Aerospace Quiz: Trivia Questions! MCQ

During the construction of the first airplanes, plywood was used as the material. Plywood is a lightweight and strong material made by gluing together several layers of thin wood veneers. It was a popular choice for aircraft construction due to its durability, flexibility, and low weight. Plywood provided the necessary strength and stability required for the early aircraft while keeping the overall weight of the plane relatively low.

The correct answer is Scramjet engine. The picture likely shows a Scramjet engine because it is a type of engine specifically designed for high-speed propulsion. Unlike traditional jet engines, Scramjet engines do not have moving parts and rely on the high speed of the incoming air to compress and ignite the fuel, making them suitable for hypersonic speeds.

IAS stands for Indicated Air Speed, which is the speed that aircraft estimate by measuring air pressures. This measurement is obtained through instruments such as the pitot-static system, which measures the difference between the atmospheric pressure and the pressure created by the aircraft's motion through the air. IAS is an important parameter for pilots as it helps them determine the aircraft's performance and ensure safe operation.

Monopropellant is different from rocket fuel because it does not require an oxidizer to generate thrust. Rocket fuel, on the other hand, needs both fuel and oxidizer to produce combustion and generate thrust. Monopropellants are designed to be self-contained and can undergo a chemical reaction that releases energy without the need for an external oxidizer. This makes them simpler and more convenient to use in certain applications where the use of an oxidizer may not be practical or feasible.

A vernier rocket is a type of rocket that uses a secondary engine, called a vernier engine, to provide precise control and adjustments to the rocket's trajectory. This is typically used in spacecraft or missiles to make fine adjustments during flight. Since option C is the only one labeled as a vernier rocket, it is the correct answer.

Thrust vectoring is the process used when the aircraft stops hovering in the air and starts moving forward. This technique involves redirecting the thrust of the engines to change the direction of the aircraft. By adjusting the angle of the engine nozzles, the aircraft can generate forward propulsion and move in the desired direction. This allows for greater maneuverability and control during flight.

By spraying some of the propellant on the rocket engine exhaust, the propellant absorbs some of the heat generated by the engine. This helps in preventing the exhaust from overheating. The propellant acts as a coolant, dissipating the excess heat and maintaining the temperature within a safe range.

Attitude control is the term used to describe controlling the orientation of an object with respect to an inertial frame of reference or another entity. It involves adjusting the object's position, roll, pitch, and yaw angles to achieve a desired orientation. This control is crucial in various applications, such as spacecraft maneuvering, aircraft stabilization, and robotics, where maintaining a specific attitude is necessary for proper functioning and stability.

The reason scientists believe it is not possible to make an EM drive is because it violates the law of conservation of momentum. This law states that the total momentum of an isolated system remains constant unless acted upon by an external force. The EM drive claims to generate thrust without expelling any propellant, which contradicts this fundamental principle. If the EM drive were to work as claimed, it would mean that momentum is being created out of nothing, which goes against our understanding of physics. Therefore, scientists are skeptical about the feasibility of the EM drive.

Uber announced to use the seen technology to make 'Flying Taxis'.

The principle shown in the image is Bernoulli's Principle. This principle states that as the speed of a fluid increases, its pressure decreases. It is based on the conservation of energy in a fluid flow system. This principle is applicable to various phenomena, such as the lift force generated by an airplane wing, the flow of blood in arteries, and the operation of a carburetor.

The recently unveiled Space Vehicle shown in the picture is called Dragon 2.0.

Lagrange points, also known as Lagrangian points, are the points in space where the gravitational forces of two large objects, such as a planet and its moon, balance the centrifugal force felt by a smaller object. At these points, the gravitational pull from the two objects cancels out, allowing a smaller object to remain relatively stationary with respect to the larger ones. Lagrange points are stable locations where spacecraft and satellites can be placed to minimize fuel consumption and maintain a consistent position relative to the two larger objects.