Exam 9: Automotive Engine Designs and Diagnosis

Engine oil pressure testing is being discussed. Technician A says that oil pressure should be tested with the engine cold. Technician B says oil with viscosity that is too high may cause lower than specified pressure. Who is correct?

Two technicians are discussing diesel engines. Technician A says all diesel engines are fuel injected. Technician B says glow plugs help ignite the fuel when the engine is cold. Who is correct?

Technician A says weak valve springs can be detected with a vacuum test. Technician B says a restricted exhaust can be detected with a vacuum test. Who is correct?

Which V-type engine valve train design may use four camshafts?

Nearly all engines rotate clockwise (as seen from the flywheel end).

The flywheel stores some of the power produced by the engine during the power stroke to keep the pistons in motion during the exhaust, intake, and compression strokes.

Both valves are closed on the _____ strokes.

The camshaft can be located either in the cylinder block or in the cylinder head.

Describe a mid-engine transverse engine layout.

Engine torque always increases with engine rpm.

Diesel engines are being discussed. Technician A says diesel engines have a distributor-type injection pump. Technician B says diesel engines have a common fuel rail and the injectors are controlled by the computer. Who is correct?

Two technicians are discussing compression testing on a hybrid vehicle equipped with an Atkinson cycle engine. Technician A says the compression reading of an Atkinson cycle engine is normally higher than a conventional engine. Technician B says a scan tool may be needed to perform the compression test. Who is correct?

A ____________________ test is used to detect if all the cylinders are producing the same amount of power

Describe an overhead valve engine.

The rotary engine is also known as a(n) ____________________ engine.

Identify four types of fuel currently used in automotive engines.

What type of ICE engine listed below is commonly found in a hybrid vehicle.

A wet compression test is performed on an engine after a dry compression test revealed low compression on one cylinder. If the compression on the low cylinder rises, it indicates _____.

A cylinder leakage test measures the amount of leakage in the cylinder in ____________________.

The largest part of the engine is the ____________________.