Read these English anecdotes and maybe smile today? Start your FREE email English course now!
Web English-test.net

English grammar tests
easy  medium  advanced
English synonym tests
easy  medium  advanced
Business English tests
easy  medium  advanced
English idiom tests
easy  medium  advanced
Common error tests
easy  medium  advanced
email this test to a friend add bookmark Help: How to take this test? PDF version business quiz
Business English Exercises
 

Nanotube Technology

Answers to test questions and links to explanations

Home > Teaching Business English > Business English Lessons, Advanced Level # 249
previous business test PDF version next

 All tests  TOP 100  Forum  Dictionaries Ask a Teacher

CNTs (carbon nanotubes) have probably been around for a lot longer than was first realized, but electron microscopy at that time was not advanced enough to distinguish them from other types of tubes.

Correct answer: (c) electron

Meaning of "electron"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

Join our English Learning Community! — Make new friends today!
   Find penpals and make new friends today!

 english vocabulary, grammar and idioms Ask a Teacher

The first method for producing CNTs and fullerenes in reasonable quantities was by applying an electric current across two carbonaceous electrodes in an inert gas atmosphere.

Correct answer: (a) reasonable

Meaning of "reasonable"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

501 Business English Exercises — Printable, photocopiable.
For use in a classroom, at home, on your PC or anywhere.

 esl lesson plans in 6 short stories with exercises Ask a Teacher

This method is called plasma arcing: it involves the evaporation of one electrode as cations followed by deposition at the other electrode.

Correct answer: (b) deposition

Meaning of "deposition"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

Start improving your listening skills today!  — Take these listening exercises now.

 have you ever heard about phrasebase? Ask a Teacher

The carbon arc discharge method is the most common and easiest way to produce CNTs, but it produces a complex mixture of components and requires further purification to separate the CNTs from the soot and the residual catalytic metals present in the crude product.

Correct answer: (d) residual

Meaning of "residual"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

Start FREE email English course now! — Join more than 100,000 learners!


 english for beginners Ask a Teacher

This method creates CNTs through arc-vaporization of two carbon rods placed end to end, separated by approximately 1mm, in an enclosure that is usually filled with inert gas at low pressure.

Correct answer: (b) inert

Meaning of "inert"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

Pimsleur English ESL/EFL — Learning English can
be fun. Try this audio program and you will make progress fast.

 language is a cycle Ask a Teacher

Another method of nanotube synthesis involves plasma arcing in the presence of cobalt with a 3% or greater concentration.

Correct answer: (c) presence

Meaning of "presence"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

 british vs. american english Ask a Teacher

The nanotube product is a compact cathode deposit of rod-like morphology.

Correct answer: (c) morphology

Meaning of "morphology"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

 want to learn english language through hip-hop? Ask a Teacher

However, when cobalt is added, the nature of the product changes to a web, with strands of 1mm or so thickness that stretch from the cathode to the walls of the reaction vessel.

Correct answer: (b) vessel

Meaning of "vessel"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

 vocabulary games: english adverb quiz Ask a Teacher

The mechanism by which cobalt changes this process is unclear, however one possibility is that such metals affect the local electric fields and hence the formation of the five-membered rings.

Correct answer: (d) mechanism

Meaning of "mechanism"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

 esl english vocabulary: verb noun adjective lists Ask a Teacher

Arc-discharge and laser vaporization are currently the principal methods for obtaining small quantities of high quality CNTs, but both methods suffer from drawbacks: the CNTs are difficult to purify, manipulate, and assemble for building nanotube-device architectures for practical applications.

Correct answer: (d) drawbacks

Meaning of "drawbacks"
Dictionary.com   Cambridge Dictionaries   Merriam-Webster   Answers.com

Translate sentence with Google language tool
 
Translate with Ectaco online dictionary

Go to Question esl test: nanotube technology (answers)

 Back to top


Business English Practice Exercises Business English Tests — several topics are covered: office matters, job applications, computer English, money expressions, business law, operations management, retail marketing, e-commerce, accounting terms, contracts and agreements, commercial correspondence, etc.
You will be exposed to a wealth of authentic sample sentences that include a great variety of themes. This compact Business English Test Package is the only printable English test collection currently available on the Internet. It contains 501 Business English Exercises (10 questions per test plus answer keys).  Get your unique Business English Practice Exercises now!

  FREE email English course with 218674 Subscribers    
 
name email
 

Search results:

Free English test

You will find everything related to your search phrase "Free English test" on our vocabulary building pages such as parts of speech (nouns, adjectives, adverbs, prepositions, pronouns, conjunctions, modifiers, etc.), common words, idioms, phrases and expressions, word definitions from online dictionaries, free word and sentence translation, grammar structures and much more.

  • TOEIC — Test Of English for International Communication (3420 words, 684 tests, intermediate level)
  • GRE — Graduate Record Examination (3750 words, 750 tests, intermediate level)
  • SAT — Scholastic Assessment Test (5010 words, 1002 tests, intermediate level)
  • TOEFL — Test Of English as a Foreign Language (600 words, 120 tests, advanced level)
  • GMAT — Graduate Management Admission Test (1400 words, 280 tests, advanced level)

 

To link to English-Test.net from your website, simply cut and paste the following code to your web page.

It will appear on your page as
Business English Lesson — Learn English Online at English-Test.net
English Tests for TOEFL, TOEIC, GMAT, GRE, SAT, PCAT, MCAT, ASVAB, ESL/EFL copyright © 2003—2012 english-test.net