applicable m a n u f a c t u r e r 's o r o t h e r t e c h n i c a l
Q5-7. Which of the following mixtures of ethylene
glycol and water provides the engine with the
publications.
maximum freezing protection?
Q5-1. Which of the following components is NOT a
1. 50-percent water and 50-percent ethylene
component of an air-cooling system?
glycol
1.
A shroud
2. 30-percent water and 70-percent ethylene
2.
A fins
glycol
3.
A baffles
3. 40-percent ethylene glycol and 60-percent
4.
A blower
water
4. 60-percent ethylene glycol and 40-percent
Q5-2. Which of the following components of a
water
cooling system directs the flow of air over the
engine to increase cooling efficiency?
Q5-8. When you perform a 0F accuracy test on a
hydrometer, which of the following ethylene
1.
The radiator
glycol and water mixtures should you use?
2.
The fan
1. One part ethylene glycol and one part
3.
The shroud
water
4.
The fins
2. Two parts ethylene glycol and one part
Q5-3. An inner core is placed in a radiator on
water
vehicles that contain which of the following
3. One part ethylene glycol and two parts
components?
water
1.
A diesel engine
4. Two parts ethylene glycol and three parts
2.
An automatic transmission
water
3.
A gasoline engine
4.
A turbocharger
ENGINE LUBRICATION SYSTEMS
Q5-4. How many valves does a radiator pressure
cap have?
LEARNING OBJECTIVES: Identify the
components of gasoline and diesel engine
1.
One
lubrication systems. Identify procedures for
2.
Two
inspecting, testing, and repairing lubrication
3.
Three
system components. Identify troubleshooting
4.
Four
procedures for gasoline and diesel lubrication
Q5-5. Which of the following components is located
systems. Identify procedures for repairing,
in the cylinder head outlet and designed to
removing, and replacing lubrication system
restrict coolant circulation?
components.
1.
A thermostat
Almost all internal combustion engines are
2.
A radiator
equipped with an internal lubrication system. Without
3.
A check valve
lubrication, an engine would quickly overheat, and its
4.
A water jacket
working parts would seize or stick because of
Q5-6. To supplement the action of the thermostat
excessive friction. All the moving parts must be
and provide faster warm-up, stationary
adequately lubricated to assure minimum wear and
engines and large equipment are equipped
long engine life.
with which of the following components?
1.
A baffle
PURPOSES OF LUBRICATION
2.
A shutter
3.
A restriction orifices
The primary function of engine lubrication is to
4.
An auxiliary water pump
reduce friction between moving parts. Lubrication
5-15
