Automotive service final exam with correct answers 2024

How many degrees of CAMSHAFT rotation are needed to complete the four stroke combustion cycle? - correct answer 360 Torque is expressed in units of _________. - correct answer Pound-feet How many degrees of CRANKSHAFT rotation are needed to complete the four stroke combustion cycle? - correct answer 720 Technician A says that changing connecting rod length changes engine stroke. Technician B says that changing connecting rod length changes the position of the piston in the cylinder. Which technician is correct? - correct answer Technician B How many degrees of CAMSHAFT rotation are needed for a piston to travel from TDC to BDC and return to TDC? - correct answer 180 An SOHC V8 engine has how many camshafts? - correct answer Two Which component is NOT needed in a typical overhead cam engine? - correct answer Push rod The ________ converts linear motion of the pistons into rotary motion. - correct answer Crankshaft Horsepower is _________. A. A measurement of engine power B. Calculated as torque multiplied by engine speed (RPM) and then divided by 5,252 C. Also called cubic inch displacement D. Both A and B - correct answer D. Both A and B A windage tray in the oil pan helps to reduce ________ in the engine oil. - correct answer Foaming If coolant is mixed 50/50 with water, what is the freezing point? - correct answer -34°F (-37°C) The additives used in coolants such as the dye and anticorrosion additives are about what percentage of the coolant? - correct answer 3% DEX-COOL is what type of coolant? A. Propylene glycol B. Ethylene glycol C. OAT D. Both B and C - correct answer D. Both B and C Normal oil pump pressure in an engine is ______ PSI. - correct answer 10 to 60 Oil passages in an engine block are usually called ________, - correct answer Galleries Adding a chemical to make ethylene glycol bitter to the taste is called ______. - correct answer Embittered Using 100% coolant in the cooling system improves the cooling capacity of the system. True or false. - correct answer False Some vehicles use an oil cooler the help maintain proper oil temperature. Oil temperature range should be _________. - correct answer 212° F to 300° F An engine is operating at 2,000 RPM while the vehicle is traveling down the highway. The oil pressure should be about ______. - correct answer 20 PSI or higher Most trucks and larger RWD vehicles use which type of frame? - correct answer Full frame Which of the following linkage types may be used with a rack and pinion design? - correct answer Tie rods Technician A says that federal law requires all vehicles to be equipped with collapsible steering columns. Technician B says that a tilt mechanism allows the steering wheel to turn more sharply. Which technician is correct? - correct answer Question options: Technician A only The types of frames used include A. Stub-type frame B. Full frame C. Ladder frame D. Any of the above, depending on the vehicle - correct answer Any of the above, depending on the vehicle Which is a type of spring? A. Coil B. Leaf C. Torsion bar