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
16
Q
Boiler plates and stay bolts are subjected to \_\_\_\_\_\_\_\_ stress. A. Tensile B. Compressive C. Shear D. Overload
A
A. Tensile
17
Q
Safety valve connections must be approved by the __________.
A. Fire department
B. Shift foreman
C. American Society of Mechanical Engineers (ASME)
D. American Boiler Manufacturers Association (ABMA)
A
C. American Society of Mechanical Engineers (ASME)
18
Q
The only limitations of packaged boilers are the pounds of steam per hour capability and the size of the \_\_\_\_\_\_\_\_ boiler unit. A. Packaged B. Field-erected C. Electric D. Compact
A
A. Packaged
19
Q
Field-erected boilers are used to generate \_\_\_\_\_\_\_\_\_\_. A. Electricity B. Water C. Steam D. Energy
A
A. Electricity
20
Q
Field-erected boilers are used to generate large amounts of \_\_\_\_\_\_\_. A. Steam B. Energy C. Particles D. Clean air
A
A. Steam
21
Q
Field-erected boilers are erected \_\_\_\_\_\_\_\_\_\_. A. On-site B. At the manufacturer C. Out-of-house D. Often away from the plant
A
A. On-site
22
Q
Electric boilers create heat by \_\_\_\_\_\_\_\_\_\_\_\_. A. Electrodes B. Oil C. Gas D. Coal
A
A. Electrodes
23
Q
In which of the following boiler types is heat generated by electric current flowing from one electrode to another electrode through the boiler water? A. Packaged B. Electric C. Gas D. Coal
A
B. Electric
24
Q
In an electric boiler, the \_\_\_\_\_\_\_\_\_ of the boiler water will affect the flow of electricity and the amount of heat generated. A. Conductivity B. Polarity C. Density D. Flow
A
A. Conductivity
