Exam 5: Cleaning the Engine

Technician A says ultrasonic cleaning is used by some rebuilders for small parts. Technician B says ultrasonic cleaning is a process used by jewelers and dentists. Who is correct?

What are the three processes (steps) used with oven cleaning?

A base is very acidic. True or false?

Name three advantages of a hot spray tank.

A small wire brush on an electric drill is best used for cleaning aluminum surfaces.

Technician A says baking soda is now being used in blast cleaning. Technician B says some ring manufacturers blame glass bead cleaning for ring failure. Who is correct?

Technician A says to use a coarse sandpaper when cleaning bimetal engines with super-smooth cast iron block surfaces. Technician B says a sharp gasket scraper is recommended for use on machined aluminum. Who is correct?

Technician A says that steel shot blasting is commonly used to clean ferrous parts. Technician B says that steel shot blasting is commonly used to clean aluminum parts. Who is right?

Two types of thermal cleaning ovens are _____ and open flame.

Technician A says to clean an aluminum engine in an alkaline solution for best results. Technician B says for best results, disassemble the heads before hot tanking. Which technician is right?

Technician A says that steam cleaning and pressure washing are common methods of cleaning internal engine parts. Technician B says that steam cleaning is safe to use with electrical components. Who is right?

How would you remove a severe case of scale buildup in an engine you are rebuilding?

Two technicians are discussing shot peening. Technician A says that larger shot hits a part with more impact. Technician B says that parts can be made stronger by shot peening. Who is right?

Heated alkaline materials cut grease very well.

Technician A says carbon-removal additives are work well when added prior to removing the engine. Technician B says carbon-removal additives should be used only in a well-ventilated area. Who is right?

Technician A says a hot spray washer is sometimes called a jet washer. Technician B says an advantage of a spray washer is that it cleans oil galleries as well as a hot soak tank. Who is right?

What is another name for the airless blaster?

Technician A says shot blasting is becoming more popular due to environmental concerns about other cleaning methods. Technician B says shot sizes are rated 00 to 110. Who is correct?

What is another name for a bake oven?

One of the newer blast cleaning methods uses baking soda.