NCCER 26211-20 Test Questions with Answers
A motor is connected L1 to T1, L2 to T2, and L3 to T3. To reverse the motor, the leads need to be connected _____. - Answer-L1 to T3, L2 to T2, and L3 to T1
A motor overload relay consists of a current-sensing unit and a mechanism activated by the s...
NCCER 26211 -20 Test Questions with Answers A motor is connected L1 to T1, L2 to T2, and L3 to T3. To reverse the m otor, the leads need to be connected _____. - Answer -L1 to T3, L2 to T2, and L3 to T1 A motor overload relay consists of a current -sensing unit and a mechanism activated by the sensing unit that _____. - Answer -opens the motor circuit A shading coil is u sed to _____. - Answer -prevent contact chatter A single -pushbutton contact can be used to control the sequence of operation of several loads by using a _____. - Answer -multi -pole relay An opto -isolated solid state relay is activated by _____. - Answer -light Contacts that are apart when the relay is de -energized are said to be _____. - Answer -normally open If contactor action is dependent on current flow, the contactor is described as _____. - Answer -electrically held Increasing the armature spring forc e in a relay will result in _____. - Answer -higher drop-out values Low-voltage remote control switching relays _____. - Answer -use a split low -voltage coil Mechanically held relays and contactors are often used in auditoriums because _____. - Answer -they are quieter than electrically held devices Power to operate low -voltage switching systems is supplied by _____. - Answer -a transformer The lubrication of a large industrial motor at prescribed intervals can be accomplished using a _____. - Answer -timing relay The overload relays in machines associated with continuous processing typically activate a(n) _____. - Answer -alarm circuit The p anel for a low -voltage lighting control system enclosure should be mounted _____. - Answer -at eye level between two studs The symbol shown in the figure provided is used to denote a low -voltage _____. - Answer -transformer
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 Scholarsstudyguide. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $12.99. You're not tied to anything after your purchase.
