Power Engineering - 4B6 C1&4 Practice Questions With
Complete Solutions
A filter should be backwashed in order to:
a. regenerate the filter
b. dissolve the suspended matter
c. transfer liquid in the opposite direction
d. flush the trapped impurities to waste
e. oxidize the water Correct Answers d. flush the trapped
impurities to waste
A low cost way to remove suspended solids, normally associated
with ground water, is by use of a:
a. hot lime soda softener
b. demineralizer
c. reverse osmosis system
d. settling pond Correct Answers d. settling pond
A measure of the cloudiness of the water is known as:
a. clarity
b. neutrality
c. visibility
d. turbidity Correct Answers d. turbidity
A method of treatment which is often used in conjunction with
settling tanks is
a. lime soda softening
,b. filtration
c. demineralizing
d. zeolite softening
e. deaeration Correct Answers b. filtration
Activated carbon is produced from carbonaceous material such
as:
1. coal
2. wood
3. magnesium
4. coconut shells
5. peat
a. 1, 3, 4, 5
b. 1, 2, 4, 5
c. 1, 2, 3, 5
d. 2, 3, 4, 5
e. 1, 2, 3, 4 Correct Answers b. 1, 2, 4, 5
An activated carbon filter is often used to remove taste or odors
from water but is also used effectively to remove:
a. chlorine
b. carbon dioxide
c. biological impurities
d. oxygen Correct Answers a. chlorine
As prescribed by boiler codes, deaerators must have a:
a. safety valve
b. external vent condenser
,c. overflow control gauge
d. gauge glass Correct Answers a. safety valve
Bicarbonates and carbonates of calcium and magnesium cause
the following condition in a boiler:
a. carryover
b. corrosion
c. scale
d. sludge Correct Answers c. scale
Bicarbonates can be easily removed from the feedwater by:
a. blowing down the boiler
b. using filter tanks
c. heating the water just below its boiling point
d. passing the water through a deaerator
e. adding an additional screen Correct Answers c. heating the
water just below its boiling point
Biological attacks on cooling tower wood mainly occurs as
deterioration of the:
a. fiber
b. lignin
c. linden
d. balsa
e. cellulose Correct Answers e. cellulose
Boiler water is treated in order to:
1. Prevent scale from forming on boiler surfaces
, 2. Prevent corrosion of boiler metal
3. Prevent the pressure in the boiler from going too high
4. Prevent sludge from depositing on boiler surfaces
5. Prevent the gauge glass from giving a false reading
6. Prevent carryover of impurities with the steam
a. 1, 2, 4, 6
b. 2, 4, 5, 6
c. 2, 3, 5, 6
d. 1, 3, 5, 6
e. 1, 3, 4, 5 Correct Answers a. 1, 2, 4, 6
Boiler water with a pH of 6 is considered:
a. neutral
b. alkaline
c. acidic
d. basic Correct Answers c. acidic
Boiler water with an alkalinity that is too high will likely:
a. has lot of scale
b. show signs of pitting
c. foam
d. has grooving on its surfaces
e. has a low pH Correct Answers c. foam
By definition, this is a measure of a solutions ability to resist
changes in pH:
a. solubility
Complete Solutions
A filter should be backwashed in order to:
a. regenerate the filter
b. dissolve the suspended matter
c. transfer liquid in the opposite direction
d. flush the trapped impurities to waste
e. oxidize the water Correct Answers d. flush the trapped
impurities to waste
A low cost way to remove suspended solids, normally associated
with ground water, is by use of a:
a. hot lime soda softener
b. demineralizer
c. reverse osmosis system
d. settling pond Correct Answers d. settling pond
A measure of the cloudiness of the water is known as:
a. clarity
b. neutrality
c. visibility
d. turbidity Correct Answers d. turbidity
A method of treatment which is often used in conjunction with
settling tanks is
a. lime soda softening
,b. filtration
c. demineralizing
d. zeolite softening
e. deaeration Correct Answers b. filtration
Activated carbon is produced from carbonaceous material such
as:
1. coal
2. wood
3. magnesium
4. coconut shells
5. peat
a. 1, 3, 4, 5
b. 1, 2, 4, 5
c. 1, 2, 3, 5
d. 2, 3, 4, 5
e. 1, 2, 3, 4 Correct Answers b. 1, 2, 4, 5
An activated carbon filter is often used to remove taste or odors
from water but is also used effectively to remove:
a. chlorine
b. carbon dioxide
c. biological impurities
d. oxygen Correct Answers a. chlorine
As prescribed by boiler codes, deaerators must have a:
a. safety valve
b. external vent condenser
,c. overflow control gauge
d. gauge glass Correct Answers a. safety valve
Bicarbonates and carbonates of calcium and magnesium cause
the following condition in a boiler:
a. carryover
b. corrosion
c. scale
d. sludge Correct Answers c. scale
Bicarbonates can be easily removed from the feedwater by:
a. blowing down the boiler
b. using filter tanks
c. heating the water just below its boiling point
d. passing the water through a deaerator
e. adding an additional screen Correct Answers c. heating the
water just below its boiling point
Biological attacks on cooling tower wood mainly occurs as
deterioration of the:
a. fiber
b. lignin
c. linden
d. balsa
e. cellulose Correct Answers e. cellulose
Boiler water is treated in order to:
1. Prevent scale from forming on boiler surfaces
, 2. Prevent corrosion of boiler metal
3. Prevent the pressure in the boiler from going too high
4. Prevent sludge from depositing on boiler surfaces
5. Prevent the gauge glass from giving a false reading
6. Prevent carryover of impurities with the steam
a. 1, 2, 4, 6
b. 2, 4, 5, 6
c. 2, 3, 5, 6
d. 1, 3, 5, 6
e. 1, 3, 4, 5 Correct Answers a. 1, 2, 4, 6
Boiler water with a pH of 6 is considered:
a. neutral
b. alkaline
c. acidic
d. basic Correct Answers c. acidic
Boiler water with an alkalinity that is too high will likely:
a. has lot of scale
b. show signs of pitting
c. foam
d. has grooving on its surfaces
e. has a low pH Correct Answers c. foam
By definition, this is a measure of a solutions ability to resist
changes in pH:
a. solubility
