please answer all correct.

QUESTION 1 Hypoxic hypoxia results from a. a lower percentage of oxygen at high altitudes b. anemia O c excessive Gload O d. reduction in the partial pressure of oxygen QUESTION 2 The time of useful consciousness at 25,000 feet is O a. 30 seconds O b. 2 minutes OG 3-5 minutes O d. depends on the individual -songe over 30 minutes QUESTION 3 How can a bad cold affect your sinuses in flight? a. congestion can cause a sinus block b. sinus blocks are not painful C you can get post-nasal drip d. oral decongestants don't impair performance QUESTION 4 A medical certificate may not be issued without a "special issuance" if you have a history or diagnosis of a. bipolar disorder Ob. 20-30 vision O c flat feet O d. bird flu QUESTION 5 A vestibular illusion called the "leans" results from a. leaning over to pick up a pencil b. sudden return to level flight after a slow turn Oc the fact that the semicircular canals cannot sense rotational acceleration less than 2 degrees per second d. a rapid acceleration QUESTION 6 Two characteristics can create the illusion of being low on approach: a narrower than normal runway b.wider than normal runway Ocupsloping runway d.downsloping runway QUESTION 7 The following are sources of carbon monoxide poisoning a. tobacco smoke b. aircraft heater vents Oc aircraft exhaust system leaks d. dry ice QUESTION 8 The following is true about acute fatigue: a training and experience can overcome the effects of fatigue b.proper diet can alleviate chronic fatigue cone effect of acute fatigue is timing disruption O d. generalized aches and pains can result from acut fatigue QUESTION 9 The following statements about drugs are either true or false. Select the true statement. a. aspirin, tylenol and Advil have few side effects b. Darvon, percodan, demerol and codeine have no significant side effects. c. most local dental anesthesias do not wear off in a short time. O d. 14 CFR 91.17 does not prohibit drug use. QUESTION 10 A pilot flying at night sees a light in the sky which appears to be moving. This could be an illusion called: O a. fixation b.flicker vertigo O c autokinesis d. reversible perspective