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SUBIECTE PENTRU EXAMENUL DE

EVALUARE A CUNOŞTINŢELOR FUNDAMENTALE ŞI DE SPECIALITATE

IUNIE 2011

1. A 1000 kg ar !" pu##e$ "#%&#' up&ar$" %n a

2()* gra$!en+ r%a$ &!+, %n"+an+- "pee$. T,e

 pu##!ng %re !" 0.) kN. In +,!" a"e( +,e r%##!ngre"!"+ane %e!!en+ !"a 0.02)

  0.02

0.01)$ 0.01

3 p%!n+"

2. A 4e,!#e &,ee#( pre""e$ aga!n"+ +,e r%a$ ' a

12.) kN %re( genera+e" "!mu#+ane%u"#' a 3000 N rak!ng %re an$ a 000 N #a+era# gu!$!ng

%re. In +,!" a"e( +,e +'re5r%a$ gr!p %e!!en+

!"a 0(

  0()

0(6

$ 13 pun+e

3. A "!ng#e5$!"k $r'5#u+, ,a" +,e r!+!%n

%e!!en+ % 0.3( +,e "ae+' %e!!en+ % 1(3

an$ an +ran"m!+ a ma7!ma# +%r8ue % 130 N.m9apa#e +%r8ue. :n%&!ng +,a+ +,e #u+, $!"k

,a" a 200 mm %u+er $!ame+er an$ a 120 mm!nner $!ame+er( %mpu+e +,e a4erage pre""urea+!ng %n +,e #u+, $!"k

a. 123 kPa; . 13) kPa;

. 1<0 kPa; $. 162 kPa.3 p%!n+"

. I+ %n"!$er" a rear5&,ee# $r!4e #%rr' 9+ruk(

&!+, #%ng!+u$!na# eng!ne an$ +,ree ",a+

gear%7 !n $!re+ $r!4e a+ +,e m%men+%n"!$ere$. Ea, &,ee# % +,e $r!4e a7#e ,a" a

,u re$u+!%n %rme$ ' an e7+erna##' me",!ng

gear. =n &,!, "!$e % +,e #%rr' !+ !" p#ae$ +,er%&n &,ee# % +,e a7#e 9!na# $r!4e>

a #e+5,an$ "!$e

  r!g,+ ,an$ "!$e

regar$#e""$ +,e $!re+ $r!4e an?+ e rea#!"e$

3 pun+e

). T,e $!"k5an$5a##!per rake !" &!$e"prea$!ng !n

+,e $e+r!men+ % +,e $rum5an$5",%e" rake

 eau"ea !+ !" %%#!ng a"+er  !+ ,a" a m%re "+a#e %pera+!%n 9un+!%n!ng

!+ nee$" #e"" energ' %r a+ua+!%n

$ !+ ,a" "ma##er ma"" an$ m%men+ % !ner+!a@,!, % +,e pre4!%u" "+a+emen+" aren?+

+rue >

3 pun+e

<. A +ruk !+ !" r!$!ng &!+, 2 km/, a+ +,e m%men+&,en +,e $r!4er ,!+" +,e rake pe$a# +% "+%p +,e

4e,!#e. @!+, a rak!ng "'"+em?" $e#a' +!me %

0.2) " 9$ur!ng +,!" per!%$ %n"!$er" +,a+ +,e+ruk "pee$ rema!n" %n"+an+ an$ a reg!me

$ee#era+!%n % ) m/"2( $e+erm!ne +,e +ra4e##!ng

"pae +% "+%p.

a 0 m ) m )0 m $ <0 m

3 p%!n+"

. T,e a8uap#an!ng p,en%men%n mean"

a +,e &a+er !" e#!m!na+e$ e+&een +'re kn%";  +,e purg!ng % +,e %n$en"a+!%n &a+er

re"u#+e$ !n +,e pneuma+!a##' a+ua+e$ rak!ng "'"+em;

+,e &a+er !n+erp%"!+!%n e+&een +'re an$

r%a$( +,a+ re$ue" +,e gr!p;

$ +,e +en$en' % 4e,!#e #!+!ng5% a+ ,!g,"pee$.

