A propylene glycol anti-freeze concentration of 60% volume produces a freeze point protection of __________.

• 19°F

• -27°F

• -76°F

• -56°F

Which additive in coolant is the most effective at preventing cavitation?

• Distilled water

• Glycol

• Nitrate

• Silicate

The boiling point of water in a cooling system is increased by 1 degree Fahrenheit for every ________ increase in pressure.

• 4psi

• 3psi

• 2psi

• 1psi

What temperature will oil begin to oxidize and could even burn?

• 225°F (107°C)

• 250°F (121°C)

• 275°F (135°C)

• 290°F (143°C)

A water cooled EGR valve would do which of these to your cooling system?

• Lower coolant temperatures because of expanding gasses causing adiabatic cooling

• More soot in your cooling system, necessitating a water system filter

• Put more stain on the cooling system since it has to cool down even more

• A smaller cooling system capacity

Which of these would you use to make a cooling system that can handle more heat?

• Larger water pump

• Addition of cooling fans

• Radiator cross sectional areas

• All of these help to handle high heat loads

Which coolant is environmentally friendly?

• Electrolyte

• Propylene glycol

• Ethylene glycol

• None of these is correct

Why would you use distilled water in your cooling system over plain tap water?

• distilled water has lots of minerals that can help with cooling

• Distilled has no minerals in it.

• Free, because distilled water comes from the tap

• Distilled water has a higher boiling temp

Heavy duty and automotive diesels efficiency rely almost exclusively on which system?

• The cooling system

• The fuel injection system

• The turbo

• The DPF

What is the primary way that heavy duty diesels remove heat?

• Air flow

• A water and coolant mix

• Exhaust

• Oil