FAA General Oral Exam Questions and answers

Describe the result of adding a large positive number and a smaller negative number. The result is a smaller positive number, and is the same as ignoring the signs and subtracting the smaller number from the larger. How do you convert a fraction into a decimal? Divide the top number (Numerator) by the bottom number (denominator). Brainpower Read More Previous Play Next Rewind 10 seconds Move forward 10 seconds Unmute 0:00 / 0:15 Full screen What is the key step that must be performed in order to add or subtract unlike fractions? You must find the lowest (Least) common denominator. How do you divide one fraction by another? You invert the divisor and multiply the numerators together and the denominators together. How can you convert a decimal into a percent? (1) Multiply the decimal by 100 and add the percent sign. (2) Move the decimal point two places to the right and add the percent sign. How do you convert a fraction into a percent? Convert it to a decimal, move the decimal point two places to the right and add the percent sign How do you change a decimal into the nearest equivalent fraction? Multiply the decimal by the desired denominator. The result becomes the numerator in the traction. What are two different ways that a ratio may be expressed? (1) As a fraction. (2) By placing a colon (s) between the two numbers. (3) By using the word '10" between the two numbers What is a proportion? — A statement of equality between two or more ratios. What is meant by the root of a number? A root is two or more equal smaller numbers that, when multiplied together, equal the specified number. How do you find the square of a number? Give an example. Multiply the number by itself Examples: 4 X 4 =16, 7 X 7 =49 What is a common method of making computations involving very large or very small numbers more manageable? Convert the numbers into scientific notation by using powers of 10. How is 100.000 expressed as a power of 10? 10^5 (10 to the 5'" power). What formula is used to find the area of a rectangle and of a triangle? For a rectangle, A = L X W. For a triangle, A = 1/2(B X H). Define Pi (π) Pi is a constant that expresses the relationship between the gigozngterence of a circle and its diameter and is approximately equal to Describe a trapezoid. A trapezoid is a closed, four-sided figure having two parallel sides and two sides that are not parallel. What is the formula for computing the area of a circle? A=πr^2 Define matter. Any substance that occupies space and has mass. Matter may exist in what three states? Solid, liquid, gas, (Plasma). Define kinetic energy. Kinetic energy is the energy of motion, Work is the product of what two factors? Force and the distance moved, What are the parts of a lever? A rigid bar and a pivot point called the fulcrum. A wheelbarrow is an example of what class of lever? A second-class lever. Are all three states of matter affected by thermal expansion and if so, which state is affected most? All three states are affected, with gases being affected the most. What is a British Thermal Unit? The amount of heat energy required to change the temperature of 1 pound of water 1 degree Fahrenheit. Name the three methods of heat transfer? Conduction, convection and radiation. What term defines the temperature at which all molecular motion ceases? Absolute zero. Can liquids be compressed? No, liquids are generally considered incompressihle. What are the customary units used to express hydraulic or pneumatic pressure in the United States? Pounds per square inch (PSI) Describe how pressure is transmitted when a force is applied to a confined liquid. Pressure is transmitted equally in all directions, What formula expresses the relationship between force, pressure and area? Force equals area times pressure What is the approximate speed of sound at sea level on a standard day? 661 Knots or 340 meters per second. What is the atmospheric pressure at sea level on a standard day? 29.92 inches of Mercury or 10132 millibars On a standard day at sea level, what is the value for temperature? - 59°F or 15°C. What are the factors that determine density altitude? Temperature and atmospheric pressure. What is the term used to describe the ratio between the amount of moisture actually present in the atmosphere as compared to the amount the air could hold if it were completely saturated? Relative humidity. What are the four principle forces acting on an airplane in flight? Lift, drag, thrust and gravity. What is the term that describes the angle between the relative wind and the chord line of an airfoil? The Angle of Attack. What are the factors that cause an airplane wing to stall? stall is caused when the angle of attack exceeds a critical value and the airflow separates from the upper surface and becomes turbulent. What are the principle effects that result from lowering the flaps while in flight? Lift increases, drag increases and stall speed decreases. What is the function of a wing mounted vortex generator? Vortex generators delay or keep the airflow from separating from the upper surface of a wing during high speed flight. How does blade—flapping help to compensate for dissymmetry of lift in helicopter main rotor systems? Flapping increases the angle of attack and lift on the retreating blade and decreases the angle of attack and lift on the advancing blade. One kilowatt is equal to how many watts? 1,000 watts. What law describes the most fundamental or basic relationships in an electrical circuit? Ohm's law. What are the three elements of Ohm's law? Voltage. current and resistance. How would you write Ohm's law as an equation? E=IxR, R=E/I, l=E/R If the resistance in a DC circuit remains the same but the voltage doubles, what happens to the amount of current flowing in the circuit? It also doubles. In DC circuits, what unit measures power? Watts. What three elements are required to form an electrical circuit? A source of electrical energy, a load or resistance to use the electricity, and wires or conductors to connect the source to the load. DC circuits can take one of three forms or types. What are they? Series, parallel and complex (or series-parallel). A 24-volt lead-acid battery has how many cells? Twelve. A fully charged lead—acid battery has a specific gravity that varies between what two values? 1.275 and 1.300, You must apply a correction to the specific gravity reading of the electrolyte of a lead-acid battery when the temperature is outside of what two values? Whenever the temperature is less than 70°F or more than 9