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  1. Explain the meaning of: adjust, dehydrate, emulsify, filter; moisten; suspend.

  1. Translate the following sentences paying attention to the compound preposition (составной предлог) due to (благодаря, из-за, в силу) or phrase be due to (быть должным, являться результатом, быть обусловленным).

      1. However, soon after the war the production of high sulphur crudes increased significantly, which gave a more stringent (узкий) demand on the product blending flexibility (гибкость) of refineries, and the marketing specifications for the products became tighter (строже), largely due to environmental considerations.

      2. If excess (избыток) oxygen enters these processes, it is possible for a fire to occur in the settler due to the generation of static electricity, which acts as the ignition source.

      3. Inspections and testing should be considered where the possibility exists for valve failure due to contaminants in the hydrogen.

      4. It has been shown that catalyst activity loss (потеря) due to metals is caused primarily by vanadium deposition, and increased coke and hydrogen formation is due to nickel deposited on the catalyst.

  1. Translate the following sentences paying attention to the words fail (verb), failure (noun). Construction fail + Infinitive means не … (не удаваться, не суметь сделать, etc.); failure – повреждение, выход из строя, неисправность, отказ, сбой; failure + Infinitive – неспособность.

  1. As a heating fuel, it is sometimes used as a heat source during power failures.

  2. In cold climates, too little volatility results in cars failing to start. In hot climates, excessive volatility results in what is known as "vapour lock" where combustion fails to occur.

  3. Occasionally the failure of a valve to perform its function properly results in a failure of the pipeline system elsewhere.

  4. One of the most common operating problems is failure to open at set pressure, because of plugging of the valve inlet or outlet, or because corrosion prevents proper equipment operation.

  1. Translate the following sentences paying attention to the constructions can, may, might, should + Infinitive Passive.

  1. Bitumen may be regarded as colloidal system of highly condensed aromatic particles (asphaltenes) suspended in a continuous oil phase.

  2. It should be noted that pipelines can also be attacked by corrosive products, such as hydrogen sulfides, CO2, that might be contained in products transported.

  3. Motor gasoline may be stored up (хранить) to 60 days in an approved container. If it is to be stored for a longer period of time, a fuel stabilizer may be used.

  4. The liquid hydrocarbon disulfides may remain in the sweetened products, they may be used as part of the refinery or natural gas processing plant fuel, or they may be processed further.

  5. The metallic content may be reduced by solvent extraction with propane or similar solvents as the organometallic compounds are precipitated with the asphaltenes and resins (смола).

  6. The residual products from thermal cracking are not treated any further, except for coke, which may be calcined if the specifications require it to be treated.

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