AMT 113 EXAM QUIESTIONS WELL ANSWERED LATEST UPDATE 2026

AMT 113 EXAM QUIESTIONS WELL ANSWERED LATEST UPDATE 2026 WHAT ARE THE THREE DIFFERENT TYPES OF BEARING? - Answers Roller, ball, and plain Simpliest type of bearing - Answers Plain For one surface to roll over the other - Answers rolling friction are the basic principles of engine operation. - Answers The relationships between pressure, volume, and temperature of gases Roller bearings are made in many types and shapes, but the two types generally used in the aircraft engine are: - Answers Straight roller and tapered roller bearings is any surface which supports, or is supported by, another surface. - Answers BEARING By the sliding movement of one metal against the other - Answers sliding friction Since this type of bearing can accept both radial and thrust loads, it is used in gas turbine engines to support one end of a shaft (radial loads) and to keep the shaft from moving axially (thrust loads). - Answers Ball bearings are generally used for the crankshaft, cam ring, camshaft, connecting rods, and the accessory drive shaft bearings. - Answers Plain TWO WAYS IN WHICH BEARING SURFACES MOVE IN RELATION TO EACH OTHER - Answers Sliding friction and rolling friction The parts must be held in position within very close tolerances to provide efficient and quiet operation and yet allow freedom of motion. - Answers bearing Radial loads only - Answers Straight roller They are used for shaft bearings and rocker arm bearings in some reciprocating engines. - Answers Ball bearings are usually made of nonferrous (having no iron) metals, such as silver, bronze, aluminum, and various alloys of copper, tin, or lead. - Answers Plain are widely used in this instance. They are impregnated with oil so that the heat of friction brings the oil to the bearing surface during engine operation. - Answers Porous Oilite bushings are required to take radial loads, thrust loads, or a combination of the two. - Answers bearing is a device for converting heat energy into mechanical energy. - Answers internal combustion engine Withstand both radial and thrust loads - Answers Tapered roller Smaller bearings, such as those used to support various shafts in the accessory section, are called - Answers Bushings Bearings are required to take (blank) or a combination of the two - Answers radial loads, thrust loads, 2 OPERATING CYCLE? - Answers Four stroke cycle and two stroke cycle four-stroke cycle, sometimes called the - Answers Otto cycle The operating cycle of an internal combustion - Answers reciprocating engine includes the series of events required to induct, compress, ignite, and burn, causing expansion of the air-fuel charge in the cylinder and to scavenge or exhaust the byproducts of the combustion process. The vast majority of certified aircraft reciprocating engines operate on the - Answers Four stoke cycle includes the series of events required to induct, compress, ignite, and burn, causing expansion of the air-fuel charge in the cylinder and to scavenge or exhaust the byproducts of the combustion process. - Answers The operating cycle of an internal combustion Two complete revolutions of the crankshaft (BLANK) are required for the four strokes; thus, each cylinder in an engine of this type fires once in every two revolutions of the crankshaft. - Answers 720° During the ( ), the piston is pulled downward in the cylinder by the rotation of the crankshaft. - Answers INTAKE STROKE Otto cycle after its originator, a German physicist - Answers Nikolaus August Otto The air-fuel mixture passes through the intake pipes and intake valves into the cylinders. - Answers INTAKE STROKE of the crankshaft (720°) are required for the four strokes; thus, each cylinder in an engine of this type fires once in every two revolutions of the crankshaft. - Answers Two complete revolutions The speed of the exhaust gases leaving the cylinder creates a low pressure in the cylinder. - Answers EXHAUST STROKE Thus, the engine completes the operating cycle in one revolution of the crankshaft. - Answers TWO STROKE CYCLE As the piston travels through BDC at the completion of the power stroke and starts upward on the ( ), it begins to push the burned exhaust gases out the exhaust port. - Answers EXHAUST STROKE As the name implies, ( ) engines require only one upstroke and one down stroke of the piston to complete the required series of events in the cylinder. - Answers TWO STROKE CYCLE As the piston moves through the TDC position at the end of the compression stroke and starts down on the ( ), it is pushed downward by the rapid expansion of the burning gases within the cylinder head with a force that can be greater than 15 tons (30,000 psi) at maximum power output of the engine. It then generates power and turns the crankshaft. - Answers POWER STROKE engine has re-emerged and is being used in ultra-light, light sport, and many experimental aircraft. - Answers TWO STROKE CYCLE