POWER ENGINEERING CLASS 4 PART B EXAM QUESTIONS WITH VERIFIED
ANSWERS
e c- cCORRECT cANS✔✔Impulse cturbines:
Choose cone canswer.
a. care conly cused cwith clow cpressure csteam c
b. crequire clarge cthrust cbearings c
c. cwere cinvented cby cParsons c
d. chave clarge cpressure cdrops cacross cthe chuckets c
e. chave cblades cwith cthe csame csteam cinlet cand coutlet cangles
d c- cCORRECT cANS✔✔The cstationary cpassages cof ca creaction cturbine care ccalled cthe:
Choose cone canswer.
a. cShaft c
b. cRotor c
c. cShroud cring c
d. cFixed cblades c
e. cDiaphragms
c c- cCORRECT cANS✔✔The cgreat cmajority cof csteam cturbine cgoverning csystems cutilize cthe
a) chydraulic csystem cprinciple
b) cpneumatic csystem cprinciple
c) cmechanical ccentrifugal cprinciple
d) clever cprinciple
e) cbimetal cexpansion cprinciple
e c- cCORRECT cANS✔✔Biological cfouling cin crecirculating ccooling cwater ctowers cis ccaused cby calgae, c_____ cand cbacteria
cgrowth.
Choose cone canswer.
a. cFlora c
b. cFauna c
c. cMicro-organisms c
d. cBiological c
e. cFungi
c c- cCORRECT cANS✔✔With call cother cfactors cbeing cequal, ca ccounter-flow ccooling ctower c_____________ cas ca ccross-flow
ccooling ctower.
Choose cone canswer.
a. cIs cnot cas ctall c
b. cHas cmuch cless ccooling ccapacity c
c. cRequires cless cfloor cspace c
d. cRequires cless cfan cpower c
e. cHas ca clower cpressure cdrop
e c- cCORRECT cANS✔✔A csimple cgas cturbine cis cone cwithout creheaters cor:
Choose cone canswer.
a. cStarting cmotors c
b. cShafts c
c. cCompressors c
d. cCombustors c
e. cRegenerators
a c- cCORRECT cANS✔✔Large cinternal ccombustion cengines care ccooled cwith:
Choose cone canswer.
a. cWater cjackets c
b. cEvaporation c
c. cAir ccooling c
d. cCondensers c
e. cRefrigeration
, a c- cCORRECT cANS✔✔Using ca ccompressed cair cstarting cmotor cis ca cpopular cmethod cof cstarting:
Choose cone canswer.
a. cA clarge cstationary cdiesel cengine c
b. cA csmall ctwo-stroke cengine c
c. cA cgasoline cengine c
d. cAn caircraft cengine c
e. cA cpropane cengine
b c- cCORRECT cANS✔✔When ca creciprocating cpump cdelivers cfluid cevery csecond cstroke cof cits cpiston, cit cis ccalled ca
c___________ cpump:
Choose cone canswer.
a. cPositive cdisplacement c
b. cSingle cacting c
c. cTwo-stage c
d. cDouble cacting c
e. cDuplex
c c- cCORRECT cANS✔✔Rotary cpumps:
1. care chigh cpressure cpumps
2. cmust cbe cprimed
3. cuse cmechanical cseals
4. care cpositive cdisplacement cpumps
a) c1, c2
b) c2, c3
c) c1, c4
d) c1, c3, c4
e) c1, c2, c3, c4
a c- cCORRECT cANS✔✔Intercoolers:
Choose cone canswer.
a. cMust chave ca cdrain c
b. cAre cmore cefficient cwhen ccooled cwith cair cthan cwith cwater c
c. cAre cused con cdouble cacting csingle cstage ccompressors c
d. cHelp cincrease cthe cvolume cof cthe cair c
e. cShould cuse can cantifreeze csolution
e c- cCORRECT cANS✔✔Grease:
Choose cone canswer.
a. cIs ca csemi-liquid c
b. cIs can cexcellent chigh-speed, clow cload clubricant c
c. cAttracts cdirt cand cwater cto cbearings, cleading cto cpremature cfailure c
d. cIs clikely cto cdrip cor csplash cfrom cbearings cand ctherefore cis crarely cused cin cthe ctextile cand cfood cindustries c
e. cCan cbe cused cunder cconditions cwhere coil cmay cleak caway cand cleave cthe cbearing cdry
a c- cCORRECT cANS✔✔The cproperty cof coil cthat cindicates cits cability cto csupport ca cload cis:
Choose cone canswer.
a. cViscosity c
b. cViscosity cindex c
c. cPour cpoint c
d. cFloc cpoint c
e. cConsistency
d c- cCORRECT cANS✔✔Which cof cthe cfollowing chas cthe cgreatest ceffect con cthe cviscosity cof clubrication coil?
