ESCO Air Conditioning Exam (2025) Actual Exam Questions and Answers A+ Graded.

ESCO Air Conditioning Exam (2025)
Actual Exam Questions and Answers A+
Graded




Heat .which .causes .a .change .in .temperature .of .a .substance .is .called .-
.CORRECT .ANSWER-Sensible .heat


Heat .added .to .a .substance .without .a .rise .in .temperature .- .CORRECT .ANSWER-
Latent .heat

Heat .added .to .the .refrigerant .in .a .vapor .state .after .the .evaporation .process .is
.called .- .CORRECT .ANSWER-Superheat


Scroll .compressor .move .refrigerant .by .- .CORRECT .ANSWER-Involute .Spirals

The .movement .of .heat .by .way .of .fluid .is .called .- .CORRECT .ANSWER-
Convection

The .movement .of .heat .by .direct .contact .is .- .CORRECT .ANSWER-Conduction

The .standard .unit .for .measuring .the .quantity .of .heat .in .a .substance .is .-
.CORRECT .ANSWER-BTUs


Refrigerant .gives .up .heat .when .- .CORRECT .ANSWER-It .condenses

Why .must .refrigerant .in .the .suction .line .be .slightly .warmer .than .the .saturation
.temperature? .- .CORRECT .ANSWER-Prevent .liquid .slugging .of .the .compressor


The .state .of .the .refrigerant .in .the .suction .line .should .be .- .CORRECT .ANSWER-
Low .pressure ./ .Low .temperature .vapor

The .state .of .the .refrigerant .entering .the .condenser .is .- .CORRECT .ANSWER-
High .pressure ./ .Highly .superheated .vapor

The .evaporator .- .CORRECT .ANSWER-Transfers .heat .from .the .refrigerated
.space .to .the .refrigerant

, Which .of .the .following .is .not .a .thermodynamic .property .of .refrigerants .-
.CORRECT .ANSWER-Flammability


The .sequential .order .of .steps .in .the .vapor .compressions .process .are .-
.CORRECT .ANSWER-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 .-
.CORRECT .ANSWER-201 .psig


Fan .airflow .pressures .are .usually .measured .in .- .CORRECT .ANSWER-Inches .of
.water .column


0 .pounds .per .square .inch .absolute .is .- .CORRECT .ANSWER-A .pressure .which
.cannot .be .further .reduced


0 .pounds .per .square .inch .gauge .is .- .CORRECT .ANSWER-The .same .as
.atmospheric .pressure


The .temperature .at .which .moisture .will .start .to .condense .from .the .air .is .called
.- .CORRECT .ANSWER-Dew .point .temperature


A .compound .pressure .gauge .measures .- .CORRECT .ANSWER-Pressure .and
.vacuum


Mechanical .shaft .seal .is .necessary .on .a .- .CORRECT .ANSWER-Open .drive
.compressor


Liquid .slugging .is .- .CORRECT .ANSWER-Liquid .refrigerant .in .the .compressor
.clearance .space


The .clearance .space .in .reciprocating .compressor .- .CORRECT .ANSWER-Has .an
.effect .on .compressor .capacity


Which .of .the .following .types .of .air .conditioning .compressor .is .most .energy-
efficient .- .CORRECT .ANSWER-Scroll

Which .of .the .following .represent .the .right .order .for .the .functions .of .a
.condenser .- .CORRECT .ANSWER-De-superheat, .Condenses, .Subcools


Refrigerant .R .134a .vapor .enters .the .condenser .at .124 .psi .G, .100°F. .it .leaves .as
.a .liquid .from .the .condenser .subcooled .20°F .and .the .pressure .will .be
.approximately .- .CORRECT .ANSWER-87 .psig


There .are .three .basic .types .of .condensers, .air-cooled, .water-cooled .and .the
._____________ .cooled .- .CORRECT .ANSWER-Evaporative


10 .pounds .of .refrigerant .passing .through .a .water .cooled .condenser .will .lose .20
.BTUs .of .heat .per .pound. .If .10 .pounds .of .water .passes .through .the .condenser