Reading Comprehension Questions
a. add weight to the bicycle.b
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| a. add weight to the bicycle. b. make the tires last longer. c. make the ride less bumpy. d. make the ride less tiring. 374. Read the following sentence from the fourth paragraph: Ten years later, James Starley, an English inventor, made several innovations that revolutionized bicycle design. As it is used in the sentence, the underlined word revolutionized most nearly means a. cancelled. b. changed drastically. c. became outdated. d. exercised control over. 375. Which of the following statements from the passage represents the writer’s opinion? a. The safety bicycle would look familiar to today’s cyclists. b. Two hundred years ago, bicycles didn’t even exist. c. The Michaux brothers called their bicycle a vélocipède. d. Macmillan’s machine had tires with iron rims 7 6 501 Reading Comprehension Questions 6801_501_ReadingCompQuest_4E[fin].indd 176 3/18/10 1:34:57 PM 1 7 One of the most hazardous conditions a firefighter will ever encounter is a backdraft (also known as a smoke explosion. A backdraft can occur in the hot-smoldering phase of afire when burning is incomplete and there is not enough oxygen to sustain the fire. Unburned carbon particles and other flammable products, combined with the intense heat, may cause instantaneous combustion if more oxygen reaches the fire. Firefighters should be aware of the conditions that indicate the possibility fora backdraft to occur. When there is alack of oxygen during afire, the smoke becomes filled with carbon dioxide or carbon monoxide and turns dense gray or black. Other warning signs of a potential backdraft are little or no visible flame, excessive heat, smoke leaving the building in puffs, muffled sounds, and smoke-stained windows. Proper ventilation will make a backdraft less likely. Opening a room or building at the highest point allows heated gases and smoke to be released gradually. However, suddenly breaking a window or opening a door is a mistake, because it allows oxygen to rush in, causing an explosion. 376. A backdraft is a dangerous condition for firefighters mainly because ba. there is not enough oxygen for breathing. Download 3.61 Mb. Share with your friends:
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