Engine Cooling Systems Questions With
Correct Answers
1. vWhat vis vmeant vby vpressure vcooling vof van vaircraft vengine? v- vAnswer v- vAir vcooling vin vwhich vair
vis vforced vto vflow v through vbaffles vand vcylinder vfins vby va v pressure vdifferential vacross vthe vengine.
2. vWhat vis vthe vpurpose vof van vaugmentor vtube vin vthe vcooling vsystem vof van vaircraft vreciprocating
vengine? v- vAnswer v- vThe vaugmentor vtube v uses vthe vvelocity vof vthe vexhaust vgases vto vproduce va
vlow vpressure von vone vside vof v the vengine vthat vhelps vpull vcooling vair vthrough vit.
3. vWhere vis vthe vhighest vtemperature vlocated vin va vturbine vengine? v- vAnswer v- vAt vthe vinlet vto
vthe vhigh-pressure vturbine.
4. vHow vare vthe vturbine vinlet vguide vvanes vand vthe vfirst-stage vturbine vblades vin vsome vturbine
vengines vcooled? v- vAnswer v- vHigh-pressure vcompressor vbleed vair vflows vthrough v the vhollow vguide
vvanes vand vhollow vturbine vblades.
5. vWhich vside vof van vair-cooled vengine vcylinder vhas vthe vgreatest vamount vof vcooling vfins? v-
vAnswer v- vThe vside vof vthe vcylinder vin vwhich vthe vexhaust vvalve vis vlocated.
6. vWhat vshould vbe vdone vto vrepair va vbent vcooling vfin vin va vcast valuminum vcylinder vhead? v-
vAnswer v- vIt vis vnormally vbest vto vleave va vbent vcast vfin valone vif vit vdoes vnot vrestrict vthe vflow vof
vair. vCast vfins vare vbrittle vand v could vbreak voff.
7. vWhat vis vused vin va vhelicopter vto vincrease vthe vamount vof vcooling vair vthat vflows vover vthe
vengine vcylinders? v- vAnswer v- vA vbelt-driven vfan.
8. vWhat vshould vbe vthe vposition vof vthe vcowl vflaps von va vreciprocating vengine vwhen vit vis vrun von
vthe vground? v- vAnswer v- vThey vshould v be vwide vopen vwhen voperating vthe vengine von vthe vground.
Correct Answers
1. vWhat vis vmeant vby vpressure vcooling vof van vaircraft vengine? v- vAnswer v- vAir vcooling vin vwhich vair
vis vforced vto vflow v through vbaffles vand vcylinder vfins vby va v pressure vdifferential vacross vthe vengine.
2. vWhat vis vthe vpurpose vof van vaugmentor vtube vin vthe vcooling vsystem vof van vaircraft vreciprocating
vengine? v- vAnswer v- vThe vaugmentor vtube v uses vthe vvelocity vof vthe vexhaust vgases vto vproduce va
vlow vpressure von vone vside vof v the vengine vthat vhelps vpull vcooling vair vthrough vit.
3. vWhere vis vthe vhighest vtemperature vlocated vin va vturbine vengine? v- vAnswer v- vAt vthe vinlet vto
vthe vhigh-pressure vturbine.
4. vHow vare vthe vturbine vinlet vguide vvanes vand vthe vfirst-stage vturbine vblades vin vsome vturbine
vengines vcooled? v- vAnswer v- vHigh-pressure vcompressor vbleed vair vflows vthrough v the vhollow vguide
vvanes vand vhollow vturbine vblades.
5. vWhich vside vof van vair-cooled vengine vcylinder vhas vthe vgreatest vamount vof vcooling vfins? v-
vAnswer v- vThe vside vof vthe vcylinder vin vwhich vthe vexhaust vvalve vis vlocated.
6. vWhat vshould vbe vdone vto vrepair va vbent vcooling vfin vin va vcast valuminum vcylinder vhead? v-
vAnswer v- vIt vis vnormally vbest vto vleave va vbent vcast vfin valone vif vit vdoes vnot vrestrict vthe vflow vof
vair. vCast vfins vare vbrittle vand v could vbreak voff.
7. vWhat vis vused vin va vhelicopter vto vincrease vthe vamount vof vcooling vair vthat vflows vover vthe
vengine vcylinders? v- vAnswer v- vA vbelt-driven vfan.
8. vWhat vshould vbe vthe vposition vof vthe vcowl vflaps von va vreciprocating vengine vwhen vit vis vrun von
vthe vground? v- vAnswer v- vThey vshould v be vwide vopen vwhen voperating vthe vengine von vthe vground.
