NATE Final Exam 1 Questions And
Answers Latest Update 2025 Already
Graded A+
Generally, .vibration .eliminators .in .piping .should .be .installed: .
. A: .At .a .45 .degree .angle
. B: .At .a .90 .degree .angle
. C: .Perpendicular .to .the .compressor .crankshaft
D: .Parallel .to .the .compressor .crankshaft .- .CORRECT .ANSWER-D: .Parallel .to .the
.
compressor .crankshaft
.
If .you .purchased .ten .filter-driers .for .$100.00, .what .was .the .price .of .each .filter-
drier? .
. A: .$100.00
. B: .$10.00
. C: .$1.00
. D: .$1.10 .- .CORRECT .ANSWER-B: .$10.00
Which .of .the .following .jobs .requires .safety .glasses? .
. A: .Driving .a .vehicle
. B: .Extending .a .ladder
. C: .Brazing
. D: .Pulling .thermostat .wire .- .CORRECT .ANSWER-C: .Brazing
Which .of .the .following .instruments .would .typically .be .used .to .measure .a
.vacuum? .
, . A: .Micron .gauge
. B: .Thermostat
. C: .Anemometer
. D: .Differential .pressure .gauge .- .CORRECT .ANSWER-A: .Micron .gauge
ASHRAE .Standard .34 .deals .with: .
. A: .Carbon .monoxide .safety .levels
. B: .Refrigerant .quality
. C: .Equipment .room .ventilation .and .alarms
D: .Refrigerant .toxicity .and .flammability .- .CORRECT .ANSWER-D: .Refrigerant
.
toxicity .and .flammability
.
ANSI/ASHRAE .34 .published .in .2001 .and .entitled ."Designation .and .Safety
.Classification .of .Refrigerants".
• .Class .A .signifies .refrigerants .for .which .toxicity .has .not .been .identified .at
.concentrations .less .than .or .equal .to .400 .ppm;
• .Class .B .signifies .refrigerants .for .which .there .is .evidence .of .toxicity .at
.concentrations .below .400 .ppm.
• .Class .1 .indicates .refrigerants .that .do .not .show .flame .propagation .when .tested
.in .air .at .21°C .and .101 .kPa;
• .Class .2 .indicates .refrigerants .having .a .lower .flammability .limit .of .more .than
.0.10 .kg/m3 .at .21°C .and .101 .kPa .and .a .heat .of .combustion .of .less .than .19 .kJ/kg;
• .Class .3 .indicates .refrigerants .that .are .highly .flammable .as .defined .by .a .lower
.flammability .limit .of .less .than .or .equal .to .0.10 .kg/m3 .at .21°C .and .101 .kPa .or .a
.heat .of .combustion .greater .than .or .equal .to .19 .kJ/kg.
What .control .would .you .use .on .a .capillary .tube .or .automatic .expansion .valve
.system .to .maintain .the .desired .temperature?
.
. A: .Dual .pressure .control
. B: .High .pressure .control
. C: .Thermostatic .temperature .control
D: .Low .pressure .control .- .CORRECT .ANSWER-C: .Thermostatic .temperature
.
control
.
The .total .heat .contained .in .any .substance .is .obtained .by .adding .together .its: .
. A: .Radiant .and .specific .heat
Answers Latest Update 2025 Already
Graded A+
Generally, .vibration .eliminators .in .piping .should .be .installed: .
. A: .At .a .45 .degree .angle
. B: .At .a .90 .degree .angle
. C: .Perpendicular .to .the .compressor .crankshaft
D: .Parallel .to .the .compressor .crankshaft .- .CORRECT .ANSWER-D: .Parallel .to .the
.
compressor .crankshaft
.
If .you .purchased .ten .filter-driers .for .$100.00, .what .was .the .price .of .each .filter-
drier? .
. A: .$100.00
. B: .$10.00
. C: .$1.00
. D: .$1.10 .- .CORRECT .ANSWER-B: .$10.00
Which .of .the .following .jobs .requires .safety .glasses? .
. A: .Driving .a .vehicle
. B: .Extending .a .ladder
. C: .Brazing
. D: .Pulling .thermostat .wire .- .CORRECT .ANSWER-C: .Brazing
Which .of .the .following .instruments .would .typically .be .used .to .measure .a
.vacuum? .
, . A: .Micron .gauge
. B: .Thermostat
. C: .Anemometer
. D: .Differential .pressure .gauge .- .CORRECT .ANSWER-A: .Micron .gauge
ASHRAE .Standard .34 .deals .with: .
. A: .Carbon .monoxide .safety .levels
. B: .Refrigerant .quality
. C: .Equipment .room .ventilation .and .alarms
D: .Refrigerant .toxicity .and .flammability .- .CORRECT .ANSWER-D: .Refrigerant
.
toxicity .and .flammability
.
ANSI/ASHRAE .34 .published .in .2001 .and .entitled ."Designation .and .Safety
.Classification .of .Refrigerants".
• .Class .A .signifies .refrigerants .for .which .toxicity .has .not .been .identified .at
.concentrations .less .than .or .equal .to .400 .ppm;
• .Class .B .signifies .refrigerants .for .which .there .is .evidence .of .toxicity .at
.concentrations .below .400 .ppm.
• .Class .1 .indicates .refrigerants .that .do .not .show .flame .propagation .when .tested
.in .air .at .21°C .and .101 .kPa;
• .Class .2 .indicates .refrigerants .having .a .lower .flammability .limit .of .more .than
.0.10 .kg/m3 .at .21°C .and .101 .kPa .and .a .heat .of .combustion .of .less .than .19 .kJ/kg;
• .Class .3 .indicates .refrigerants .that .are .highly .flammable .as .defined .by .a .lower
.flammability .limit .of .less .than .or .equal .to .0.10 .kg/m3 .at .21°C .and .101 .kPa .or .a
.heat .of .combustion .greater .than .or .equal .to .19 .kJ/kg.
What .control .would .you .use .on .a .capillary .tube .or .automatic .expansion .valve
.system .to .maintain .the .desired .temperature?
.
. A: .Dual .pressure .control
. B: .High .pressure .control
. C: .Thermostatic .temperature .control
D: .Low .pressure .control .- .CORRECT .ANSWER-C: .Thermostatic .temperature
.
control
.
The .total .heat .contained .in .any .substance .is .obtained .by .adding .together .its: .
. A: .Radiant .and .specific .heat
