ESCO
Air
/
Conditioning
/
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
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)-
✔✔BTUs
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 /vapor
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)-
✔✔Dew /point /temperature
A /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
Air
/
Conditioning
/
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
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)-
✔✔BTUs
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 /vapor
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)-
✔✔Dew /point /temperature
A /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
