ช่วย จขกท. ทำแบบฝึกหัดทีครับ

คือว่า จขกท. ติด0วิชาภาษาอังกฤษนะครับ ครูเค้าเลยให้ไปสอบแก้ตัวได้สองรอบ
ถ้ารอบแรกไม่ผ่าน ก็สอบรอบสอง แต่ถ้ารอบสองไม่ผ่าน ก็ เรียนซ้ำชั้นอ่ะ
วันนี้ จขกท. ไปสอบรอบแรกมาแล้ว จากคะแนนเต็ม 20 ปรากฏว่าสอบได้ 15คะแนน ครูเค้าบอกว่าต้องถูกทั้งหมดถึงจะผ่าน... จขกท. ทำสุดความสามารถแล้ว ทำไม่ได้จริงๆ ครูเค้าเลยบอกว่าพรุ่งนี้ค่อยมาสอบใหม่ แต่ถ้าไม่ผ่านอีก ก็ต้องซ้ำชั้น (เครียดมากกก) จขกท.เลยอยากให้ เพื่อนๆที่ สยามโซน มาช่วยแนะนำ และ บอกแนวทางในการตอบให้ จขกท.ทีนะครับ

ขอร้องล่ะ

จากบทความ

Plants : The Next Petroleum ?

ENERGY FROM PLANTS

Inventors of early automobiles like Henry Ford and Rudolf Diesel in the late 1800s and early 1900s expected that the engines  of their cars would run on fuels derived from plants, but then cheap petroleum became popular. So the cars that were used by the general public ran on gas.
    Nowadays, with rising oil prices and growing ecological awareness, biofuels are more and more in demand and will be replacing petroleum as a source of power for cars, trucks, and aircraft in the future. Biofuels are made from  plants and vegetable oils and other things that grow in nature. So they are renewable sources of energy.
  Biofuels produce less carbon dioxide than petroleum fuels, and therefore they do not contribute as much to global warming. They also produce fewer toxins, which contribute to respiratory diseases in people in many cities. While nature takes billions of years to make oil ,biofuel in limited only by growth rates of plants and the availability of farmland. Biodiesel and ethanol are two types of biofuels.

BIODIESEL

Biodiesel is a fuel that is made from materials such as vegetable oils, animal fats, and waste matter. In the case of waste matter, a year’s worth of Europe’s used cooking oil could produce more than a billion liters of biodiesel fuel. In order to convert starchy and oily plants like repeseed and soybean fats into biodiesel, they have to be heated. After processing, unlike regular vegetable oil, biodiesel has combustible properties very similar to petroleum diesel, and can replace it in most cases. Biodiesel is a good possibility to replace fossil fuels as the world’s primary energy source for vehicles. There are two reasons for this : biodiesel can be used in current car engines, and it can be transported and sold using existing infrastructures.

ETHANOL

Ethanol, also known as grain alcohol, is produced from starchy grains like corn or from sugarcane. It can be used by itself or added to gasoline. Ethanol cuts down on polluting emissions but it produces less energy per liter than gasoline. However, the cost of the fuel is as little as half the cost of gasoline in countries like Brazil, which is the world’s biggest ethanol producer. In Brazil, the fuel can be found at every service station from downtown Rio de Janeiro to the remote Amazon region.

FOOD OR FUEL?

Although the advantages of renewable nonpolluting fuels are clear, there are many who object to their use as an alternative source of energy. They say that growing plants for fuel production could divert agricultural production away from growing crops for food in a hungry world, and less food could lead to more starvation in poor countries.

และแบบฝึกหัดอีก5ข้อ ที่ทำไม่ถูก

1. On that kind of fuel did Ford and Disel expect the engines of their car to run?
จขกท.ตอบว่า - Petroleum ปรากฏว่า..ผิด

2. What will be replacing petroleum in the near future?
จขกท.ตอบว่า - Biodiesel and Ethanol. ปรากฏว่า..ยังไม่ละเอียดพอ

3. In your own words,explain the following fuels---their composition and their advantages :
a.. biodiesel = Biodiesel is a fuel that is made from materials such as vegetable oils, animal fats. Biodiesel has combustible properties very similar to petroleum diesel, and can replace it in most cases. -ผิด-

b.. ethanol = Ethanol, also known as grain alcohol, is produced from starchy grains like corn or from sugarcane.  Ethanol cuts down on polluting emissions but it produces less energy per liter than gasoline. -ผิด-


4. What do the above fuels have in common compared to petroleum?
จขกท.ตอบว่า - Cars would run. ปรากฏว่า..ผิด

5. What is one problem with the proposed use of biofuels as an alternative source of energy?
จขกท.ตอบว่า - They say that growing plants for fuel production could divert agricultural production away from growing crops for food in a hungry world, and less food could lead to more starvation in poor countries.ปรากฏว่า..ผิด

จขกท.เลยอยากให้ เพื่อนๆที่สยามโซนช่วยหน่อยนะครับ ว่าถ้าเป็นเพื่อนๆ เพื่อนๆจะตอบว่าอะไร....

ขอบคุณล่วงหน้าครับ


.... กระทู้นี้ย้ายมาจากห้องบันเทิงตะวันตก ...