正确答案：C

(108)Which procedure increases holding time when deicing/anti-icing an airplane using a two-step process?

?

A．Heated Type 1 fluid followed by cold Type 2 fluid.

? ?

B．Cold Type 2 fluid followed by hot Type 2 fluid. C．Heated Type 1 or 2 fluid followed by cold Type 1 fluid.

正确答案：A

(109)Which of the following will decrease the holding time during anti-icing using a two-step process?

? ? ?

A．Apply heated Type 2 fluid. B．Decrease the water content.

C．Increase the viscosity of Type 1 fluid.

正确答案：A

(110)Which is a disadvantage of the one-step over the two-step process when deicing/anti-icing an airplane?

? ? ?

A．It is more complicated. B．The holding time is increased.

C．More fluid is used with the one-step method when large deposits of ice and snow must be flushed off airplane surfaces.

正确答案：C

(111)Snow on top of deicing or anti-icing fluids

?

A．need not be considered as adhering to the aircraft.

? ?

B．must be considered as adhering to the aircraft. C．must be considered as adhering to the aircraft, but a safe takeoff can be made as it will blow off.

正确答案：B

112)Freezing Point Depressant (FPD) fluids used for deicing

? ?

A．provide ice protection during flight. B．are intended to provide ice protection on the ground only.

?

C．on the ground, cause no performance degradation during takeoff.

正确答案：B

(113)Anti-icing fluid should provide freezing point protection to

? ? ?

A．-20°F ambient temperature.

B．+32°F outside temperature or below.

C．a freezing point no greater than 20°F below the ambient or airplane surface temperature.

正确答案：C

(114)The purpose of dilating ethylene glycol deicing fluid with water in non-precipitation condition is to

? ?

A．raise the eutectic point

B．Increase the minimum freezing point (onset of crystallization)

?

C．Decrease the freeze point

正确答案：C

(115)What is the minimum glycol content of Type 1 deicing/anti-icing fluid?

? A．30 percent. ? B．50 percent. ?

C．80 percent.

正确答案：C

(116)What is the minimum glycol content of type 2 deicing anti-icing fluid?

?

A．80 percent

? ?

B．50 percent C．30 percent

正确答案：B

(117)Freezing Point Depressant (FPD) fluids are highly soluble in water; however,

?

A．ice is slow to absorb it but fast to melt when in contact with FPD.

?

B．ice absorbs it very fast but is slow to melt when in contact with it.

?

C．ice is slow to absorb it, and to melt when in contact with it.

正确答案：C

(118)Freezing Point Depressant (FPD) fluid residue on engine fan or compressor blades

?

A．can increase performance and cause stalls or surges.