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A crossflow radiator: Select one: a. Has a tank at either side of the core b. Operates in the same way as a downflow radiator c. Allows a lower car hood line d. All of the above - correct answers d. All of the above A radiator cap contains: Select one: a. A pressure valve b. A vacuum valve c. Botha and b d. Neither a nor b - correct answers c. Both a and b At low engine speeds, a variable-pitch fan blade is: Select one: a. Flattened b. Sharply angled c. Pulling less air d. None of the above - correct answers b. Sharply angled Coolant recovery systems: Select one: a. Increase cooling system efficiency b. Use pressure caps that don't vent to the atmosphere c. Always maintain a full cooling system d. All of the above - correct answers d. All of the above Cooling systems are pressurized to: Select one: a. Prevent the coolant from rusting the engine metal b. Make water pump lubrication unnecessary c. Raise the coolant's boiling point d. None of the above - correct answers c. Raise the coolant's boiling point Late-model thermostats are operated by: Select one: a. Athermo-siphon b. A wax pellet c. A bimetal temperature sensor d. Any of the above - correct answers b. A wax pellet Modern engines use a coolant that is: Select one: a. 100 percent water b. About 50 percent water, 50 percent alcohol c. About 20 percent water, 80 percent ethylene-glycol d. None of the above - correct answers d. None of the above Radiator hoses can be: Select one: a. Molded ina specific shape b. Ribbed, flexible lengths d. None of the above - correct answers a. Fast When you work on an engine that has an electric radiator fan, you should before you get near the fan. Select one: a. Install a shroud b. Disconnect the battery positive cable c. Bring the engine to its normal operating temperature d. Disconnect the battery ground cable - correct answers d. Disconnect the battery ground cable Which of the following is not part of the radiator? Select one: a. Tubes b. Core plugs c. Fins d. Tanks - correct answers b. Core plugs is stamped on the outside of a replacement thermostat. Select one: a. The engine displacement b. "Wax" c. The opening temperature d. The direction of installation - correct answers c. The opening temperature About two-thirds of the heat energy from combustion is converted to mechanical energy. Select one: True False - correct answers False Core, or freeze, plugs protect an engine from the damage which can occur if the coolant mixture should freeze. Select one: True False - correct answers False Each 1-psi (7-kPa) increase in cooling system pressure raises the coolant's boiling point by about 3 Deg. F (2 Deg. C). Select one: True False - correct answers True Earlier engines tend to run colder than late model engines. Select one: True False - correct answers True Electric radiator fans cannot run when the vehicle's ignition is off. Select one: True False - correct answers False Flexible fan blades are designed to conserve engine power. Select one: True False - correct answers True Having more than 50 percent ethylene-glycol in a coolant mixture will raise rather than lower the freezing point. Select one: The thermostat is mounted in the top or side of the radiator tank. Select one: True False - correct answers False Wax-actuated thermostats do not operate reliably under varying cooling system pressures. Select one: True False - correct answers False When a fluid drive fan is hot, there is very little silicone present in the drive. Select one: True False - correct answers False 
