Unit 4 Flashcards
What property of engine drive belts causes you to always replace belts as a set?
Stretch slightly over time
Which component causes the engine to overheat or run cooler than normal if it fails?
Thermostat
What coolant heater has the main advantage of warming the engine in a very short period of time?
Circulating
What do you do if you have any doubt as to whether a hose is good or not?
Replace it
Which coolant heater is installed internally in the engine block in place of a freeze plug?
Immersion
Why do you never turn the power on to the heater until the engine is full of coolant?
It could burn the heater up
Identify the engine component where glow plugs are installed
Intake manifolds
Identify the only safe method of using ether in an engine
Closed dispensing system
What would cause an engine to run below normal operating temperatures?
Thermostat stuck open
What would cause an engine to run above normal operating temperatures?
Thermostat is inoperative
Which component do two stroke engines have that serves the same purpose as the intake manifold of four-stroke engines?
Air box
At what speeds do turbochargers normally rotate?
10,000 to over 100,000 rpm
Identify the component that increases the density of the intake air and permits greater efficiency from the engine?
Intercooler
The exhaust system component that consists of a series of perforated baffles within a cylindrical container is called
Silencer
How is exhaust piping connected?
Welds or clamps
Which intake component directs air into the cylinders?
Intake manifold
Which part of a turbocharger do exhaust gases travel?
Turbine
Which system has leaks that often create a whistling sound?
Intake
Which area is not part of inspecting an intercooler?
Coolant level
In which component might you see leaks because of the carbon-colored discoloration of parts of surfaces adjacent to the leak?
Exhaust manifold
What is a major factor in erosion in the exhaust silencer?
Contamination in the fuel oil
With what do you coat the exhaust gasket to the turbine before you position it on the exhaust manifold flange?
High temperature anti-seize compound
How much coolant must you drain from the cooling system to replace the intercooler?
Below the level of the intercooler
How can you determine correct torque specification can be found when replacing an intake manifold?
Technical Order (TO) or manufacturers’ manual
