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 5-12 What should be done when adding grease to a pump's ball bearing assembly?
a) Confirm the relief plug is closed and pack the bearings tightly
b) Remove the relief plug and add grease until it just starts to come out of the
plug
c) Remove the relief plug and add grease until it pushes out all the old grease
d) Add grease, then "top off" with oil
5-13 How can a stuck Taco 006 pump be started?
a)
Remove shaft plug and turn with a screwdriver
b)
Turn the power on and off rapidly
c)
Momentarily apply 240 volts to the motor
d)
Tap the body with a hammer handle
5-14 Which of these is a good non-toxic descaling material?
a)
Phosphoric acid
b)
Muriatic acid
c)
Sulfuric acid
d)
Soda ash
5-15 What is the maximum percentage of heat exchanger tubes that can be repaired
by plugging without significantly affecting the heat exchanger's performance?
a) 5%
b) 10%
c) 15%
d) 20%
5-16 Which of these fluid's loops can be flushed with tap water?
a)
Propylene glycol
b)
Synthetic oil
c)
Silicone oil
d)
Brayco 888
5-17 What should be the air pressure on a diaphragm-type expansion tank at sea
level ?
a)
20
PSI
b)
30
PSI
c)
40
PSI
d)
50
PSI
REPAIR
5.4 QUESTIONS FOR SELF-STUDY
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