3 pun+e

6. A r%n+ $r!4e ar !" "+%ppe$ %n an a"p,a#+ an$

e4en r%a$. T,e park!ng rake !" app#!e$ an$ !"a+!ng %n +,e rear &,ee#". !n$ +,e m!n!mum

4a#ue % +,e +%r8ue +% e app#!e$ +% +,e p!n!%n

% +,e !na# $r!4e "% +,a+ +,e ar an "+ar+ !n +,eg!4en a"e> I+ kn%&" +%+a# ma"" m1000 kg;

ma"" %n +,e r%n+ &,ee#" m1<00 kg; $'nam!

ra$!u" % +,e &,ee#" r $0.3 m; ae#era+!%n %

gra4!+' g10 m/"2( gr!p %e!!en+ 0.6( !na#$r!4e e!!en' 00.F<( numer" % +ee+, %r

 p!n!%n an$ r!ng 6( re"pe+!4e#' 32.

a 2)0 Nm

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  260 Nm 310 Nm

$ +,e ar &!## n%+ e a#e +% "+ar+ e4en ! +,e

+%r8ue !" 4er' !g3 p%!n+"

F. A ar &,ee# ,a" +,e $'nam! ra$!u" r $  300

mm. T,e rea+!%n %re n%rma# +% +,e r%a$"urae !" 3 kN. T,e &,ee# rake ,a" a

"!ng#e $!"k an$ a "!ng#e p!"+%n a##!per. I+

kn%&" +,e $!"k ee+!4e ra$!u" r    100 mm( +,e p!"+%n area A 1200 mm2( +,e pa$ H $!"k

r!+!%n %e!!en+ 0.). De+erm!ne +,e

 rak!ng %re pr%$ue$ ' +,e &,ee# %n a r%a$

&!+, a gr!p %e!!en+ 0.) &,en +,e rake#!8u!$ pre""ure a+ +,e a##!per !" p 0 ar.

a 100 N

  1)00 N 1<00 N

$ 100 N

3 pun+e

10. T,e "+!ne"" % a %!# "pr!ng an e re$ue$ '+,e !nrea"e %

a &!re $!ame+er 

  %!# $!ame+er  %!# &%un$!ng ang#e

$ numer % "e++!ng %!#"

3 pun+e

11. Aer%$'nam! re"!"+ane 920 p%!n+"

• +,e +&% ma!n au"e" +,a+ genera+e +,!"

re"!"+ane 9$rag;

•  p#ae +,e aer%$'nam! re"!"+ane %re %n +,e

m%+%r 4e,!#e ",ema an$ !n$!a+e +,e p%!n+name % +,e 4!r+ua# a+!%n % +,e"e %re;

• a#u#u" re#a+!%n( &!+, +,e e7p#ana+!%n % +,e

mean!ng %r ea, +erm;

• !n#uene" %4er +,e aer%$'nam! $rag

9a+m%"p,er! +empera+ure( a#+!+u$e( "pee$(#a+era# &!n$( &!n$%&" %pen!ng( "+a+e %

 %$'&%rk #eanne"";

• +'p!a# 4a#ue" %r +,e aer%$'nam! $rag

%e!!en+.

12. R%##!ng re"!"+ane 920 p%!n+"

• au"e" +,a+ genera+e +,!" re"!"+ane;

• ",ema+!" % +,e &,ee# ae+e$ ' +,e r%##!ng

re"!"+ane;

• a#u#u" e8ua+!%n( &!+, +,e e7p#ana+!%n % +,e

ea, +erm mean!ng;

• !n#uene" %4er r%##!ng re"!"+ane 9pa+,( +'re"(

4e#%!+'( !n#a+!%n pre""ure( $r!4e m%men+ a+

+,e &,ee#( +empera+ure;

• +'p!a# 4a#ue" %r +,e r%##!ng re"!"+ane

%e!!en+.

13. C%mpara+!4e ana#'"!" % MaP,er"%n "+ru+

#!nkage an$ ",%r+5#%ng A arm #!nkage 920

 p%!n+"1 H enumera+e +,e +,ree ma!n un+!%n" % +,e

"u"pen"!%n;

2 H $e+a!# +,e un+!%n % +,e gu!$ane

me,an!"m 9#!nkage;

3 H a7#e +'pe" +,a+ are "u!+a#e; H ",ema+! $ra&!ng" % +,e +&% me,an!"m

+'pe" &!+, +,e ma!n %mp%nen+ par+";) H &,a+ !+ !" !n+en$e$ a+ +,e #!nkage $e"!gn +%

%p+!m!Je +,e 4e,!#e $'nam! per%rmane";

< H e,a4!%ur a+ "!ngu#ar ump H ",eme; H e,a4!%ur a+ %$' r%## H ",eme;

6 H %mpar!"%n regar$!ng +,e +e,n%#%g!a#

%mp#e7!+';F H %mpar!"%n regar$!ng +,e ma!n+enane

$!!u#+';

10 H %mpar!"%n regar$!ng +,e pakag!ng.