1.On Which stroke are both valves on a four-stroke cycle reciprocang aircra engine ? a. a.Power & ehaust b. !ntake & co"pressionc. Exhaust & intake #. $ nine cylin%er ra%ial engine with a bore %ia of .' & a stroke of (' will have a piston %isplace"ent %isplace"ent of a. )*+ cc b. 1*# cc %. #++ cc c. 1283 cc ,. aster ro% bearings are generally what type ? b. oller c. /all %. 0aper roller a. Plain *. !f fuelair rao is proper an% ignion "ing is correct 2 the co"buson process shoul% be co"plete% a. #+o to ,+o before 034 at the en% of the co"pression stroke b. When the exhaust valve opens at the end of the power stroke c. 5ust before 034 at the beginning of the power stroke . Which of the following is a characterisc of a thrust bearing of a thrust bearing use% in "ost ra%ial engines? a. 0apere% roller b. 3ouble row c. Deep roove ball %. 6one (. Which of the following will will %ecrease volu"etric volu"etric e7ciency in a reciprocang reciprocang engine? 1. 8ull thro9le operaon #. :ow cylin%er hea% te"p e"pera erature ,. !"proper valve "ing *. ;h ;harp ben ben% %s in in th the in in%uco con sy syste" .. What is an a%vantage of using "etallic so%iu" lle% ehaust valves in aircra reciprocang engines? a. increase strength an% resistance to cracking b. (educed valve operan te%p. c. greater resistance to %eterioraons at high valve te"p. 1+. @sing the following infor"aon infor"aon 2 %eter"ine how "any %egrees the cranksha rotate rotate with both the intake an% ehaust valve seate%? 1. !ntake opens 1o /034 #. Ahaust opens )+o //34 ,. !ntake closes *o $/34 *. Aaust closes 1+ o $034 a. #>+ o c. # o %. ,(+ o b. 2"# o
11. 0he volu"e of a cylin%er eBuals )+ cc when the piston is at the b%c 2 when the piston is at the 034 2the volu"e eBuals 1+ cc . what is the co"pression rao ? a. 1C)+ b. )C1+ c. )C+1 %. )C 1#. D1E 4ast iron piston rings "ay be use% in chro"e plate% cylin%ers. D#E 4hro"e plate% rings "ay be use% in plain steel cylin%ers egar%ing the above state"ent. a. Only no. 1 is correct %. only no. # is correct.
b. 6either no.1 & no.# is true
c. /oth no. 1 & no. # are true.
1,. Folu"etric e7ciency C
1*. Propulsive e7ciency
1. 0her"al e7ciency
1(. What is the source of "ost of the heat that is absorbe% by the lubricang oil in a reciprocang engine ? c. Piston and c'linder walls a. 4ranksha "ain bearing b. Ahaust valves %. none 1). What is the pri"ary purpose of the oil to fuel heat echanger ? a. 4ool the fuel c. 3eaerate the oil b. )ool the oil
%. /oth b & c
1=. 0he vent line connecng the oil supply tank an% the engine in so"e in so"e %ry su"p engine installaon per"its C a. PressuriGaon of the oil supply to prevent cavitaon of the oil supply pu"p b. Oil vapors fro" the engine to be con%ense% an% %raine% into the supply tank c. $he oil tank to be vented throuh the nor%al enine vent. %. $O0$ 1>. 0he viscosity of a liBui% is a "easure of its b. ate of change of internal fricon with change in te"perature. a. (esistance to *ow c. Weight2 or %ensity %. 6one #+. 0he reco""en%e% aircra engine lubricants are a. ineral or synthec base b. Fegetable 2 ineral or synthec base c. $ni"al 2 ineral or synthec base %. $ll of the above #1. $s an ai% to col% weather starng 2 the oil %iluon syste" thins the oil with a. kerosene b. $lcohol c. Hasoline %.6one
