ESCO
A/C Exam Questions With Correct Answers
/ / / / / /
heat /which /causes /a /change /in /temperature /of /a /substance /is /called /- /verified /answer(s)-
✔✔sensible /heat
Heat /added /to /a /substance /without /a /rise /in /temperature /- /verified /answer(s)-
✔✔latent /heat /of /vaporization
Heat
/added
/to
/the /refrigerant /in /a /vapor /state /after /the /evaporation /process /is /called /- /verified /answer(s)-
✔✔superheat
scroll /compressor /move /refrigerant /by /- /verified /answer(s)-✔✔involute /spirals
the /movement /of /heat /by /way /of /fluid /is /called /- /verified /answer(s)-✔✔convection
the /movement /of /heat /by /direct /contact /is /- /verified /answer(s)-✔✔conduction
the /standard /unit /for /measuring /the /quantity /of /heat /in /a /substance /is /- /verified /answer(s)-
✔✔btu
refrigerant /gives /up /heat /when /- /verified /answer(s)-✔✔it /condenses
,why
/must
/refrigerant
/in /the /suction /line /be /slightly /warmer /than /the /saturation /temperature? /- /verified /answer(s)-
✔✔prevent /liquid /slugging /of /the /compressor
the /state /of /the /refrigerant /in /the /suction /line /should /be /- /verified /answer(s)-
✔✔low /pressure // /low /temperature /vapor
the /state /of /the /refrigerant /entering /the /condenser /is /- /verified /answer(s)-
✔✔high /pressure // /highly /superheated /vaoor
the /evaporator /- /verified /answer(s)-
✔✔Transfers /heat /from /the /refrigerated /space /to /the /refrigerant
which /of /the /following /is /not /a /thermodynamic /property /of /refrigerants /- /verified /answer(s)-
✔✔flammability
The /sequential /order /of /steps /in /the /vapor /compressions /process /are /- /verified /answer(s)-
✔✔compression, /condensation, /expansion, /vaporization
if /
a
/30
/pound
/cylinder
/of
/reclaimed /
R
/410 /
a
/refrigerant
, /has
/been
/stored
/overnight /at /70° /the /pressure /in /the /cylinder /should /be /approximately /- /verified /answer(s)-
✔✔201 /psig
fan /airflow /pressures /are /usually /measured /in /- /verified /answer(s)-
✔✔inches /of /water /column
0 /pounds /per /square /inch /absolute /is /- /verified /answer(s)-
✔✔A /pressure /which /cannot /be /further /reduced
0 /pounds /per /square /inch /gauge /is /- /verified /answer(s)-
✔✔The /same /as /atmospheric /pressure
The
/temperature
/at /which /moisture /will /start /to /condense /from /the /air /is /called /- /verified /answer(s)-
✔✔Dewpoint /temperature
compound /pressure /gauge /measures /- /verified /answer(s)-✔✔pressure /and /vacuum
mechanical /shaft /seal /is /necessary /on /a /- /verified /answer(s)-✔✔Open /Drive /compressor
liquid /slugging /is /- /verified /answer(s)-
✔✔liquid /refrigerant /in /the /compressor /clearance /space
The /clearance /space /in /reciprocating /compressor /- /verified /answer(s)-
✔✔has /an /effect /on /compressor /capacity
A/C Exam Questions With Correct Answers
/ / / / / /
heat /which /causes /a /change /in /temperature /of /a /substance /is /called /- /verified /answer(s)-
✔✔sensible /heat
Heat /added /to /a /substance /without /a /rise /in /temperature /- /verified /answer(s)-
✔✔latent /heat /of /vaporization
Heat
/added
/to
/the /refrigerant /in /a /vapor /state /after /the /evaporation /process /is /called /- /verified /answer(s)-
✔✔superheat
scroll /compressor /move /refrigerant /by /- /verified /answer(s)-✔✔involute /spirals
the /movement /of /heat /by /way /of /fluid /is /called /- /verified /answer(s)-✔✔convection
the /movement /of /heat /by /direct /contact /is /- /verified /answer(s)-✔✔conduction
the /standard /unit /for /measuring /the /quantity /of /heat /in /a /substance /is /- /verified /answer(s)-
✔✔btu
refrigerant /gives /up /heat /when /- /verified /answer(s)-✔✔it /condenses
,why
/must
/refrigerant
/in /the /suction /line /be /slightly /warmer /than /the /saturation /temperature? /- /verified /answer(s)-
✔✔prevent /liquid /slugging /of /the /compressor
the /state /of /the /refrigerant /in /the /suction /line /should /be /- /verified /answer(s)-
✔✔low /pressure // /low /temperature /vapor
the /state /of /the /refrigerant /entering /the /condenser /is /- /verified /answer(s)-
✔✔high /pressure // /highly /superheated /vaoor
the /evaporator /- /verified /answer(s)-
✔✔Transfers /heat /from /the /refrigerated /space /to /the /refrigerant
which /of /the /following /is /not /a /thermodynamic /property /of /refrigerants /- /verified /answer(s)-
✔✔flammability
The /sequential /order /of /steps /in /the /vapor /compressions /process /are /- /verified /answer(s)-
✔✔compression, /condensation, /expansion, /vaporization
if /
a
/30
/pound
/cylinder
/of
/reclaimed /
R
/410 /
a
/refrigerant
, /has
/been
/stored
/overnight /at /70° /the /pressure /in /the /cylinder /should /be /approximately /- /verified /answer(s)-
✔✔201 /psig
fan /airflow /pressures /are /usually /measured /in /- /verified /answer(s)-
✔✔inches /of /water /column
0 /pounds /per /square /inch /absolute /is /- /verified /answer(s)-
✔✔A /pressure /which /cannot /be /further /reduced
0 /pounds /per /square /inch /gauge /is /- /verified /answer(s)-
✔✔The /same /as /atmospheric /pressure
The
/temperature
/at /which /moisture /will /start /to /condense /from /the /air /is /called /- /verified /answer(s)-
✔✔Dewpoint /temperature
compound /pressure /gauge /measures /- /verified /answer(s)-✔✔pressure /and /vacuum
mechanical /shaft /seal /is /necessary /on /a /- /verified /answer(s)-✔✔Open /Drive /compressor
liquid /slugging /is /- /verified /answer(s)-
✔✔liquid /refrigerant /in /the /compressor /clearance /space
The /clearance /space /in /reciprocating /compressor /- /verified /answer(s)-
✔✔has /an /effect /on /compressor /capacity
