3B2 Ch 3 Flashcards
What are the main dangers that a condenser must be guarded against?
1. Superheated steam
2. Contamination of condensate
3. Increase in backpressure
4. Vibration
Select one:
a.
1, 2
b.
2, 3
c.
3, 4
d.
1, 2, 3
e.
2, 3, 4
b.
2, 3
In a two-stage air ejector for a surface condenser, the pressure of the first stage ejector cooler is _____ atmospheric pressure but above _____ pressure.
1. Above
2. Ejector
3. Condenser
4. Below
5. Steam
Select one:
a.
1, 2
b.
1, 3
c.
4, 2
d.
4, 3
e.
1, 5
d.
4, 3
The cooling medium for surface condensers may include which of the following?
1. Water from a river
2. Air
3. Water from a cooling tower
4. Refrigerant systems
Select one:
a.
1, 2
b.
3, 4
c.
1, 2, 3
d.
2, 3, 4
e.
1, 2, 3, 4
c.
1, 2, 3
Which methods are used to detect cooling-water leaks in a surface condenser while it is in operation?
1. A pH test
2. Electrical conductivity test
3. Plastic wrapping test
4. Silver nitrate test
5. Fluorescein dye test
Select one:
a.
2, 4
b.
1, 2, 5
c.
2, 3, 4
d.
1, 3
e.
3, 4
a.
2, 4
Water boxes are typically made of which material?
Select one:
a.
Admiralty brass
b.
Cast iron
c.
Muntz metal
d.
Low carbon steel
e.
Steel alloy
b.
Cast iron
What type of extraction pump is often used to reduce cavitation?
Select one:
a.
A pump with high net positive suction head
b.
A double acting reciprocating pump
c.
A vertical well type pump
d.
A positive displacement pump with a separate suction chamber
e.
A single stage centrifugal pump
c.
A vertical well type pump
The condensate extraction pump suction operates at pressures:
Select one:
a.
Slightly above atmospheric
b.
Just below atmospheric
c.
Near absolute zero
d.
Determined by the level of condensate in the condenser
e.
Equal to two atmospheres
c.
Near absolute zero
Water-cooled surface condensers may be classified as which of the following?
1. Radial flow
2. Cross flow
3. Central flow
4. Downflow
Select one:
a.
1, 2
b.
2, 4
c.
1, 2, 3
d.
1, 3, 4
e.
2, 3, 4
d.
1, 3, 4
B2C03Q06 The cooling air is provided by the __________, which forces atmospheric air over the outside of the tubes to lower the temperature of the cooling water.
Select one:
a.
Air blower
b.
Aerial fan blades
c.
Gas turbine
d.
Balanced draft fan
b.
Aerial fan blades
B2C03Q05 Which of the following is not a potential disadvantage of the open-condenser cooling-water system?
Select one:
a.
Drought
b.
Water quality
c.
Natural water resource
d.
Flooding
c.
Natural water resource
What is used as the cooling water for the air ejectors on a surface condenser?
Select one:
a.
Raw water
b.
Treated water
c.
Condensate
d.
River water
e.
Distilled water
c.
Condensate
