Chapter 2

Question 1

182. A particular application of the once through Boiler design is the steam flooding Boiler. This is a Boiler used for flooding oil wells with steam in order to increase the oil recovery.

A) true
B) false

Answer 1

A) true

Question 2

183. Steam injection is a procedure for increasing the the oil from wells, which have been _____ depleted.

A) completely
B) partially
C) entirely
D) almost

Answer 2

B) partially

Question 3

184. The reason for the use of steam is to allow the maximum quantity of heat to be put into the well with the _____ quantity of injected fluid

A) minimum
B) maximum
C) most
D) super

Answer 3

A) minimum

Question 4

185. In order to keep the salts in the Boiler water dissolved, and to avoid deposits on the tubes, the steam produced contains _____ moisture.

A) 15%
B) 30%
C) 20%
D) 50%

Answer 4

C) 20%

Question 5

186. Outputs from steam flooding boilers range from _____ million kJ/h to _____ million kJ/h in standard sizes.

A) 1, 100
B) 5, 50
C) 100, 200
D) 1, 50

Answer 5

B) 5, 50

Question 6

187. One method of burning _____ is called fluidized bed combustion.

A) liquids
B) wood
C) methane
D) coal

Answer 6

D) coal

Question 7

188. Crushed coal from 1.6 mm to 6 mm is injected into the bed by means of an _____.

A) elevator
B) air stream
C) injector
D) pulverizer

Answer 7

B) air stream

Question 8

189. Combustion air is introduced underneath the bed and is blown through the entire bed.

A) true
B) false

Answer 8

A) true

Question 9

190. Fluidized bed boilers have the ability to burn _____ fuels in an environmentally acceptable manner.

A) low grade
B) high grade
C) liquid
D) vaporized

Answer 9

A) low grade

Question 10

191. Combustion can take place at temperatures ranging from _____ to _____ instead of normal combustion temperatures of 1600 C to 1900 C for pulverized coal and oil firing.

A) 300,500
B) 200,400
C) 800,900
D) 600,700

Answer 10

C) 800,900

Question 11

192. Because of the low operating temperatures, an inexpensive material such as CaCO3 (lime) can be added to the bed. It acts as absorbent to remove _____ from the flue gas.

A) SO2
B) O2
C) NOx
D) water

Answer 11

A) SO2

Question 12

193. Bubbling fluid bed boilers are subject to _____ erosion rates.

A) low
B) moderate
C) extreme
D) high

Answer 12

D) high

Question 13

194. The concept of using waste energy to generate steam has been gaining in popularity. This is mainly because of _____ fuel costs.

A) lower
B) moderate
C) higher
D) more

Answer 13

C) higher.

Question 14

195. A simple combined cycle power generation system can consist of:

A) a single gas turbine generator
B) a HRSG
C) a single steam turbine generator
D) condenser
E) all of the above

Answer 14

E) all of the above

Question 15

196. The HRSG has supplemental firing in the form of duct burners. These are coal fired and are used to add additional heat to the boilers.

A) true
B) false

Answer 15

B) false

Question 16

197. The main application for _____ boilers is steam generation using gas turbine exhaust gas as a heat source.

A) fluidized bed
B) HRSG
C) once through
D) steam flooding

Answer 16

B) HRSG

Question 17

198. The kraft process uses sodium sulfide (NaSO4) as a makeup chemical.

A) true
B) false

Answer 17

B) false

Question 18

199. In the black liquor process combustion air is fed at three elevations of the furnace: primary, secondary, and _____.

A) upper
B) lower
C) tertiary
D) after

Answer 18

C) tertiary

Question 19

200. The black liquor droplets must be _____ enough to minimize entrainment in the combustion gases.

A) small
B) large
C) dispersed
D) fine

Answer 19

B) large

Question 20

201. The primary function of the recovery Boiler is to process _____ liquor.

A) white
B) green
C) black
D) liquor

Answer 20

C) black

Question 21

202. List the five functions of the auxiliary fuel burners:
     1) raise steam during startup
     2) sustain a stable ignition while establishing a char bed
     3) stabilize conditions during upsets in the black liquor feed
     4) produce extra steam as required by the process of power production
     5) burn out the char bed when shutting down
     6) maintain furnace temperatures

A) 1,2,3,4,5
B) 3,4,5,6
C) 1,3,5
D) 1,2,3,4,6

Answer 21

A) 1,2,3,4,5

Question 22

203. If water contacts molten smelt, a violent explosion will result. It is not a _____ reaction, but a _____ reaction.

A) chemical, physical
B) physical, chemical
C) violent, mild
D) small, large

Answer 22

A) chemical, physical

Question 23

204. If the black liquor is too _____, it too can result in an explosion.

A) strong
B) thin
C) weak
D) thick

Answer 23

C) weak

Question 24

205. Heat recovery started to be added to the refuse incinerators, as did strict air pollution guidelines. The basic incinerators with waste heat recovery have evolved into _____ boilers with integral stokers.

A) packaged
B) fire tubed
C) open hearth
D) water wall

Answer 24

D) water wall

Question 25

206. The combustion products from burning municipal waste are very _____. A) hot B) corrosive C) many D) wet

Answer 25

B) corrosive

Question 26

207. There is also corrosion caused by _____ in refuse fired boilers. A) chlorides B) fuels C) materials D) burning

Answer 26

A) chlorides

Question 27

208. The higher the tube metal temperature, the _____ the degree of tube metal loss. A) less B) greater C) minimum D) smaller

Answer 27

B) greater

Question 28

209. Corrosion of the _____ furnace area of the Boiler can be severe during refuse firing. A) upper B) middle C) lower D) recovery

Answer 28

C) lower

Question 29

210. Inconel is an alloy composed mostly of _____ and aluminum. A) lead B) copper C) steel D) nickel

Answer 29

D) nickel

Question 30

211. Biomass is anything that is or recently was alive, such as leaves, grasses, bamboo, vine clippings, sugar cane, coffee grounds, and rice hulls. A) true B) false

Answer 30

A) true

Question 31

212. Systems to burn wood and biomass usually involve a separate _____, called. Dutch oven, or a traveling grate or vibrating grate arrangement. A) oven B) furnace C) collection D) burner

Answer 31

B) furnace

Question 32

213. The pinhole grates have _____ air holes to admit air to the burning material on the grate. A) Venturi type B) square C) round D) large

Answer 32

A) Venturi type

Question 33

214. The vibrating grate systems, have grate bars attached to a frame that _____ to remove the ash. A) rotate B) move C) vibrate D) turn

Answer 33

C) vibrate

Question 34

215. The vibration also serves to aid combustion by _____ out the bed of burning biomass. A) shaking B) levelling C) turning D) moving

Answer 34

B) levelling