For Question 91 select "B", "C" or "D" ("A" is selected only as an example)!
91. What is one procedure to aid in cooling an engine that is overheating?
A) None of the below. B) Enrichen the fuel mixture. C) Increase the RPM. D) Reduce the airspeed.
92. If the engine oil temperature and cyliner head temperature gauges have exceeded their normal operating range, the pilot may have been operating with:
A) the mixture set too rich. B) higher-than-normal oil pressure. C) too much power and with the mixture set too lean. D) All of the above.
93. During the run-up at a high-elevation airport, a pilot notes a slight engine roughness that is not affected by the magneto check but grows worse during the carburetor heat check. Under these circumstances, what would be the most logical initial action?
A) Check the results obtained with a leaner setting of the mixture. B) Taxi back to the flight line for a maintenance check. C) Reduce manifold pressure to control detonation. D) None of the above.
94. The basic purpose of adjusting the fuel/air mixture at altitude is to:
A) decrease the amount of fuel in the mixture in order to compensate for increased air density. B) decrease the fuel flow in order to compensate for decreased for air density. C) increase the amount of fuel in the mixture to compensate for the decrease in pressure and density of the air. D) All of the above.
95. An abnormally high engine oil temperature indication may be cause by:
A) the oil level being too low. B) operating with a too high viscosity oil. C) operating with an excessivley rich mixture. D) None of the above.
96. A precaution for the operation of an engine equipped with a constant-speed propeller is to:
A) avoid high RPM settings with high manifold pressure. B) avoid high manifold pressure settings with low RPM. C) always use a rich mixture with high RPM settings. D) All of the above.
97. How is engine operation controlled on an engine equipped with a constant-speed propeller?
A) The throttle controls power output as registered on the manifold pressure guage and the propeller control regulates engine RPM. B) The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulaters a constant blade angle. C) The throttle contorls engine RPM as registered on the tachometer and the mixture control regulates the power output. D) None of the above.
98. What effect does high density altitude, as compared to low density altitude, have on propeller efficiency and why?
A) Efficiency is increased due to less friction on the propeller blades. B) Efficiency is reduced because the propeller exerts less force at high density altitudes than at low density altitudes. C) Efficiency is reduced due to the increased force of the propeller in the thinner air. D) All of the above.
99. A slightly high glide slope indication from a precision approach path indicator is:
A) four white lights. B) three white lights and one red light. C) two white lights and two red lights. D) None of the above.
100. An airport's rotating beacon operated during daylight hours indicates:
A) there are obstructions on the airport. B) that weather at the airport located in Class D airspace is below basic VFR weather minimums. C) the Air Traiffic Control tower is not in operation. D) All of the above.