1. At what minimum speed (rounded off) could dynamic hydroplaning occur on main tires having a pressure of 121 PSI?

90 knots.
96 knots.
110 knots.

2. At what minimum speed will dynamic hydroplaning begin if a tire has an air pressure of 70 PSI?

85 knots.
80 knots.
75 knots.

3. What is the best method of speed reduction if hydroplaning is experienced on landing?

Apply full main wheel braking only.
Apply nosewheel and main wheel braking alternately and abruptly.
Apply aerodynamic braking to the fullest advantage.

4. Compared to dynamic hydroplaning, at what speed does viscous hydroplaning occur when landing on a smooth, wet runway?

At approximately 2.0 times the speed that dynamic hydroplaning occurs.
At a lower speed than dynamic hydroplaning.
At the same speed as dynamic hydroplaning.

5. What effect, if any, will landing at a higher-than- recommended touchdown speed have on hydroplaning?

No effect on hydroplaning, but increases landing roll.
Reduces hydroplaning potential if heavy braking is applied.
Increases hydroplaning potential regardless of braking.

6. Which place in the turbojet engine is subjected to the highest temperature?

Compressor discharge.
Fuel spray nozzles.
Turbine inlet.

7. What effect would a change in ambient temperature or air density have on gas-turbine-engine performance?

As air density decreases, thrust increases.
As temperature increases, thrust increases.
As temperature increases, thrust decreases.

8. The most important restriction to the operation of turbojet or turboprop engines is

limiting compressor speed.
limiting exhaust gas temperature.
Limiting torque.

9. As outside air pressure decreases, thrust output will

increase due to greater efficiency of jet aircraft in thin air.
remain the same since compression of inlet air will compensate for any decrease in air pressure.
decrease due to higher density altitude.

10. What effect will an increase in altitude have upon the available equivalent shaft horsepower (ESHP) of a turboprop engine?

Lower air density and engine mass flow will cause a decrease in power.
Higher propeller efficiency will cause an increase in usable power (ESHP) and thrust.
Power will remain the same but propeller efficiency will decrease.

11. What effect, if any, does high ambient temperature have upon the thrust output of a turbine engine?

Thrust will be reduced due to the decrease in air density.
Thrust will remain the same, but turbine temperature will be higher.
Thrust will be higher because more heat energy is extracted from the hotter air.

12. What characterizes a transient compressor stall?

Loud, steady roar accompanied by heavy shuddering.
Sudden loss of thrust accompanied by a loud whine.
Intermittent "bang," as backfires and flow reversals take place.

13. What indicates that a compressor stall has developed and become steady?

Strong vibrations and loud roar.
Occasional loud "bang" and flow reversal.
Complete loss of power with severe reduction in airspeed.

14. Which type of compressor stall has the greatest potential for severe engine damage?

Intermittent "backfire" stall.
Transient "backfire" stall.
Steady, continuous flow reversal stall.

15. What recovery would be appropriate in the event of compressor stall?

Reduce fuel flow, reduce angle of attack, and increase airspeed.
Advance throttle, lower angle of attack, and reduce airspeed.
Reduce throttle, reduce airspeed, and increase angle of attack.

16. Under normal operating conditions, which combination of MAP and RPM produce the most severe wear, fatigue, and damage to high performance reciprocating engines?

High RPM and low MAP.
Low RPM and high MAP.
High RPM and high MAP.

17. What effect does high relative humidity have upon the maximum power output of modern aircraft engines?

Neither turbojet nor reciprocating engines are affected.
Reciprocating engines will experience a significant loss of BHP.
Turbojet engines will experience a significant loss of thrust.

18. Equivalent shaft horsepower (ESHP) of a turboprop engine is a measure of

turbine inlet temperature.
shaft: horsepower and jet thrust.
propeller thrust only.

19. Minimum specific fuel consumption of the turboprop engine is normally available in which altitude range?

10,000 feet to 25,000 feet.
25,000 feet to the tropopause.
The tropopause to 45,000 feet.

20. Where is the critical altitude of a supercharged- reciprocating engine?

The highest altitude at which a desired manifold pressure can be obtained.
Highest altitude where the mixture can be leaned to best power ratio.
The altitude at which maximum allowable BMEP can be obtained.