turn, the rudder position is taken by the elevator. The elevator is responsible for controlling the pitch of the aircraft, which is the up and down movement. By adjusting the elevator position, the pilot can control the aircraft's angle of attack and maintain the desired altitude during the turn. The rudder, on the other hand, is primarily used for controlling the yaw of the aircraft, which is the left and right movement. Therefore, in a steeper turn, the elevator is used to maintain the desired altitude while the ailerons are used to control the roll of the aircraft.

During climbing, turning the lift on an inner wing is less. This is because during climbing, the aircraft needs to generate more lift on the outer wing to counteract the increased load on that side. This is achieved by increasing the angle of attack on the outer wing, which in turn decreases the angle of attack on the inner wing. As a result, the lift generated on the inner wing is reduced compared to the lift on the outer wing.

The correct answer is "Air specific range." Air specific range refers to the distance an aircraft can travel per unit of fuel consumed. It is a measure of fuel efficiency and is an important factor in determining the range and endurance of an aircraft. It takes into account various factors such as aircraft weight, engine performance, and fuel consumption rate. By maximizing the air specific range, aircraft can achieve longer flights and reduce fuel consumption.

The hull of an aircraft refers to its main body structure. It plays a crucial role in providing stability to the aircraft, especially in longitudinal stability. The shape and design of the hull determine the distribution of weight and lift, which affects the balance and stability of the aircraft during flight. Therefore, the hull is a significant factor that affects longitudinal stability in an aircraft.

The Reynolds number can be relevant for supersonic aircraft, but its primary use is in characterizing the flow of fluids, which includes air, in different regimes. However, in supersonic flow, other dimensionless numbers like the Mach number are more directly relevant. The Reynolds number is indeed applicable to continuous flow, as it helps in determining the nature of the flow (laminar or turbulent) in a continuous fluid stream.

So, the correct answer is:

Both a and b