fdny z51 rmo
questions answered
2024 verified graded
A+ already passed!
the nefficiency nof nthe nrefrigerant ncycle nis naffected nby nthe noperation nof nthe ncondenser. nOf nthe nfollowing, na nmore nefficient ncentrifugal ncompressor noperation nresults nfrom n- n(CORRECT nANSWER)-lowering nthe ncondenser npressure
In nmost nsemi nhermetic ncompressors, nthe nsuction nvapor nis nused nfor n- n(CORRECT nANSWER)-cools nthe nmotor
The namount nof nrefrigerant nthat nflows nthrough nthe norifices nof nan neconomizer nis ndetermined nby nthe n- n(CORRECT nANSWER)-difference nbetween nthe nhigh nside nand nthe nlow nside npressure
the ninstalation nof nan ninline nrefrigerant ncleaning nsystem nis nadvisable n- n(CORRECT nANSWER)-to nremove nimpurities nfrom nthe nsystem a nrefrigerant nengineer nverifies nthat na ncondenser npump nis ncavitation nof nthe nfollowing nthe nmost nlikely ncause nfor nthis ncondition nis: n- n(CORRECT nANSWER)-a nfaulty ncooling ntower nwater nlevel ncontroller
when nan nexpansion nvalve nis noperating nproperly, nat nthe nend nof nthe nevaporator nwill ncontain
n- n(CORRECT nANSWER)-only nsuperheated nvapor
a ncentrifugal nwater npump nis nconsidered nto nbe nfully nprimed nwhen n- n(CORRECT nANSWER)-
the npump nis nfull nof nliquid
A nrefrigeration ncompressor nhas nfailed nto nturn non. nthe nengineer non nduty nverifies nthe nelectrical ncircuit nto nthe nmotor, nincluding nall nswitches nand ncircuit nbreakers nis ncomplete, naccording nto nrecomended nservice npractice, nthe nnext nitem nto nbe nchecked nwould nlikely nbe nthe: n- n(CORRECT nANSWER)-temperature nand npressure ncontrols
Refrigerants nare ncharacterized nby ntheir nphysical nproperties nincluding nFlashpoint, nrefrigeration neffect nand nothers, nof nthe nrefrigerants nin ncommercial nand nindustrial nthe nhighest nlatent nheat nand nrefrigerant neffect nis: n- n(CORRECT nANSWER)-ammonia
which nof nthe nfollowing nashrae nrefrigerant nsafety nclassification nis nthe nmost ntoxic n- n(CORRECT nANSWER)-b3
which nof nthe nfollowing nashrae nrefrigerant nsafety nclassification nis nthe nmost nflammable n- n(CORRECT nANSWER)-a3
in nq nindirect nrefrigeration nsystem,of nthe nfollowing, nthe none nthat nwould nnot nbe nused nas na ncooling nmedium nfor nbuilding nspaces nbeing ncooled nis n- n(CORRECT nANSWER)-r n22 n(cooling nmedium= nglycol nor nany nbrine nsolution)
the nprimary nway nof nachieving ncapacity ncontrol nof na nan ncentrifugal ncompressor nis nby: n- n(CORRECT nANSWER)-adjustment nto nthe ninlet nimpeller npre nrotation nvanes
questions answered
2024 verified graded
A+ already passed!
the nefficiency nof nthe nrefrigerant ncycle nis naffected nby nthe noperation nof nthe ncondenser. nOf nthe nfollowing, na nmore nefficient ncentrifugal ncompressor noperation nresults nfrom n- n(CORRECT nANSWER)-lowering nthe ncondenser npressure
In nmost nsemi nhermetic ncompressors, nthe nsuction nvapor nis nused nfor n- n(CORRECT nANSWER)-cools nthe nmotor
The namount nof nrefrigerant nthat nflows nthrough nthe norifices nof nan neconomizer nis ndetermined nby nthe n- n(CORRECT nANSWER)-difference nbetween nthe nhigh nside nand nthe nlow nside npressure
the ninstalation nof nan ninline nrefrigerant ncleaning nsystem nis nadvisable n- n(CORRECT nANSWER)-to nremove nimpurities nfrom nthe nsystem a nrefrigerant nengineer nverifies nthat na ncondenser npump nis ncavitation nof nthe nfollowing nthe nmost nlikely ncause nfor nthis ncondition nis: n- n(CORRECT nANSWER)-a nfaulty ncooling ntower nwater nlevel ncontroller
when nan nexpansion nvalve nis noperating nproperly, nat nthe nend nof nthe nevaporator nwill ncontain
n- n(CORRECT nANSWER)-only nsuperheated nvapor
a ncentrifugal nwater npump nis nconsidered nto nbe nfully nprimed nwhen n- n(CORRECT nANSWER)-
the npump nis nfull nof nliquid
A nrefrigeration ncompressor nhas nfailed nto nturn non. nthe nengineer non nduty nverifies nthe nelectrical ncircuit nto nthe nmotor, nincluding nall nswitches nand ncircuit nbreakers nis ncomplete, naccording nto nrecomended nservice npractice, nthe nnext nitem nto nbe nchecked nwould nlikely nbe nthe: n- n(CORRECT nANSWER)-temperature nand npressure ncontrols
Refrigerants nare ncharacterized nby ntheir nphysical nproperties nincluding nFlashpoint, nrefrigeration neffect nand nothers, nof nthe nrefrigerants nin ncommercial nand nindustrial nthe nhighest nlatent nheat nand nrefrigerant neffect nis: n- n(CORRECT nANSWER)-ammonia
which nof nthe nfollowing nashrae nrefrigerant nsafety nclassification nis nthe nmost ntoxic n- n(CORRECT nANSWER)-b3
which nof nthe nfollowing nashrae nrefrigerant nsafety nclassification nis nthe nmost nflammable n- n(CORRECT nANSWER)-a3
in nq nindirect nrefrigeration nsystem,of nthe nfollowing, nthe none nthat nwould nnot nbe nused nas na ncooling nmedium nfor nbuilding nspaces nbeing ncooled nis n- n(CORRECT nANSWER)-r n22 n(cooling nmedium= nglycol nor nany nbrine nsolution)
the nprimary nway nof nachieving ncapacity ncontrol nof na nan ncentrifugal ncompressor nis nby: n- n(CORRECT nANSWER)-adjustment nto nthe ninlet nimpeller npre nrotation nvanes
