Exam (elaborations)
CWEA E1 Study Set| 137 Questions & 100% Correct Answers
- Course
- Institution
CWEA E1 Study Set| 137 Questions & 100% Correct Answers
[Show more]
Seller
Follow
Content preview
CWEA E1 Study Set| 137 Questions &100% Correct Answers
What happens when a motor loses one phase out of 3? - ✔✔Single phasing will cause the motor
to trip the overload heaters.
What does a Pitot tube do? - ✔✔Measures velocity of low to medium gas flow applications.
PH range? - ✔✔0-14
7 is neutral.
Less than 7 is acidic.
More than 7 is base (alkaline)
How long is a confined space permit valid for according to OSHA? - ✔✔No longer than it takes to
get the work done.
Entry permits are valid for more than one shift if permit info contains provisions covering shifts.
The voltage from phase to ground in a 480v transformer is? - ✔✔277 volts.
Signal range for pneumatics? - ✔✔3-15psi. 3-6-9-12-15
Intrinsic safety is? - ✔✔Barrier preventing excess voltage or current from reaching in hazardous area.
, How do you add capacitors in series? - ✔✔Same as resistors.
How many paths in a parallel circuit? - ✔✔More than 1.
Determined "Power Factor" formula. - ✔✔PF=kw/kva
If transformer primary=120v and secondary 12v=20 amps, what are the amps on the primary? -
✔✔2 amps.
Formula:
I =Amps/Volume of current
E = Volts/Force moving the current
P = Watts, Electrical power produced
I x E=P
12 x 20=240watts
In a transformer watts stay the same so now:
P/E=I
240/120v=2 amps
How long before digging do you notify "dig alert"? - ✔✔2 days.
Dig Alert number? - ✔✔811
What instrument do you use to measure 4-20 mA? - ✔✔DC clamp meter.
How do you connect an ammeter to check an electrical circuit? - ✔✔In series with the load.
An electronic tachometer works by? - ✔✔Receiving voltage pulses from and ignition signal.
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 KenAli. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.24. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
76658 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now