NATE Exam: Core Essentials/ 121 Q&A/ A+ Score Solution/ Newly Updated. Terms like:
How fast does air with a velocity pressure of 0.20 in. w.g. move through a round duct?
a. 400 ft/min
b. 1,200 ft/min
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity p...
NATE Exam: Core Essentials/ 121 Q&A/ A+
Score Solution/ Newly Updated.
How fast does air with a velocity pressure of 0.20 in. w.g. move through a round duct?
a. 400 ft/min
b. 1,200 ft/min
c. 1,600 ft/min
d. 1,800 ft/min
Note: Velocity = 4005 x (the square root of velocity pressure) - Answer: d (1,800 ft/min)
How fast does air with a velocity pressure of 0.20 in w.g. move through a square duct?
a. 400 ft/min
b. 1,200 ft/min
c. 1,600 ft/min
d. 1,800 ft/min
Page 1 of 33
,Note: Velocity = 4005 x (the square root of velocity pressure) - Answer: d (1,800 ft/min)
Customers depend on you to be ____.
a. honest
b. loyal
c. patient
d. all of the above - Answer: d (all of the above: honest, loyal, patient)
Before leaving a service call, you should be sure to ____.
a. ask the customer for referrals
b. collect payment in cash if possible
c. demonstrate system operation and describe basic maintenance procedures to the customer
d. try to sell the customer an equipment upgrade - Answer: c (demonstrate system operation
and describe basic maintenance procedures to the customer)
What is the advantage of using a tube cutter to cut copper pipe?
a. It can cut hard or soft drawn copper
b. It leaves no metal shavings to contaminate the system
c. It produces a clean, square cut
d. All of the above - Answer: d (All of the above: it can cut hard or soft drawn copper; it leaves
no metal shavings to contaminate the system; it produces a clean, square cut.)
Spring-type benders may be used on ____.
a. soft drawn copper
b. hard drawn copper
Page 2 of 33
,c. all copper pipe
d. steel pipe - Answer: a (soft drawn copper)
A flaring tool is used to ____.
a. make a mechanical joint in tubing
b. measure pipe diameters
c. remove burrs from piping
d. solder tubing without the use of coupling - Answer: a (make a mechanical joint in tubing)
A swaging tool is used to ____.
a. cut copper tubing
b. make a mechanical joint in tubing
c. remove burrs from piping
d. solder tubing without the use of couplings - Answer: d (solder tubing without the use of
couplings)
What is one of the advantages of a glass-stem thermometer?
a. It is very accurate
b. It is very durable
c. It comes with a digital readout
d. Non of the above - Answer: a (It is very accurate)
In discussing human comfort, the temperature most commonly referred to is ____.
a. dew point
b. dry-bulb
Page 3 of 33
, c. wet-bulb
d. Fahrenheit - Answer: b (dry-bulb)
A sling psychrometer uses two glass-stem thermometers. One measures dry-bulb, and the other
measures ____.
a. dew point
b. enthalpy
c. relative humidity
d. wet-bulb - Answer: d (wet-bulb)
A standard refrigeration manifold uses what type of element to measure pressure?
a. Bellows
b. Bourdon tube
c. Diaphragm
d. Spring - Answer: b (Bourdon tube)
What is the pressure range of a standard compound gauge on a refrigerant manifold?
a. 0 to 350 psig
b. 0 to 500 psig
c. 30 in. Hg to 350 psig
d. 30 in. Hg to 500 psig - Answer: c (30 in. Hg to 350 psig)
What is the best tool for removing moisture and non-condensibles from a system before adding
refrigerant?
a. Manifold gauge
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