##. Which state"ent is correct regar%ing a connuous Iow fuel inJecon syste" use% on "any reciprocang engines? a. 8uel is inJecte% %irectly into each cylin%er b. 8uel is inJecte% at each cylin%er intake port c. 0wo inJector noGGles are use% in the inJector fuel syste" for various spee%s %. $O0$ #,.0he %evice that controls the volu"e of the fuelair "iture to the cylin%ers is calle% a. iture control b. etering Jet c. 0hro9le valve %. 6O0$ #*. 3uring operaon of an aircra engine 2 the pressure %rop in the carburetor venture %epen%s pri"arily upon the a. $ir te"perature b. /aro"etric Pressure c. $ir velocity %. /oth a & b #. 0he %evice that controls the rao of the fuel air "iture to the cylin%er is calle% a. iture control b. etering Jet c. 0hro9le valve %. 6O0$ #(. What is the relaonship between the pressure an% velocity passing through a ventury? a. 0here is no %irect relaon between the pressure an% the velocity b. 0he pressure is %irectly proporonal to the velocity c. 0he pressure is inversely proporonal to the velocity %. 6one #). What co"ponent is use% to e nsure fuel %elivery %uring perio%s of rapi% engine acceleraon? a. $cceleraon pu"p ,1)#+1 * *=1* =1* )=1* 11=1* 1#=1* 1*=1* 1==1* 1>=1* #1=1* #=1* #(=1* #==1* 1>1* #>1* *>1* =>1* >>1* 11>1* 1>1* 1(>1*
Mechanical, thermal efficiencies;. thermal and volumetric efficiencies; Operating principles — 2 stroke, Operating principles — 4 stroke, Operating principles — 4 stroke, Otto and Diesel cycle Otto and Diesel cycle Piston displacement compression ratio ngine configuration and firing order. ngine Performance !Po"er calculation and measurement; ngine Performance ! #actors affecting engine po"er; ngine Performance ! #actors affecting engine po"er; ngine Performance !Mi$tures%leaning, pre&ignition , detonation ngine Performance ! Mi$tures%leaning, pre&ignition , detonation ngine 'onstruction ! 'rank case, crank shaft, cam shafts, sumps; ngine 'onstruction ! (ccessory gear)o$ ngine 'onstruction ! 'ylinder and piston assem)lies ngine 'onstruction ! 'onnecting rods, inlet and e$haust manifolds ngine 'onstruction ! *alve mechanisms ngine 'onstruction ! Propeller reduction gear)o$es
1=>1* ##>1* #,>1* #>1* #>>1* ,+>1* (>1* )>1* >>1* 1,>1* 1*>1* 1(>1* #+>1* #1>1* #,>1* #)>1* #=>1* ,+>1* ,111* (111* 1+111* 11111* 1,111* 1)111* 1=111* #+111* #*111*
ngine #uel +ystems ! 'ar)uretors types , construction ngine #uel +ystems ! 'ar)uretors types , construction ngine #uel +ystems ! Principle of operation , cing - eating ngine #uel +ystems ! Principle of operation , cing - eating ngine #uel +ystems ! #uel in/ection systems ! types ngine #uel +ystems ! #uel in/ection systems ! 'onstruction ngine #uel +ystems ! #uel in/ection systems ! 'onstruction ngine #uel +ystems ! #uel in/ection systems ! principles of operation ngine #uel +ystems ! ! #uel in/ection systems ! principles of operation +tarting and gnition +ystems ! +tarting systems +tarting and gnition +ystems ! +tarting systems +tarting and gnition +ystems ! +tarting systems , pre&heat systems +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! 0o" and high tension systems +tarting and gnition +ystems ! 0o" and high tension systems +tarting and gnition +ystems ! gnition harnesses, spark plugs +tarting and gnition +ystems ! ; gnition harnesses, spark plugs nduction, $haust and 'ooling +ystems ! 'onstruction and operation of! induction systems including alternate air systems nduction, $haust and 'ooling +ystems ! 'onstruction and operation of! induction systems including alternate air systems nduction, $haust and 'ooling +ystems ! $haust systems nduction, $haust and 'ooling +ystems ! engine cooling systems air and 0i1uid. nduction, $haust and 'ooling +ystems ! engine cooling systems air and 0i1uid. +upercharging%ur)o charging ! Principles and purpose and its effects on engine parameters +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! +ystem terminology; 'ontrol systems; +ystem protection 0u)ricants and #uels Properties and specifications 0u)ricants and #uels Properties and specifications 0u)ricants and #uels Properties and specifications #uel additives +afety precautions. 0u)rication +ystems +ystem ! operation%lay&out 0u)rication +ystems +ystem ! operation%lay&out 0u)rication +ystems +ystem ! components. 0u)rication +ystems +ystem ! components.
