5-50. What is the most urgently needed
substance to sustain human life?
1.
FOOd
2.
Oxygen
3.
Water
4.
Clothing
5-51. Sea level air pressure is how
much greater than air pressure at
18,000 feet?
1. One and one-half times
2. Twice
3. Three times
4. Three and one-half times
5-52. What type of oxygen equipment is
required on aircraft capable of
flying in the 35,000 to 43,000
feet altitude ranges?
1.
Demand type
2.
Pressure type
3.
Pressure demand type
4.
Demand pressure type
5-53. What kind of oxygen is type 1?
1.
Liquid oxygen for technical
uses
2.
Gaseous oxygen for technical
uses
3.
Gaseous oxygen for aviator’s
breathing purposes
4.
Liquid oxygen for aviator’s
breathing purposes
5-54. What type of oxygen is type II
oxygen, Spec. MIL-O-2720D?
1.
Liquid oxygen for technical
purposes
2.
Liquid oxygen for aviator’s
breathing purposes
3.
Gaseous oxygen for technical
purposes
4.
Gaseous oxygen for aviator’s
breathing purposes
5-55. Water vapor content is specified
for breathing oxygen in order to
prevent which of the following
problems?
1.
Clogging of the oxygen system
with ice
2.
Rust from forming in the
oxygen system
3.
Excessive humidity in the
lungs
4.
Physical injury to the body
36
5-56. What is the natural state of
oxygen?
1.
Solid
2.
Liquid
3.
Gel
4.
Gas
5-57. Oxygen forms what percent by
volume of the total composition
of the atmosphere?
1.
12%
2.
21%
3.
52%
4.
78%
5-58. What is the most plentiful
element in our environment?
1.
Chlorine
2.
Argon
3.
Nitrogen
4.
Oxygen
5-59. Which of the following are
characteristics of oxygen?
1.
Weightless, colorless, and
tasteless
2.
Tasteless, valueless, and
odorless
3.
Colorless, odorless, and
tasteless
4.
Volumeless5 weightless, and
colorless
5-60. The most rapid oxidation is found
in which of the following
processes?
1.
Rust
2.
Combustion
3.
Evaporation
4.
Liquefaction
5-61. Oxygen is found in which of the
following chemical states?
1.
Gas or solid only
2.
Gas or liquid only
3.
Liquid or solid only
4.
Gas, liquid, or solid
6-62. One gallon of liquid oxygen
weighs how many pounds?
1. 6.00 pounds
2. 8.49 pounds
3. 9.52 pounds
4. 16.00 pounds
