In a boiler room there is an HRT boiler with the following dimensions: the
drum is 96 inches in diameter and 36 ft long; there are a total of 90 tubes,
4 inches in diameter,; and the boiler shell is bricked 1/3 of the distance
from above.
What is the total heating surface of the tube sheets, in square feet?
Select one:
a. 84.78 FIND OUT WHY
a. 84.78 Correct
b. 101.87
c. 74.80
d. 95.31
, When performing an inspection of the internal structure inside the steam
and water drum during annual maintenance on a water tube boiler, what
are the necessary precautions?
Select one:
d. open the firesides and remove the
burners
a. lock and tag the safety valve
b. follow confined space entry procedures
c. open the bottom blowdown lines to prevent backflow
d. open the firesides and remove the burners
, Why is it necessary to keep a water seal on the atmospheric relief valve?
Select one:
a. to prevent air from entering the
a. to prevent air from entering the condenser
condenser
b. stop steam from blowing out of the turbine
c. prevent particulates from entering the turbine
d. stop steam from entering the turbine
What is the quantity of heat needed to raise 40 pounds of air from 60
degrees F to 550 degrees F?
Select one:
Q=MC(T2-T1)
Q=MC air(T2-T1)
Q=40.24550-40
a. 2,326 Btu
Q=40.24490
Q=4704 BTU
b. 5,415 Btu
c. 4,704
d. 504 Btu
, Which of the following is not a type of coal?
Select one:
d. carbonite a. lignite
b. anthracite
c. sub-bituminous
d. carbonite
drum is 96 inches in diameter and 36 ft long; there are a total of 90 tubes,
4 inches in diameter,; and the boiler shell is bricked 1/3 of the distance
from above.
What is the total heating surface of the tube sheets, in square feet?
Select one:
a. 84.78 FIND OUT WHY
a. 84.78 Correct
b. 101.87
c. 74.80
d. 95.31
, When performing an inspection of the internal structure inside the steam
and water drum during annual maintenance on a water tube boiler, what
are the necessary precautions?
Select one:
d. open the firesides and remove the
burners
a. lock and tag the safety valve
b. follow confined space entry procedures
c. open the bottom blowdown lines to prevent backflow
d. open the firesides and remove the burners
, Why is it necessary to keep a water seal on the atmospheric relief valve?
Select one:
a. to prevent air from entering the
a. to prevent air from entering the condenser
condenser
b. stop steam from blowing out of the turbine
c. prevent particulates from entering the turbine
d. stop steam from entering the turbine
What is the quantity of heat needed to raise 40 pounds of air from 60
degrees F to 550 degrees F?
Select one:
Q=MC(T2-T1)
Q=MC air(T2-T1)
Q=40.24550-40
a. 2,326 Btu
Q=40.24490
Q=4704 BTU
b. 5,415 Btu
c. 4,704
d. 504 Btu
, Which of the following is not a type of coal?
Select one:
d. carbonite a. lignite
b. anthracite
c. sub-bituminous
d. carbonite
