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Practice Reading: Reading and Writing Fill in the Blanks ID: #51292 Composite Materials
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Below is a text with blanks. Click on each blank, a list of choices will appear. Select the appropriate choice for each blank.
* Select the correct answer into all dropdown fields. You need to answer all questions before clicking verify button.
Airplane    have  been  changing  over  from  aluminum  to  advanced  composite  .  These  lighter,  stronger  composites  are  made  of  fibers  of  carbon  or  glass  embedded  in  a  second  material,  often  plastic.  One  advantage  is  that  composite-based  planes  use  significantly  less  fuel.  But  there's  an  important  disadvantage.  When  aluminum  is  hit,  you  can  see  a  dent.  ,  though,  spring  back  to  the  original  shape,  which  could  hide  internal  damage.  One  technique  to  test  composite  material  takes  advantage  of  heat  transfer.  Inspectors  place  large  heaters  next  to  a  section  of  the  plane.  Any  cracks  will  alter  the  flow  of  heat,  and  these  changes  can  be  picked  up  with  a  heat-sensitive  camera.  But  this    bulky  and  expensive  .  Now  M.I.T.  researchers  have  designed  a  new  system.  All  you  need  is  carbon    included  in  the  composite,  because  nanotubes  will  heat  up  in  response  to  a  small  electric  current.  This  can  be  produced  with  a  handheld  device.  Any  internal  deformations  will  still  change  the  heat  flow,  which  can  be  picked  up  by  the  thermal  camera.  The  research  was  published  in  the  journal  Nanotechnology.  This  technique  offers  the  ability  to  detect  very  small  cracks—which  could  help  keep  passengers  safer  in  the  skies.

Result:

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Correct answer: manufacturers

Explanation: The term 'manufacturers' fits grammatically as a plural noun that refers to the companies producing airplanes, aligning with the subject of the sentence. It also provides a contextual understanding of who is responsible for the changes in airplane materials.

Meaning: 'Manufacturers' are companies or individuals that produce goods, in this case, airplanes.

Wrong options:

  • tractors: 'Tractors' refers to a type of vehicle and does not relate to the context of airplane production.
  • marvels: 'Marvels' implies something wonderful or astonishing, which does not fit as a subject in this context.
  • introductions: 'Introductions' refers to the act of presenting something, which does not align with the subject of airplane production.
Correct answer: materials

Explanation: The word 'materials' is a plural noun that correctly identifies the substances used in airplane construction, fitting both grammatically and contextually within the sentence.

Meaning: 'Materials' refers to the substances or components used to create something, in this case, the advanced composites used in airplanes.

Wrong options:

  • millennials: 'Millennials' refers to a generation and is irrelevant to the context of airplane materials.
  • antibacterials: 'Antibacterials' refers to substances that kill bacteria, which does not relate to the context of airplane construction.
  • ethereals: 'Ethereals' suggests something delicate or insubstantial, which does not fit the context of solid materials used in airplanes.
Correct answer: Composites

Explanation: The term 'Composites' is a plural noun that refers to the materials being discussed, fitting grammatically and contextually as it directly relates to the subject of the sentence regarding airplane materials.

Meaning: 'Composites' are materials made from two or more constituent materials with significantly different physical or chemical properties, used here to describe the materials in airplane construction.

Wrong options:

  • Convergence: 'Convergence' refers to the process of coming together, which does not fit the context of materials in airplanes.
  • Epiglottis: 'Epiglottis' is a part of the throat and is unrelated to the context of airplane materials.
  • Quadrants: 'Quadrants' refers to sections or divisions, which does not relate to the context of airplane materials.
Correct answer: involves

Explanation: The word 'involves' is a verb that correctly indicates the action of requiring something, fitting grammatically and contextually within the sentence as it describes the process being discussed.

Meaning: 'Involves' means to include or require as a necessary part, indicating that the testing process requires bulky and expensive equipment.

Wrong options:

  • restaurants: 'Restaurants' refers to places where food is served, which does not fit the context of testing equipment.
  • shocks: 'Shocks' implies a sudden impact or surprise, which does not relate to the context of the testing process.
  • squads: 'Squads' refers to groups of people, which is irrelevant to the context of the testing process.
Correct answer: equipment

Explanation: The term 'equipment' is a noun that accurately describes the tools or machinery needed for the testing process, fitting grammatically and contextually within the sentence.

Meaning: 'Equipment' refers to the necessary tools or machinery used for a specific purpose, in this case, for testing composite materials in airplanes.

Wrong options:

  • biggest: 'Biggest' is an adjective that describes size and does not fit as a noun in this context.
  • linkage: 'Linkage' refers to a connection or relationship, which does not relate to the context of testing tools.
  • devilment: 'Devilment' refers to mischievous behavior, which is irrelevant to the context of testing equipment.
Correct answer: nanotubes

Explanation: The word 'nanotubes' is a plural noun that refers to a specific type of material used in the composite, fitting grammatically and contextually as it describes what is included in the composite material.

Meaning: 'Nanotubes' are cylindrical structures made of carbon atoms, known for their strength and electrical properties, used here in the context of enhancing composite materials.

Wrong options:

  • reboots: 'Reboots' refers to restarting a system, which does not fit the context of materials in airplane construction.
  • refuse: 'Refuse' means to decline or reject, which does not relate to the context of materials used in composites.
  • persecutes: 'Persecutes' means to harass or oppress, which is irrelevant to the context of materials in airplane construction.

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