Chapter 12 Review

What senses the temperature of the coolant and allows the fluid to enter or exit the radiator? 

• a.       radiator hose

• b.      water pump

• c.       thermostat

• d.      radiator cap

What happens when pressure is increased in the cooling system by using a radiator cap?

• a.       increases the boiling point of the coolant

• b.      decreases the boiling point of the coolant

• c.       keeps the boiling point constant

• d.      changes the water to antifreeze ratio in the coolant

What is used to attach the radiator hose to the radiator? 

• a.       clamp

• b. glue

• c. tape

• d. Machine screw

Approximately what temperature will the antifreeze freeze if mixed 50% water and 50% antifreeze? 

• a.       212ºF (100ºC)

• b.      122ºF (50ºC)

• c.       32ºF (0ºC)

• d.      -34ºF (-37ºC)

Which of the following is like a mini radiator to help with heating the passenger cabin?

• a.       cabin air filter

• b.      heater core

• c.       compressor

• d.      evaporator

What forces the coolant to flow throughout the engine?

• a.       air from the front of the car

• b.      water jacket

• c.       radiator fins

• d.      water pump

What is the purpose of the radiator?    

• a.       remove heat from the coolant

• b.      add heat to the coolant

• c.       slow down the air through the engine compartment

• d.      keep the coolant at 195ºF (91ºC)

Charge-air coolers (intercoolers and aftercoolers) are air-to-air or air-to-liquid ____________.

• a.       heat collectors

• b.      heat exchangers

• c.       cold air returns

• d.      hot air returns

Cooler air is ____________, allowing more air and fuel to go into the combustion chamber which leads to more power.   

• a.       more turbulent

• b.      cloudy

• c.       less dense

• d.      denser

What is the function of active grille shutters?   

• a.       to improve aerodynamic and control airflow through the radiator

• b.      slow down the vehicle

• c.       to shut off air to the passenger’s cabin

• d.      to get the engine coolant as cold as possible