Q-01 Fdny Questions And Answers
Rupture bmembers, bwhen bused bin bparallel bwith ba brelief bvalve, bare bnot bto bexceed
b_____% babove bdesigned bworking bpressure b- bcorrect banswers✔✔20%
Butterfly bvalve: bwhere bcan bit bbe bused? b- bcorrect banswers✔✔Can bbe bused bon bthe
binlet band boutlet bof ba bwater bpump
What belectrical bmotor bprotection bdevice bautomatically bresets bitself? b- bcorrect
banswers✔✔The bthermal bprotector
746 bwatts bequals bhow bmany bkilowatt bhours? b- bcorrect banswers✔✔.746 bkilowatt
bhours
What bposition bis bthe bliquid bline bservice bvalve bnormally bin? b- bcorrect
banswers✔✔Back-seated
In ban boperating bevaporator, boil bstays bon btop bof bwhich brefrigerant? b- bcorrect
banswers✔✔Carbon bdioxide, bR-744
At bwhat bpressure bdoes bthe brelief bvalve bblow bon ba bhigh bpressure bmachine? b-
bcorrect banswers✔✔300 bpsi
What bwould bindicate ba brestriction b(such bas bdirt bor bscale) bin bthe bliquid bline? b-
bcorrect banswers✔✔Frost bimmediately bafter bthe brestriction
What bdoes bsolubility bmean? b- bcorrect banswers✔✔The bability bof ba brefrigerant bto
bmix bwith bother bsubstances
Charging bVapor b—In ba bcompression bsystem, bwhere bdo byou bcharge bthe bvapor? b-
bcorrect banswers✔✔Suction bside bof bthe bcompressor bat bthe bSuction bService bValve
When bcomparing ba bbrine bwith bs bPH bof b8 bto bone bwith ba bPH bof b10, bits balkalinity
bis: b- bcorrect banswers✔✔100 btimes bgreater b(ex. bPH b8 bto bPH b9 bis b10 btimes
bgreater)
In ban befficiently boperating binduced bdraft bcooling btower, bthe bleaving bwater bis
bbetween: b- bcorrect banswers✔✔Dry bbulb band bwet bbulb btemperature
,To bproduce bthe bdesired bevaporator btemperature, bthe bpower binput bis breduced bby
bkeeping bhead bpressure... b- bcorrect banswers✔✔Head bpressure bas blow bas bpossible
b& bsuction bpressure bas bhigh bas bneeded
The baccumulator bis busually bbetween bthe... b- bcorrect banswers✔✔Compressor band
bevaporator
An boiling bsystem bin ba blarge bcentrifugal bsystem bshould bconsist bof bat bleast... b-
bcorrect banswers✔✔Reservoir, bpump band bdistribution blines
In ban bevaporator bthat bchills bbrine, bthe bgreatest bcooling beffect bon bthe bbrine bresults
bfrom bthe... b- bcorrect banswers✔✔Boiling bof blow bpressure bliquid
The bflow bof bweak bliquor bto bthe babsorber bis bcontrolled bby
A) bgas bpressure
B) bthrottling bdevice
C) bfloat bvalve
D) bpressure bof bthe bstrong bliquor bpump b- bcorrect banswers✔✔B) bthrottling bdevice
The bbest bway bof bdetecting bammonia bbrine bis bby busing
A) bCO2 bgas
B) bpotassium bof blime
C) bNessler breagent
D) bcarbonate bof bsoda b- bcorrect banswers✔✔C) bNessler breagent
The bbest btime bto bpurge ban bammonia bplant bwith b250 blbs. bof bammonia bis
A) bduring bshut-down, bbecause byou bwill blose bammonia
B) bwhile bcharging bthe bplant
C) bduring boperation
D) bnone bof bthe babove b- bcorrect banswers✔✔C) bduring boperation
What bwill bmake bthe bstrong bliquor bin bthe babsorber bdecrease?
A) bexpansion bvalve bopen btoo bmuch
B) bA bdecrease bin bevaporator bload
C) bAn bincrease bin bevaporator bload
D) bToo bmuch bsteam bon bthe bgenerator b- bcorrect banswers✔✔B) bA bdecrease bin
bevaporator bload
Which bof bthe bfollowing bstatements bis bincorrect?
