NIFE Aerodynamics Questions and Answers Already Passed

NIFE Aerodynamics Questions and Answers Already Passed What forces act on an aircraft in flight? a) Lift and drag b) Lift and thrust c) Lift, drag and thrust d) Lift, drag, weight and thrust d) Lift, drag, weight, and thrust Total pressure is comprised of what two elements? a) Potential and dynamic b) Potential and kinetic c) Kinetic and dynamic d) Dynamic and static d) Dynamic and Static What is the relationship between altitude and density? a) Independent b) Direct c) Inverse c) Inverse: "The distance between individual air particles increases with altitude, resulting in fewer particles per unit volume. Therefore, air density decreases with an increase in altitude" What force relationship must exist for an aircraft to maintain equilibrium flight? a) The sum of all the forces and moments about the center of gravity must equal zero b) Lift must equal weight c) Thrust must equal weight d) Thrust must equal drag a) "Equilibrium flight exists when the sum of all forces and the sum of all moments around the center of gravity are equal to zero." What would increase the density of air acting on an aircraft? a) An increase in altitude b) An increase in air temperature c) A decrease in altitude d) A decrease in static pressure where temperature is constant c) Decrease in altitude: "The distance between individual air particles increases with altitude, resulting in fewer particles per unit volume. Therefore, air density decreases with an increase in altitude" What equation expresses the General Gas Law? a) P = ρKT b) ρ = P/RT c) P = ρT d) RP = ρT b) Original equation is P = ρRT. Roll is defined as the movement of the lateral axis about which axis. a) Lateral b) Longitudinal c) Vertical d) Horizon b) Longitudinal: "Movement of the lateral axis around the longitudinal axis is called roll." The wingspan includes the area within the fuselage area? a) True b) False a) True: "Wingspan (b) is the length of a wing, measured from wingtip to wingtip." The chordline is: a) The wings center line b) An infinitely long straight line drawn through the leading and trailing edges of an airfoil c) A measure of the length of the wing d) The average distance from the wing root to the wingtip b) "Chordline of an airfoil is an infinitely long, straight line which passes through its leading and trailing edges." According to the continuity equation for incompressible airflow, what is the relationship between area, airflow velocity and mass airflow for a streamtube? a) Airflow velocity increases as stream tube area increases, to maintain a constant mass airflow b) Airflow velocity increases as stream tube area decreases, to maintain a constant mass airflow c) Airflow velocity remains constant as stream tube area decreases, to maintain a constant mass airflow d) Airflow velocity decreases as stream tube area decreases, to maintain a constant mass airflow b) Given A1V1 = A2V2, “If the cross sectional area decreases on one side of the equation, the velocity must increase on the same side so both sides remain equal.” Since a streamtube is a closed-system, mass and/or energy must be held constant When will the value of indicated airspeed equal the aircraft's