I Gotcha

1.               Technician A says: In extreme cold conditions, a 90-10 antifreeze-to-water mix is recommended.

Technician B says: A 90-10 antifreeze-to-water mix may cause overheating.

Who is correct?

• A

• B

• BOTH

• NEITHER

1.               When the cooling system is operating at high load and high heat, the vacuum valve is?

• open
• malfunctioning
• partially open
• closed

1.               The radiator illustrated is which type of radiator?

• Oil-filled radiator
•   Cross Flow

• Panel radiator
• Electric radiator

1.               What type of heat transfer happens with coolant?

• Evaporation
• Conduction
• Radiation
• Convection

1.               As coolant temperature ___________, the coolant expands and pressure in the radiator rises, and that raises the boiling point of the water.

• Increases
• Has no effect
• Stays the same
• Decreases

1.               Technician A says: Cooling system thermostats control cooling system temperature.

Technician B says: Some cooling systems use two thermostats. A main thermostat and a by-pass thermostat.

Who is Correct?

• Technician B
• Both Technicians
• Neither Technician
• Technician A

1.               A radiator cap contains:

• Water pump and radiator
• Thermostat and hose
• Coolant and fan
• Pressure relief valve and sealing gasket

1.               Technician A says: The thermostat is located in the lower radiator hose to control coolant flow to the engine.

Technician B says: The thermostat sensing pellet is installed toward the engine.

Who is correct?

• Technician A
• Technician B
• Both technicians
• Neither technician

1.               The first law of thermal dynamics states that heat cannot be created OR destroyed.

• False
• True
• Heat can be destroyed but not created
• Heat can be created but not destroyed

1.               Defrost utilizes what systems?

• Refrigeration system and ventilation system
• Cooling system and exhaust system
• Insulation system and plumbing system
• Heating system and air conditioning system