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 TB 600-1
d.
Lower 10
F
11. What is the purpose of the back pressure regulating valve (BPRV)?
a.
Prevent pressure from backing up.
b.
Insure proper condensate removal.
c.
Prevent excessive pressure buildup.
d.
Insure flash back extermination.
a.
15-30.
b.
20-30.
c.
20-40.
d.
25-40.
a.
Clogged air filter.
b.
Receiver drain valve open..
c.
Defective Mercoid Switch.
d.
Bristol control orifice clogged.
14. The blower In the heat exchanger circulates the air Inside the trailer to keep acetylene gas from ac
cumulating. It also serves the purpose of:
a.
Cooling the water In the pump.
b.
Reducing the time element.
c.
Providing for continuous flow of water.
d.
Evaporating water on coils.
15. What type of construction is the Residue Drain Valve Controller?
a.
Differential diaphragm.
b.
Spring loaded disc.
c.
Ball spring check.
d.
Electro-magnetic.
a.
Water.
b.
Air.
c.
Diaphragm.
d.
Spring.
17. Why are two hoppers used in the production of acetylene rather than one?
a.
Amount of carbide necessary.
b.
Increase production.
c.
Safety precautions.
d.
Continuous production.
18. What is the minimum number of 225 cu ft cylinders which should be placed on the manifold before the
acetylene generator is started?
a.
8.
b.
10.
c.
12.
d.
14.
19. What is the purpose of the pulsator assembly?
a.
Agitates the carbide water mixture.
b.
Regulates the carbide flow to the generator.
c.
Prevents carbide from bridging the gap between the feed valve and seat.
d.
Provides pressure for operation of the tank check valve.
20. When is the exchanger blower used?
a.
Constantly during production.
b.
Periodically during production.
c.
During purging periods only.
d.
Only when water cooling is needed.
21. If the alarm bell has sounded and both pressure gauges on the air lines to the alarm switch read 15 psi, the
trouble is:
a.
High water level.
b.
Low water level.
c.
High temperature
D-3
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