# Nate Practice Questions

• posted on July 30, 2006, 2:27 pm
Studying for the Nate exam from a book from Dewalt called HVAC Technician Certification Guide. Some of the answers don't make sense. i.e....
The term "induced draft" most likely refers to:
a. A compressor
b. A type of control
c. A type of cooling tower
d. A type of test instrument.
The book says the correct answer is c. What is a cooling tower and how is it related to induced draft?
The pipe which connects the evaporator to the compressor is the:
a. Suction line
b. The liquid line
c. The discharge line
d. The hot gas line
Not to point out the obvious but the correct answer is a. The very next question says:
The pipe which connects the compressor to the condenser is:
a. Suction line
b. The liquid line
c. The discharge line
d. The hot gas line
The book says the correct answer is c. Why is it not also b?
A 125 pound cylinder of R22 is stored in a room at 80 degrees fahrenheit. The pressure in the cylinder should be:
a. 144 psig
b. 160 psig
c. 175 psig
d. 80 psig
The book says the correct answer is a. How is this answer arrived at? What is the math equation?
A frosted suction line on an air conditioning application indicates:
a. The system is overcharged
b. The system is undercharged
c. The suction line temperature is below the dew point of the ambient air and at or below 32 degrees fahrenheit
d. There is air in the system.
The book says the correct answer is c. Why is it not b?
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• posted on July 30, 2006, 2:52 pm

Your book is fucked on that one !

Hint al- the liquid line is past the condenser :-))

pt chart maybe?

think high superheat... umm ba ba comba ( assuming correct airflow ) of course :-)
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• posted on July 31, 2006, 2:15 am

The AC is on, but the house is warm. The likely solution is:
a. Open a window b. Add more of that freezon stuff c. Replace thermostat d. Call the AC guy that Ma and Pa use, he was plenty cheap last time he put some more of that freezon stuff in Ma's AC. Pa sure liked that.
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• posted on July 30, 2006, 5:00 pm

Not a very good assessment. Seems that it is more interested in trying to "trick" the student rather than find out what the student knows and can do.
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• posted on July 31, 2006, 12:11 am
wrote:

Did you get any of the answers wrong? I'd bet not. Knowing what the right answer is, and why is the whole purpose for the exam, isn't it? People fresh from tech school should have a hard time with the exam where the seasoned tech with some study should be able to pass the test easily.
...Ron -- 68'RS Camaro 88'Formula 00'GT Mustang
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• posted on July 30, 2006, 5:04 pm
Al Moran wrote:

See this link from BAC... one of the leading manufacturers of cooling towers... http://www.baltimoreaircoil.com/english/info_center/eBook/SectionFiles/OCT_Overiew.pdf
'Induced draft' generally means the fan is pulling air through cooling, or 'wet section' of the tower. 'Forced draft' generally means the fan is pushing air through the wet section.
Centrifugal fans are more commonly used in forced draft applications, while axials (with the fan mounted at the very top of the tower) are mostly used in induced applications.
Vicki could tell you more about cooling towers than you'd ever need to know....
Jake

To my knowledge, the compressor is not discharging liquid... if it did, we wouldn't need a condenser, would we?

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• posted on July 31, 2006, 2:00 am
Al Moran posted for all of us... I don't top post - see either inline or at bottom.

Check out a nuclear power plant. They have biggins
--
Tekkie

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• posted on July 31, 2006, 8:13 am

Duh..... Does this mean that the nutters who sit the exam and can't get the right answers stop playing with HVAC systems? Whoever the original poster was, I hope they don't have the ordacity to call themselves technicians or craftsmen? Thank goodness they usually don't get to work on anything associated with public health.....
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• posted on July 31, 2006, 1:02 pm
On Mon, 31 Jul 2006 18:13:54 +1000, "New Directions In Building

Oh, so you are perfect then. Go choke on some vegamite.
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• posted on August 3, 2006, 12:17 am

Thanks Al - I needed that - must have eaten the same batch as Mel Gibson!!!!!!!!! Please accept my apology
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• posted on August 1, 2006, 1:11 pm
"New Directions In Building Services \\(Australia\\)"

Actually, he calls himself new to the trade, and freely admits his inexperience. He comes here for advice in an effort to increase his knowledge and improve his skills. Pretty smart and humble on his part.
--
Respectfully, Bob

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• posted on August 1, 2006, 5:32 pm
And in such a moment, you find out who are the polite ones. And who are the trouble makers. I am also a relatively new tech, and have never tried to conceal that information.
--

Christopher A. Young
You can\'t shout down a troll.
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• posted on August 1, 2006, 9:19 pm

We know you're new. There's nothing wrong with being new and wanting to learn more. What ruffles feathers is when someone new attempts to dispense knowledge instead of sitting back and listening.
--
Respectfully, Bob

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• posted on August 1, 2006, 5:40 pm
On Tue, 01 Aug 2006 13:11:15 GMT, "Bob_Loblaw"

ROTFL!
-zero
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• posted on May 18, 2015, 12:05 pm