NATE Final Exam #1
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 answers D: Parallel to the
compressor
cranksha
ft
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 answers 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 answers 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 answers 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 answers D: Refrigerant
toxicity and
flammabili
ty
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 less than or equal to 400
concentrations
•ppm;
Class B signifies refrigerants for which there is evidence of toxicity at
concentrations
below 400
• Class 1 indicates refrigerants that do not show flame propagation when
ppm.
tested
21°C andin101
air at
• Class 2 indicates refrigerants having a lower flammability limit of more than
kPa;
at0.10
21°Ckg/m3
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 limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa
flammability
or a heat of greater than or equal to 19
combustion
kJ/kg.
What control would you use on a capillary tube or automatic expansion
valve system
maintain to
the desired
temperature?
A: Dual pressure
control
B: High pressure
control
C: Thermostatic temperature
control
D: Low pressure control correct answers C: Thermostatic
temperature control
The total heat contained in any substance is obtained by adding
together its:
A: Radiant and specific
heat
B: Latent and sensible
heat
C: Radiant and sensible
heat
D: Specific and latent heat correct answers B: Latent and
sensible heat
An outdoor air conditioning condensing unit should not be
located:
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 answers D: Parallel to the
compressor
cranksha
ft
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 answers 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 answers 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 answers 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 answers D: Refrigerant
toxicity and
flammabili
ty
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 less than or equal to 400
concentrations
•ppm;
Class B signifies refrigerants for which there is evidence of toxicity at
concentrations
below 400
• Class 1 indicates refrigerants that do not show flame propagation when
ppm.
tested
21°C andin101
air at
• Class 2 indicates refrigerants having a lower flammability limit of more than
kPa;
at0.10
21°Ckg/m3
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 limit of less than or equal to 0.10 kg/m3 at 21°C and 101 kPa
flammability
or a heat of greater than or equal to 19
combustion
kJ/kg.
What control would you use on a capillary tube or automatic expansion
valve system
maintain to
the desired
temperature?
A: Dual pressure
control
B: High pressure
control
C: Thermostatic temperature
control
D: Low pressure control correct answers C: Thermostatic
temperature control
The total heat contained in any substance is obtained by adding
together its:
A: Radiant and specific
heat
B: Latent and sensible
heat
C: Radiant and sensible
heat
D: Specific and latent heat correct answers B: Latent and
sensible heat
An outdoor air conditioning condensing unit should not be
located:
