In Thomas's car engine, if one valve is larger, it will be the ________ valve?

During a practical automotive class, Nico and Jasmon are tasked to identify the correct order of operations for a 4-stroke engine. What sequence should they follow?

During a routine check-up of Byron's car, Ricard noticed that the spark plug's electrode was covered with thick black carbon deposits. Which of the following is correct?

During a routine check, Jaheem notices that the oil pressure switch on his car's engine might be malfunctioning. All of the following statements about oil pressure switches are true EXCEPT:

During a routine check-up of a car in an automotive class, Gabe notices a hissing sound coming from the throttle body while performing a cylinder leakage test. This sound indicates:

Darius and Byron are discussing how to prepare an engine for new pistons. Darius says to use a cylinder bore gauge to measure the cylinder's bore for excessive taper. Byron says to measure the cylinder's bore for an out of round condition before installing new pistons. Who is correct?

When Courtney and Samuel are working on replacing connecting rod bearings in an engine

In a practical automotive workshop, Corey is learning about engine maintenance. He discovers that overhead cam engines' timing chains may use ______tensioners. What type of tensioners might be used here?

Imagine Corey's car emits blue smoke for a few seconds when starting cold; the MOST likely cause is

During a practical auto repair class, Corey is tasked with replacing a cylinder head gasket on a vehicle. Which type of head bolts should Corey always replace?

During a workshop, Corey and Naharay are examining the parts of a car engine. Which of the following is not part of a connecting rod?

During a practical class, Courtney noticed that an engine noise could be reduced or eliminated by shorting out an individual cylinder. She wonders, what is the most likely cause of this issue?

During a car maintenance workshop, Courtney learned that the total volume of space displaced by the pistons traveling up and down inside all the cylinders of Matthew's car engine is ________________.

During a school science project, Jasmon and Isaiah are building a model engine. They discuss the volumetric efficiency, which is the engine's ability to:

During a typical drive to school, Malik's car's four-stroke engine piston travels up _____ and down ______.

During a practical auto repair class, Courtney and Samuel are performing a cylinder leakage test on a car. Courtney says that the valves in the cylinder being tested must be closed. Samuel notes that it's normal to hear air coming from the throttle body while performing this test.

Who is correct?

While inspecting a vehicle's engine in an automotive class, Robert says that the demonstrated procedure checks cylinder deck height. Jasmon says that the demonstrated procedure checks for cylinder head warpage. Who is correct?

Ricard says that it is normal to hear air coming out of the exhaust pipe while doing a cylinder leak down test. Courtney says a cooling system pressure tester is used for determining coolant freeze points. Who is correct?

Corey says that a Cylinder Power balance test can help identify problem cylinders. Jasmon says that both valves should be closed during a cylinder leak down test. Who is correct?

Technician Matthew says that measurement Y is the valve spring installed height. Technician Nico says that measurement X will decrease as a result of grinding the valve seat. Who is correct

Matthew observes that oil pressure in his car's engine increases with the RPM during a test drive. Isaiah notes that the lines or hash marks on top of a bolt are used to indicate its grade, not length. Who is correct?

During a practical class, Isaiah is measuring a component in an automotive engine. What is he measuring in this picture?

Naharay and Byron are discussing a bolt with numbers on the head of the bolt. Naharay says it's a standard bolt. Byron says the number indicates the length of the bolt. Who is correct?

During a routine maintenance check, Corey noticed a potential issue in his car's engine. Valve stem seals prevent which of these from leaking into the cylinder?

Technician Liah says that an engine’s cooling system transfers heat from the engine to the atmosphere. Technician Malik says that an engine’s cooling system helps maintain a consistent engine operating temperature.

Who is correct?

Liah and Gabe are discussing engine mechanics. Liah says that valve overlap is when both the intake and exhaust valves are open at the same time. Gabe says that valve overlap is controlled (determined) by the camshaft.

Who is correct?

Imagine Robert is working on his car's engine. He wonders about the functions of motor oil. Which of the following are functions of motor oil?

Technician Gabe says that an interference engine will not be damaged if the timing belt snaps while it is running. Technician Isaiah says that a torque-angle tightening method requires the use of a torque-angle gauge. Who is correct?

Technician Matthew says that a torque-angle tightening method should be used on torque-to-yield bolts. Technician Courtney says you can reuse torque-to-yield bolts if you oil them. Who is correct?

During a practical class, Corey and Isaiah are tasked with measuring a component of a car engine. What are they measuring in the picture?

Courtney says that oil with an API rating of SE is suitable for gasoline engines. Matthew says that oil with an API rating of CD is suitable for commercial vehicles.

During an engine repair class, Technician Timothy says that the crankshaft position sensor is crucial for engine timing. Technician Sherman argues it mainly detects engine speed. Who is correct?

While discussing engine maintenance, Technician Gabe mentions that synthetic oil can extend the oil change interval. Technician Jaheem claims it also enhances engine performance. Who is correct?

In a vehicle maintenance workshop, Technician Darius states that replacing the air filter can improve fuel efficiency. Technician Byron argues it primarily boosts engine power. Who is correct?