1=#+1* *=1* (=1* ==1* 11=1* 1,=1* 1==1* #+=1* ##=1* #=1* #)=1* 1>1* ,>1* >1* =>1* 1+>1* 1#>1* 1>1* 1)>1* 1>>1* ##>1* #*>1* #(>1* #>>1* 11+1* (1+1* =1+1* 1+1+1* 1,1+1* 11+1* 1)1+1* #+1+1* #*1+1* #)1+1* #>1+1* ,11+1* ,111* 111* )111* 1+111* 1#111* 1*111*
0u)rication +ystems +ystem !components. Mechanical, thermal efficiencies;. thermal and volumetric efficiencies; Operating principles — 2 stroke, Operating principles — 4 stroke, Operating principles — 4 stroke, Otto and Diesel cycle Otto and Diesel cycle Piston displacement compression ratio ngine configuration and firing order. ngine Performance !Po"er calculation and measurement; ngine Performance ! #actors affecting engine po"er; ngine Performance ! #actors affecting engine po"er; ngine Performance !Mi$tures%leaning, pre&ignition , detonation ngine Performance ! Mi$tures%leaning, pre&ignition , detonation ngine 'onstruction ! 'rank case, crank shaft, cam shafts, sumps; ngine 'onstruction ! (ccessory gear)o$ ngine 'onstruction ! 'ylinder and piston assem)lies ngine 'onstruction ! 'onnecting rods, inlet and e$haust manifolds ngine 'onstruction ! *alve mechanisms ngine 'onstruction ! Propeller reduction gear)o$es ngine #uel +ystems ! 'ar)uretors types , construction ngine #uel +ystems ! 'ar)uretors types , construction ngine #uel +ystems ! Principle of operation , cing - eating ngine #uel +ystems ! Principle of operation , cing - eating ngine #uel +ystems ! #uel in/ection systems ! types ngine #uel +ystems ! #uel in/ection systems ! 'onstruction ngine #uel +ystems ! #uel in/ection systems ! 'onstruction ngine #uel +ystems ! #uel in/ection systems ! principles of operation ngine #uel +ystems ! ! #uel in/ection systems ! principles of operation +tarting and gnition +ystems ! +tarting systems +tarting and gnition +ystems ! +tarting systems +tarting and gnition +ystems ! +tarting systems , pre&heat systems +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! Magneto types, construction and principles of operation +tarting and gnition +ystems ! 0o" and high tension systems +tarting and gnition +ystems ! 0o" and high tension systems +tarting and gnition +ystems ! gnition harnesses, spark plugs +tarting and gnition +ystems ! ; gnition harnesses, spark plugs nduction, $haust and 'ooling +ystems ! 'onstruction and operation of! induction systems including alternate air systems nduction, $haust and 'ooling +ystems ! 'onstruction and operation of!
1)111* 1>111* #1111* #*111* #(111* #=111*
induction systems including alternate air systems nduction, $haust and 'ooling +ystems ! $haust systems nduction, $haust and 'ooling +ystems ! engine cooling systems air and 0i1uid. nduction, $haust and 'ooling +ystems ! engine cooling systems air and 0i1uid. +upercharging%ur)o charging ! Principles and purpose and its effects on engine parameters +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! 'onstruction and operation +upercharging%ur)o charging ! +ystem terminology; 'ontrol systems; +ystem protection 0u)ricants and #uels Properties and specifications 0u)ricants and #uels Properties and specifications 0u)ricants and #uels Properties and specifications #uel additives +afety precautions. 0u)rication +ystems +ystem ! operation%lay&out 0u)rication +ystems +ystem ! operation%lay&out 0u)rication +ystems +ystem ! components. 0u)rication +ystems +ystem ! components. 0u)rication +ystems +ystem !components.
