11 A light yellow carbon monoxide detector will change to i

11. A light yellow carbon monoxide detector will change to _______ if CO is present.
A. dark green    C. brown
B. orange    D. black

A&P airfram 15

Please provide explanations or reason for the answer

12. An aircraft air-conditioning system can permissibly leak
A. 0.5 ounces per month.               C. 1 ounce per year.
B. 1 ounce per month. D. 5 ounces per year.

13. Fuel tanks should have what amount of expansion space that can not be filled with fuel?
A. 1%                 C. 4%
B. 2%    D. 5%

14. The partial pressure of oxygen
A. does not greatly change with altitude.
B. is higher at higher altitudes.
C. is responsible for about 50% of total air pressure.
D. is the main cause of hypoxia.

15. Fuel ejector systems supply additional fuel to the collector can by means of
A. centrifugal boost pumps.                     C. pulsating electric pumps.
B. vane-type pumps. D. venturi action.

16. An example of a fuel “surfactant” is
A. soap. C. water droplets.
B. microorganisms. D. kerosene.

18. In the current colour-code system, fuel with the same antiknock property as pure iso-octane
gasoline would be
A. purple. C. red.
B. green. D. orange.

Solution

11. black colour as more the co present more it will dark as the pad supplies on sensor will change colour.

16. Soap

15 venturi action

18 Green

14 is the main cause of hypoxima