A) bA bservice bvalve bis ba bkey-operated bshut-off bvalve bused bduring bshipment,
binstallation band brepairs
B) bBrine bis ba bliquid bcooled bby brefrigeration band bused bfor bthe btransmission bof bheat
C) bA bfusible bplug bhas ba bset-temperature bfusible bmember bto brelieve bpressure
D) bA brupture bmember bautomatically bruptures bat ba bpredetermined btemperature b-
bcorrect banswers✔✔D) bA brupture bmember bautomatically bruptures bat ba
bpredetermined btemperature
, Oil bin ba brefrigerant bshould
A) bhave ba bhigh bpour bpoint
B) bhave ba blow bflash bpoint
C) bhave ba bhigh bviscosity
D) bnot bcontain bmoisture b- bcorrect banswers✔✔D) bnot bcontain bmoisture
In ban bNH3 bdry bexpansion bevaporator bwith bTXV band bbulb bclamped bproperly bon
bthe boutlet bof bthe bevaporator, bthe bsuperheat bis
A) b7 bto b10° bF
B) b5 bto b9° bF
C) b20 bto b30° bF
D) b1 bto b2° bF b- bcorrect banswers✔✔A) b7 bto b10° bF
The bsetting bof ba bfusible bplug bis
A) b280° bF
B) b300° bF
C) b380° bF
D) b300 bpsig. b- bcorrect banswers✔✔A) b280° bF
If bthe binsulation bwas bremoved bfrom bthe bbulb bof bthe bexpansion bvalve, bwhat bwould
bhappen? b- bcorrect banswers✔✔Flooded bevaporator b—the bTXV bbulb bopens bin ba
brange bfrom b45 bto b85° bF. bIf bthe binsulation bwas bremoved, bthe bbulb bwould bsense
bthe btemperature bin bthe bmachine broom band bkeep bthe bTXV bopen, bthus bflooding
bthe bevaporator.
On bthe bmost bcommon bthree-phase, bfour-wire bservice, bthe bvoltage bbetween bany
bphase band bneutral bshould bbe
A) b105 bvolts
B) b120 bvolts
C) b208 bvolts
D) b220 bvolts b- bcorrect banswers✔✔B) b120 bvolts
A brefrigerant bovercharge bwould
A) bincrease bhead bpressure
B) bdecrease bhead bpressure
C) bdecrease bsolution-side bpressure
D) bdecrease bdischarge-side bpressure b- bcorrect banswers✔✔A) bincrease bhead
bpressure
A bdryer bis bgenerally binstalled bwith bother bequipment bin ba bcommercial bFreon
bcompressor bsystem. bThe brecommended blocation bof bthis bdryer bis bon bthe
A) bhigh-pressure bline bbetween bcondenser band breciever
B) bsuction bline bbetween bevaporator band bcompressor
C) bdischarge bline bbetween bcompressor band bcondenser
Rupture bmembers, bwhen bused bin bparallel bwith ba brelief bvalve, bare bnot bto bexceed
b_____% babove bdesigned bworking bpressure b- bcorrect banswers✔✔20%
Butterfly bvalve: bwhere bcan bit bbe bused? b- bcorrect banswers✔✔Can bbe bused bon bthe
binlet band boutlet bof ba bwater bpump
What belectrical bmotor bprotection bdevice bautomatically bresets bitself? b- bcorrect
banswers✔✔The bthermal bprotector
746 bwatts bequals bhow bmany bkilowatt bhours? b- bcorrect banswers✔✔.746 bkilowatt
bhours
What bposition bis bthe bliquid bline bservice bvalve bnormally bin? b- bcorrect
banswers✔✔Back-seated
In ban boperating bevaporator, boil bstays bon btop bof bwhich brefrigerant? b- bcorrect
banswers✔✔Carbon bdioxide, bR-744
At bwhat bpressure bdoes bthe brelief bvalve bblow bon ba bhigh bpressure bmachine? b-
bcorrect banswers✔✔300 bpsi
What bwould bindicate ba brestriction b(such bas bdirt bor bscale) bin bthe bliquid bline? b-
bcorrect banswers✔✔Frost bimmediately bafter bthe brestriction
What bdoes bsolubility bmean? b- bcorrect banswers✔✔The bability bof ba brefrigerant bto
bmix bwith bother bsubstances
Charging bVapor b—In ba bcompression bsystem, bwhere bdo byou bcharge bthe bvapor? b-
bcorrect banswers✔✔Suction bside bof bthe bcompressor bat bthe bSuction bService bValve
When bcomparing ba bbrine bwith bs bPH bof b8 bto bone bwith ba bPH bof b10, bits balkalinity
bis: b- bcorrect banswers✔✔100 btimes bgreater b(ex. bPH b8 bto bPH b9 bis b10 btimes
bgreater)
In ban befficiently boperating binduced bdraft bcooling btower, bthe bleaving bwater bis
bbetween: b- bcorrect banswers✔✔Dry bbulb band bwet bbulb btemperature