Choose cone canswer.
a. cPressure c
b. cLoad c
c. cFlow c
d. cTemperature c
e. cSpeed
b c- cCORRECT cANS✔✔Sodium c(Soda) cBase cGreases care csuitable cfor ctemperatures cas chigh cas c___°C
a. c150
b. c120
c. c180
d. c100
e. c160
a c- cCORRECT cANS✔✔Which cliquid clubricant cis cthe cmost ccommonly cused cclass?
a. cMineral coils
b. cFixed coils
c. cSynthetic coils
d. cHigh cviscosity coil c
e. cLow cviscosity coil
ANSWERS
e c- cCORRECT cANS✔✔Impulse cturbines:
Choose cone canswer.
a. care conly cused cwith clow cpressure csteam c
b. crequire clarge cthrust cbearings c
c. cwere cinvented cby cParsons c
d. chave clarge cpressure cdrops cacross cthe chuckets c
e. chave cblades cwith cthe csame csteam cinlet cand coutlet cangles
d c- cCORRECT cANS✔✔The cstationary cpassages cof ca creaction cturbine care ccalled cthe:
Choose cone canswer.
a. cShaft c
b. cRotor c
c. cShroud cring c
d. cFixed cblades c
e. cDiaphragms
c c- cCORRECT cANS✔✔The cgreat cmajority cof csteam cturbine cgoverning csystems cutilize cthe
a) chydraulic csystem cprinciple
b) cpneumatic csystem cprinciple
c) cmechanical ccentrifugal cprinciple
d) clever cprinciple
e) cbimetal cexpansion cprinciple
e c- cCORRECT cANS✔✔Biological cfouling cin crecirculating ccooling cwater ctowers cis ccaused cby calgae, c_____ cand cbacteria
cgrowth.
Choose cone canswer.
a. cFlora c
b. cFauna c
c. cMicro-organisms c
d. cBiological c
e. cFungi
c c- cCORRECT cANS✔✔With call cother cfactors cbeing cequal, ca ccounter-flow ccooling ctower c_____________ cas ca ccross-flow
ccooling ctower.
Choose cone canswer.
a. cIs cnot cas ctall c
b. cHas cmuch cless ccooling ccapacity c
c. cRequires cless cfloor cspace c
d. cRequires cless cfan cpower c
e. cHas ca clower cpressure cdrop
e c- cCORRECT cANS✔✔A csimple cgas cturbine cis cone cwithout creheaters cor:
Choose cone canswer.
a. cStarting cmotors c
b. cShafts c
c. cCompressors c
d. cCombustors c
e. cRegenerators
a c- cCORRECT cANS✔✔Large cinternal ccombustion cengines care ccooled cwith:
Choose cone canswer.
a. cWater cjackets c
b. cEvaporation c
c. cAir ccooling c
d. cCondensers c
e. cRefrigeration
, a c- cCORRECT cANS✔✔Using ca ccompressed cair cstarting cmotor cis ca cpopular cmethod cof cstarting:
Choose cone canswer.
a. cA clarge cstationary cdiesel cengine c
b. cA csmall ctwo-stroke cengine c
c. cA cgasoline cengine c
d. cAn caircraft cengine c
e. cA cpropane cengine
b c- cCORRECT cANS✔✔When ca creciprocating cpump cdelivers cfluid cevery csecond cstroke cof cits cpiston, cit cis ccalled ca
c___________ cpump:
Choose cone canswer.
a. cPositive cdisplacement c
b. cSingle cacting c
c. cTwo-stage c
d. cDouble cacting c
e. cDuplex
c c- cCORRECT cANS✔✔Rotary cpumps:
1. care chigh cpressure cpumps
2. cmust cbe cprimed
3. cuse cmechanical cseals
4. care cpositive cdisplacement cpumps
a) c1, c2
b) c2, c3
c) c1, c4
d) c1, c3, c4
e) c1, c2, c3, c4
a c- cCORRECT cANS✔✔Intercoolers:
Choose cone canswer.
a. cMust chave ca cdrain c
b. cAre cmore cefficient cwhen ccooled cwith cair cthan cwith cwater c
c. cAre cused con cdouble cacting csingle cstage ccompressors c
d. cHelp cincrease cthe cvolume cof cthe cair c
e. cShould cuse can cantifreeze csolution
e c- cCORRECT cANS✔✔Grease:
Choose cone canswer.
a. cIs ca csemi-liquid c
b. cIs can cexcellent chigh-speed, clow cload clubricant c
c. cAttracts cdirt cand cwater cto cbearings, cleading cto cpremature cfailure c
d. cIs clikely cto cdrip cor csplash cfrom cbearings cand ctherefore cis crarely cused cin cthe ctextile cand cfood cindustries c
e. cCan cbe cused cunder cconditions cwhere coil cmay cleak caway cand cleave cthe cbearing cdry
a c- cCORRECT cANS✔✔The cproperty cof coil cthat cindicates cits cability cto csupport ca cload cis:
Choose cone canswer.
a. cViscosity c
b. cViscosity cindex c
c. cPour cpoint c
d. cFloc cpoint c
e. cConsistency
d c- cCORRECT cANS✔✔Which cof cthe cfollowing chas cthe cgreatest ceffect con cthe cviscosity cof clubrication coil?
Choose cone canswer.
a. cPressure c
b. cLoad c
c. cFlow c
d. cTemperature c
e. cSpeed
b c- cCORRECT cANS✔✔Sodium c(Soda) cBase cGreases care csuitable cfor ctemperatures cas chigh cas c___°C
a. c150
b. c120
c. c180
d. c100
e. c160
a c- cCORRECT cANS✔✔Which cliquid clubricant cis cthe cmost ccommonly cused cclass?
a. cMineral coils
b. cFixed coils
c. cSynthetic coils
d. cHigh cviscosity coil c
e. cLow cviscosity coil
