The normal dividing line for voltage changes in a schematic is the
___________________ - ANSWERS-Transformer
The part of a schematic that lists and explains the system components is called
the ______________ - ANSWERS-Legend
Relays and contactors are ______________________ control switches -
ANSWERS-Electrically operated
A _______________ circuit allows the same current to flow through all of the
components - ANSWERS-Series
A _____________ circuit has multiple paths for current flow - ANSWERS-Parallel
What types of circuits are primarily used in control and safety applications? -
ANSWERS-Series-parellel
When testing with a voltmeter, you should place the meter _________________ -
ANSWERS-In parallel with the circuit being tested
,What does a resistance reading of 0 ohms mean? - ANSWERS-There is a short
circuit
When you use an ohmmeter, the circuit being measured must be
__________________ - ANSWERS-Isolated from all energy sources
When you test a switch with an ohmmeter, a reading of _______________
indicates that the switch is closed - ANSWERS-0 ohms
ON all meters, digital and analog, the scale used should indicate the measurement
_________________ - ANSWERS-Close to the middle of the range
When testing across a closed switch in an energized circuit, you should read
_______________ - ANSWERS-0 V AC
When using a standard clamp-on ammeter, you should _________________
before taking a reading - ANSWERS-Make sure that the jaws are closed
When testing compressor windings, you take the following readings: C to R: 2
ohms, C to S: infinite resistance, R to S: infinite resistance.... What is the
diagnosis? - ANSWERS-The start winding is open
Capacitance meters must be used on capacitors _________________ - ANSWERS-
That have been removed from the circuit
, When testing a thermostat wire that has been removed from the circuit, you
measure 0 ohms between red and white. This indicates that _________________
- ANSWERS-There is a short
When testing with an ammeter, you should place the meter
____________________ - ANSWERS-In series with the circuit being tested
Lever tubing benders are best used for: - ANSWERS-Soft drawn copper tubbing
The primary purpose for bringing outdoor air into residential air distribution
system is to: - ANSWERS-Provide fresh air to a conditioned space
What motor design is used on a variable speed motor? - ANSWERS-Brushless DC
Assuming that a circuit is energized, what voltage will be read across an open
switch? - ANSWERS-Applied voltage
The input side of a step-down transformer is also properly called the: - ANSWERS-
primary side
Electrical current is measured in - ANSWERS-amperes
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 Teacher101. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $17.99. You're not tied to anything after your purchase.