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Aeronautical Institute of Bangladesh (AIB)Diploma in Aeronautical Engineering

Mid Term Examination-202! u"#uct$ I%&

Mid term examanition

M'$ Mars *+0x*+0

PITOT-SRATIC SYSTEMS AND INSTRUMENTS

1. What is/are the input o ASI!a" pitot pressure #" stati$ pressure $" a#so%ute pressure &" #oth a an& # are $orre$t

'. To pre(ent the entr) o *ater an& other orei+n ,atter in the Pitot tu#e is $a%%e&!a) Mast b) Drain hole c) Baffle d) both a and c are correct

. Airspee& in&i$ator ,easures!a) 1/22+ static pressure b) mgh c) m/ d) 1/2v2

. Whi$h state,ent is $orre$t in the o%%o*in+a) IA ! "#$# error + compressibilit% error b) $A ! IA & "$

b) 'A ! IA & "$ d) (A ! $A + Densit% error

0. To e%i,inate pressure &rop an& ti,e %e+ interna% &ia,eter o Pitot - stati$ tu#e is!a) 1/2inch b)

1/inch c)1/*inch d) 1 inch

Ma$h nu,#er is the ratio o!a) ocal sound speed b)22ocal Airspeed,,

ocal Airspeed ocal sound speedc) ocal true Airspeed d) both a and c are correct ocal sound speed3. 4NE a%ti,eter settin+ ,eans!a) etting the pressure prevailing at airfieldb) etting the standard sea-level pressure#c) etting the pressure scale to ma.e the altimeter read airfield high#d) $ither a or c is correct

5. I on%) orii$e is there in the ,eterin+ unit in&i$ation o 6SI *i%%!a) "ositive b) egative c) o effect d) eutral indication

7YROSCOPE PRINCIP8E 9 INSTRUMENTS

:. Whi$h +)ros$ope esta#%ishes t*o essentia% reeren$e &atu,a) 0 b) D c) 'ate g%ro d) ori3ontal a4is g%roscope

1;. Ri+i&it) o +)ros$ope is &ire$t%) proportiona% to!a) peed of the rotor b) mass of the rotor c) 'adius of g%ration d) All the above are correct

11. When the +i,#a%s orientation is su$h that the spin a

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1'. The te,perature at *hi$h so%i& an& %i>ui& $an eui%i#riu, is $a%%e&!a) Boiling point b) steam point c) melting point d) absolute3ero

1. The te,perature at *hi$h %i>ui& an& (apour $an eui%i#riu, is $a%%e&!a) Melting point b) ice point c) absolute 3ero d) boilingpint

1. The a#so%ute ?ero is!a) -25# 16o 7 b) & *68#95o: c) ;o' d) all the above are correct

10. Ther,o$oup%e prin$ip%e is asso$iate& *ith the or, o ener+) $on(ersion@ no*n as the!a) (homson effect b) pelter effect c) seebec. effect d) all the above are correct

1. When e%e$tri$ $urrent %o*s throu+h the Bun$tion o t*o &ierent su#stan$es it $auses heat@ thisee$tis no*n as!a) (homson effect b) peltier effect c) seebec. effect d) parasitic effect

13. Whi$h ,eta%s an& $o,positions are use& in E7T ,easure,enta) 7opper and constantan b) iron and constantan c) chromel and constantan d) chromel andalumel

15. Co,pensatin+ %ea&s are use& in E7T s)ste, to!a) 7ompenstate parasitic effects b) reduce costc) Increase accurac% d) both a and b are correct

1:. Tri,,in+ resistan$e spoo% is $onne$te& in!a) "arallel uantit) in&i$ator to rea&!a) :ull b) half c) empt% d) nothing

''. Sensin+ %oop (o%ta+e 6s" o the #asi$ $apa$itan$e ue% >uantit) +au+e s)ste,!a) Is variable b) remains constant=c) is alue s)n$hro o$$upies sa,e an+u%ar position!a) (he% are in electrical 3ero position b) the% are in ?@? positionc) (he stator voltages are balanced and no current flo

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'3. When the rotors o a tor>ue s)n$hro o$$upies sa,e an+u%ar position!a) (he%are in electrical 3ero position b) the% are in ?@? positionc) the stator voltages are balanced and no current flo