HVAC Excellence - ELECTRICITY Exam UPDATED ACTUAL Exam Questions and CORRECT Answers
2 views 0 purchase
Course
HVAC Excellence - ELECTRICITY
Institution
HVAC Excellence - ELECTRICITY
HVAC Excellence - ELECTRICITY Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Current flow is: - CORRECT ANSWER- The flow of electrons in the circuit.
Impedance is: - CORRECT ANSWER- Opposition to alternating current flow.
Like charges; - CORRECT ANSWER- repel each other
HVAC Excellence - ELECTRICITY Exam
UPDATED ACTUAL Exam Questions and
CORRECT Answers
Current flow is: - CORRECT ANSWER- ✔✔The flow of electrons in the circuit.
Impedance is: - CORRECT ANSWER- ✔✔Opposition to alternating current flow.
Like charges; - CORRECT ANSWER- ✔✔repel each other.
Any material that will readily release electrons is called; - CORRECT ANSWER- ✔✔A
conductor
The symbol for current is; - CORRECT ANSWER- ✔✔I
Which of the following materials would be best suited for use as a semi-conductor? -
CORRECT ANSWER- ✔✔silicon
The safety ground conductor is usually color coded; - CORRECT ANSWER- ✔✔green or
bare.
An electron has; - CORRECT ANSWER- ✔✔a negative charge.
Resistance is: - CORRECT ANSWER- ✔✔Opposition to current flow.
How many watts of power are used by a heater operating at 240 volts and drawing 5 amps? -
CORRECT ANSWER- ✔✔1200 watts
Which of the following meters must use its internal power to check a load or circuit? -
CORRECT ANSWER- ✔✔Ohmmeter
, In electrical wiring, a black colored wire in an alternating current circuit usually indicates; -
CORRECT ANSWER- ✔✔the hot conductor.
Fuses are sized by: - CORRECT ANSWER- ✔✔Volts & Amps
What would be the result, if a 24 volt, 20-ohm low voltage conta ctor coil were wired in
series with a 24 volt, 200-ohm control relay coil? - CORRECT ANSWER- ✔✔Only the
control relay would operate.
Three defrost heaters, each 15 ohms are wired in parallel to a 120 volt power supply. How
many watts of power will be used? - CORRECT ANSWER- ✔✔2880 Watts
Which of the following is generally considered to be within the maximum allowable (plus or
minus) supply voltage variation? - CORRECT ANSWER- ✔✔5%
Capacitors are rated in - CORRECT ANSWER- ✔✔Microfarads & Volts.
When testing a capacitor with an analog or digital ohmmeter, the meter should; - CORRECT
ANSWER- ✔✔measure low resistance then return to high reading.
What is the term used to describe the output side of a transformer? - CORRECT ANSWER-
✔✔Secondary side.
One horsepower is equal to __________ watts. - CORRECT ANSWER- ✔✔746
How much resistance must be placed in a 120 volt circuit in order to limit the current to 2
amps? - CORRECT ANSWER- ✔✔60 Ohms
A parallel circuit contains a 18 ohm and a 9 ohm resistor. The total resistance equals; -
CORRECT ANSWER- ✔✔6 ohms.
In a series circuit, the voltage drop across each resistance (load) will. - CORRECT
ANSWER- ✔✔add up to equal the source voltage.
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller MGRADES. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $9.99. You're not tied to anything after your purchase.
