Steam Boilers Module 15 Sessions 1 and 2 Flashcards
1
Q
The comparison, or ratio, of heat supplied in fuel to heat absorbed by water is defined as \_\_\_\_\_\_\_\_\_\_ efficiency. A. Combustion B. Watertube C. Thermal D. Overall plant
A
C. Thermal
2
Q
A low pressure steam boiler has a maximum allowable working pressure (MAWP) of up A. 15 psi B. 35 psi C. 100 psi D. no MAWP
A
A. 15 psi
3
Q
The evaporation of 34.5 lb of Water/hr from and at a feedwater temperature of 212°F is defined as \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. A factor of evaporation B. One boiler horsepower C. Latent heat of fusion D. An evaporation test
A
B. One boiler horsepower
4
Q
A firetube boiler maybe used \_\_\_\_\_\_\_\_\_\_\_\_\_. A. Only in low pressure plants B. Only in high pressure plants C. In high or low pressure plants D. only for process steam
A
C. In high or low pressure plants
5
Q
Because of the large volume of water, the boiler most likely to cause a boiler explosion is \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. A watertube boiler B. A firetube boiler C. Either a watertube or firetube boiler D. Boilers cannot explode
A
B. A firetube boiler
6
Q
As steam pressure in a boiler increases, there is a corresponding increase in the \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. Temperature B. Superheat C. Volume of steam D. Boiler horsepower
A
A. Temperature
7
Q
A sudden drop in boiler steam pressure without a corresponding drop in boiler water temperature could result in a/an \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. Loss of efficiency B. Boiler explosion C. Increase in surface tension D. Decrease in steam volume
A
B. Boiler explosion
8
Q
The part of a boiler that has the heat and gases of combustion on one side and water on the other side is known as the \_\_\_\_\_\_\_\_\_ surface. A. Water B. Steam C. Fire side D. Heating
A
D. Heating
9
Q
Baffles are designed to direct the gases of combustion so that they come into close contact with the \_\_\_\_\_\_\_\_\_\_\_. A. Feedwater B. Combustion chamber C. Superheater D. Boiler heating surface
A
D. Boiler heating surface
10
Q
The steam and water drum of watertube boilers is dished (concave) to eliminate the need for \_\_\_\_\_\_\_\_\_\_\_\_. A. Brickwork B. Waterwalls C. Stays D. Barnes
A
C. Stays
11
Q
To increase the life of a furnace refractory, some watertube boilers are equipped with \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. Waterwall blowdown lines B. Sinuous headers C. Box headers D. Waterwalls
A
D. Waterwalls
12
Q
In a watertube boiler, the heat and gases of combustion pass \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_. A. Through the tubes B. Around the tubes C. Through and around the tubes D. Only through the combustion chamber
A
B. Around the tubes
13
Q
The boiler has a large volume of water in relation to horsepower size. A. Firetube B. Watertube C. Process steam D. Vertical watertube
A
A. Firetube
14
Q
The \_\_\_\_\_\_\_\_\_ boiler was developed to provide steam at higher pressures. A. HRT B. Firetube C. Watertube D. Combination
A
C. Watertube
15
Q
The mud drum is the lowest part of the water side of a(n) \_\_\_\_\_\_\_\_\_ boiler. A. HRT B. Watertube C. Low pressure firetube D. High pressure firetube
A
B. Watertube
