Engine performance - Study guides, Class notes & Summaries

A8 Engine Performance practice test questions and answers verified 2024

What are the key components in an EVAP system? Fuel Tank, gas cap, lines/hoses, and charcoal canister Catalytic Converter: Oxidizes NOx into CO and HC When testing a connector what is an acceptable reading? a.) 1V from ground side b.) 1V from positive/reference side c.) .5V from at each connector d.) 1.5v from sensor harness C An oxygen sensor is reading 400mv, what would this indicate lean condition What increases NOx emissions? High combustion temperatures You have examined ...

The acceptable amount of alcohol mixed with gasoline (non E-85) is: - ANSWER-Up to 10 percent. When the pressure in the intake manifold increases, the fuel pressure regulator on a port fuel injection system: - ANSWER-Increases fuel pressure. Technician A says to relieve pressure on an PFI (port fuel injection) system, a pressure gauge may be connected to the fuel pressure test port and the bleed (pressure relief) valve on the gauge opened with the bleed hose installed in an approved contai...

During a leak down test, air could be heard coming from the tail pipe. An exhaust valve not sealing When a cylinder head with an overhead camshaft is discovered to be wrapped, what is the repair option? check for cracks, straight in the head, and then surface the head Rack and pining inspection while in normal running position, movement is felt between the tie rod stud and the socket while the tire is moved in and out Torsion bars, exception are not interchangeable blue grey smoke is...

The primary (low-voltage) ignition system must be working correctly before any spark occurs from a coil. Which component is NOT in the primary ignition circuit? - Spark Plug Wires An ion-sensing ignition system allow the ignition system itself to be able to ________. - detect misfire, spark knock, and rich/lean mixture How does a waste-spark ignition system fire the spark plugs? - The same plug always is fired straight or reverse polarity The pulse generator ________. - Signals the electro...

D. The PCV valve should rattle when shaken back and forth. When the thumb is placed over the end of the PCV valve with the engine idling, the plunger should snap back. A water manometer can be used to check the crankcase for vacuum at idle. No blowby test is performed on the PCV system. All of the following are tests performed on the PCV system EXCEPT: A. The rattle test B. The snap- back test C. Crankcase vacuum test D. Blowby test C. Faulty secondary ignition components are common c...

All overhead valve engines ________. - Have the overhead valves in the head An SOHC V8 engine has how many camshafts? - Two Torque is expressed in units of ________. - pound-feet Horsepower is expressed in units of ________. - foots per pound A normally aspirated automobile engine loses about ________ power per 1000 feet of altitude. - 3% One cylinder of an automotive four-stroke cycle engine completes a cycle every ________. - 720 degrees How many rotations of the crankshaft are require...

The basic methodology of the fire investigation should rely on the use of a ______________________ and attention to all relevant details. a. systematic approach b. approximation approach c. methodology approach d. general approach - a. systematic approach With few exceptions, the proper methodolgy for a fire or explosion investigation is to first _____________________ then investigate the cause, circumstances, conditions, or agencies that brought the ignition source, fuel, and oxidant t...

A8 Engine Performance practice test Questions and Answers (100% Pass)