auto final exam (all solved)

which part is the cylinder head bolted to? correct answers the block What is the ratio of coolant to water in a typical automotive cooling system? correct answers 50:50 Which material are new model cylinder heads made from? correct answers aluminum Who issues technical service bulletins? correct answers manufacturers If blue smoke is seen at the tailpipe when an engine is started, which part(s) is/are most likely worn out? correct answers valve stem seals Technician A says a water pump controls the flow of coolant through an engine. Technician B says an oil filter controls the flow of oil through an engine. Who is right? correct answers neither Technician A says that all vehicles use the same oil viscosity. Technician B says that using the wrong viscosity oil can damage an engine. Which is right? correct answers technician b Where would an engine thermostat most likely be found? correct answers at the engine end of the upper radiator hose If the coolant recovery tank has a hole in it, which is the proper fix? correct answers replace the tank Which item is designed to keep engine valves closed? correct answers spring/return spring When changing the engine oil, what should the temperature of the engine be? correct answers warm What is the minimum recommended time to drain an oil filter before discarding? correct answers 12 hours minimum but usually 24 hours What is a safety concern when servicing the internal combustion engine of a hybrid vehicle? correct answers High voltage/electrocution Which is the necessary procedure when the heater core is leaking coolant? correct answers Remove and replace the heater core Which part in the cooling system controls the flow of coolant? correct answers thermostat A green liquid is found under the front of a vehicle. Which fluid is most likely leaking? correct answers antifreeze