,To bproduce bthe bdesired bevaporator btemperature, bthe bpower binput bis breduced bby
bkeeping bhead bpressure... b- bcorrect banswers✔✔Head bpressure bas blow bas bpossible
b& bsuction bpressure bas bhigh bas bneeded
The baccumulator bis busually bbetween bthe... b- bcorrect banswers✔✔Compressor band
bevaporator
An boiling bsystem bin ba blarge bcentrifugal bsystem bshould bconsist bof bat bleast... b-
bcorrect banswers✔✔Reservoir, bpump band bdistribution blines
In ban bevaporator bthat bchills bbrine, bthe bgreatest bcooling beffect bon bthe bbrine bresults
bfrom bthe... b- bcorrect banswers✔✔Boiling bof blow bpressure bliquid
The bflow bof bweak bliquor bto bthe babsorber bis bcontrolled bby
A) bgas bpressure
B) bthrottling bdevice
C) bfloat bvalve
D) bpressure bof bthe bstrong bliquor bpump b- bcorrect banswers✔✔B) bthrottling bdevice
The bbest bway bof bdetecting bammonia bbrine bis bby busing
A) bCO2 bgas
B) bpotassium bof blime
C) bNessler breagent
D) bcarbonate bof bsoda b- bcorrect banswers✔✔C) bNessler breagent
The bbest btime bto bpurge ban bammonia bplant bwith b250 blbs. bof bammonia bis
A) bduring bshut-down, bbecause byou bwill blose bammonia
B) bwhile bcharging bthe bplant
C) bduring boperation
D) bnone bof bthe babove b- bcorrect banswers✔✔C) bduring boperation
What bwill bmake bthe bstrong bliquor bin bthe babsorber bdecrease?
A) bexpansion bvalve bopen btoo bmuch
B) bA bdecrease bin bevaporator bload
C) bAn bincrease bin bevaporator bload
D) bToo bmuch bsteam bon bthe bgenerator b- bcorrect banswers✔✔B) bA bdecrease bin
bevaporator bload
Which bof bthe bfollowing bstatements bis bincorrect?
A) bA bservice bvalve bis ba bkey-operated bshut-off bvalve bused bduring bshipment,
binstallation band brepairs
B) bBrine bis ba bliquid bcooled bby brefrigeration band bused bfor bthe btransmission bof bheat
C) bA bfusible bplug bhas ba bset-temperature bfusible bmember bto brelieve bpressure
D) bA brupture bmember bautomatically bruptures bat ba bpredetermined btemperature b-
bcorrect banswers✔✔D) bA brupture bmember bautomatically bruptures bat ba
bpredetermined btemperature
, Oil bin ba brefrigerant bshould
A) bhave ba bhigh bpour bpoint
B) bhave ba blow bflash bpoint
C) bhave ba bhigh bviscosity
D) bnot bcontain bmoisture b- bcorrect banswers✔✔D) bnot bcontain bmoisture
In ban bNH3 bdry bexpansion bevaporator bwith bTXV band bbulb bclamped bproperly bon
bthe boutlet bof bthe bevaporator, bthe bsuperheat bis
A) b7 bto b10° bF
B) b5 bto b9° bF
C) b20 bto b30° bF
D) b1 bto b2° bF b- bcorrect banswers✔✔A) b7 bto b10° bF
The bsetting bof ba bfusible bplug bis
A) b280° bF
B) b300° bF
C) b380° bF
D) b300 bpsig. b- bcorrect banswers✔✔A) b280° bF
If bthe binsulation bwas bremoved bfrom bthe bbulb bof bthe bexpansion bvalve, bwhat bwould
bhappen? b- bcorrect banswers✔✔Flooded bevaporator b—the bTXV bbulb bopens bin ba
brange bfrom b45 bto b85° bF. bIf bthe binsulation bwas bremoved, bthe bbulb bwould bsense
bthe btemperature bin bthe bmachine broom band bkeep bthe bTXV bopen, bthus bflooding
bthe bevaporator.
On bthe bmost bcommon bthree-phase, bfour-wire bservice, bthe bvoltage bbetween bany
bphase band bneutral bshould bbe
A) b105 bvolts
B) b120 bvolts
C) b208 bvolts
D) b220 bvolts b- bcorrect banswers✔✔B) b120 bvolts
A brefrigerant bovercharge bwould
A) bincrease bhead bpressure
B) bdecrease bhead bpressure
C) bdecrease bsolution-side bpressure
D) bdecrease bdischarge-side bpressure b- bcorrect banswers✔✔A) bincrease bhead
bpressure
A bdryer bis bgenerally binstalled bwith bother bequipment bin ba bcommercial bFreon
bcompressor bsystem. bThe brecommended blocation bof bthis bdryer bis bon bthe
A) bhigh-pressure bline bbetween bcondenser band breciever
B) bsuction bline bbetween bevaporator band bcompressor
C) bdischarge bline bbetween bcompressor band bcondenser
