During equilibrium flight operation, stability depends on:

The magnitude of force applied.

Dgca Module 08 Online Test Quiz!

1.

Performance of flight is affected by:
- A.
  
  Temperature
- B.
  
  Density
- C.
  
  Pressure
Correct Answer
B. Density

Explanation
The performance of a flight is affected by density. Density is a measure of how much mass is contained in a given volume of air. In aviation, density is particularly important because it affects the lift, drag, and thrust of an aircraft. As density decreases, such as at higher altitudes, the air becomes less dense and provides less lift for the aircraft. This can result in reduced performance and efficiency. On the other hand, denser air at lower altitudes provides more lift, allowing for better performance. Therefore, density plays a crucial role in determining the overall performance of a flight.

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2.

If the CofP of an aircraft is behind CofG, what happened to the nose?
- A.
  
  Drops
- B.
  
  Pitch up
- C.
  
  Remains same
Correct Answer
A. Drops

Explanation
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.

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3.

In steeper turn, rudder position is taken by:
- A.
  
  Elevator
- B.
  
  Rudder
- C.
  
  Aileron
Correct Answer
A. Elevator

Explanation
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.

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4.

What is the mean sea level pressure?
- A.
  
  1013mb
- B.
  
  101.3 KN/m2
- C.
  
  Both a and b
Correct Answer
C. Both a and b

Explanation
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.

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5.

Distance traveled by aircraft per unit fuel is:
- A.
  
  Air specific range
- B.
  
  Specific fuel consumption
- C.
  
  None
Correct Answer
A. Air specific range

Explanation
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.

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6.

Longitudinal stability is affected by:
- A.
  
  Wing
- B.
  
  Fuselage
- C.
  
  Hull
Correct Answer
C. Hull

Explanation
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.

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7.

During climbing
- A.
  
  Lift is greater than weight.
- B.
  
  Lift is less than weight.
- C.
  
  Lift is equal to weight.
Correct Answer
B. Lift is less than weight.

Explanation
During climbing, the lift force generated by the wings of an aircraft is less than the weight of the aircraft. This is because the lift force needs to overcome the force of gravity acting on the aircraft in order to keep it airborne. In order to climb, the aircraft needs to generate additional thrust to increase its speed and generate more lift to overcome the weight. Therefore, the lift force is less than the weight during climbing.

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8.

During takeoff, preferably aircraft will go:
- A.
  
  Against the wind
- B.
  
  Along with wind
- C.
  
  None of the above
Correct Answer
A. Against the wind

Explanation
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.

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9.

Reynolds number
- A.
  
  Is applicable to supersonic aircraft
- B.
  
  Is applicable to continuous flow
- C.
  
  Both a and b
Correct Answer
B. Is applicable to continuous flow

Explanation
The Reynolds number is a dimensionless quantity that is used to determine the flow characteristics of a fluid. It is applicable to continuous flow, which means it is relevant for systems where the fluid is moving continuously, such as in pipes or channels. Supersonic aircraft, on the other hand, involve high-speed flow and shock waves, which are not considered continuous flow. Therefore, the correct answer is that the Reynolds number is applicable to continuous flow.

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10.

During equilibrium flight operation, stability depends on:
- A.
  
  The magnitude of force applied.
- B.
  
  Length from the C.G
- C.
  
  Both a and b
Correct Answer
C. Both a and b

Explanation
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.

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11.

During climbing, turn lift on an inner wing is
- A.
  
  More
- B.
  
  Less
- C.
  
  Same
Correct Answer
B. Less

Explanation
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.

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12.

Which of the following law applies to the air?
- A.
  
  Newton’s 1st law
- B.
  
  Newton’s 1st & 2nd law
- C.
  
  Newton’s 1st, 2nd & 3rd law
Correct Answer
C. Newton’s 1st, 2nd & 3rd law

Explanation
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.

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13.

Higher Reynolds number.
- A.
  
  Supersonic -turbojet engine
- B.
  
  Subsonic –aircrafts
- C.
  
  None of the above
Correct Answer
A. Supersonic -turbojet engine

Explanation
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.

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14.

Atmospheric pressure measured with an instrument is called
- A.
  
  Altimeter
- B.
  
  Anemometer
- C.
  
  Barometer
Correct Answer
C. Barometer

Explanation
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.

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Dgca Module 08 Online Test Quiz!

Performance of flight is affected by:

If the CofP of an aircraft is behind CofG, what happened to the nose?

In steeper turn, rudder position is taken by:

What is the mean sea level pressure?

Distance traveled by aircraft per unit fuel is:

Longitudinal stability is affected by:

During climbing

During takeoff, preferably aircraft will go:

Reynolds number

During equilibrium flight operation, stability depends on:

During climbing, turn lift on an inner wing is

Which of the following law applies to the air?

Higher Reynolds number.

Atmospheric pressure measured with an instrument is called