Questions of the TOEFL iBT Reading Comprehension Practice Test 007

 

Question 1. What is one of the main advantages of LEDs over traditional light sources?
A) They emit light in a variety of colors
B) They produce more heat than light
C) They have a shorter lifespan
D) They are less efficient

Question 2. According to the paragraph, which of the following is NOT true about LEDs?
A) They have a long lifespan
B) They are solid-state devices
C) They emit heat when an electric current is passed through them
D) They are highly durable

Question 3. The author mentions all of the following EXCEPT
A) The average lifespan of an LED is around 50,000 hours
B) LEDs are used in various applications such as lighting for homes and offices
C) The use of LEDs will continue to grow as technology advances
D) LEDs are not a good choice for reducing energy consumption

Question 4. Which of the following can be inferred from the paragraph about LED lights?
A) LED lights are not as efficient as traditional light sources.
B) LED lights are less versatile in terms of applications than traditional light sources.
C) LED lights are more energy-efficient than traditional light sources.
D) LED lights are not durable and have a short lifespan.

Question 5. The author of the paragraph implies that LED lights have what advantage over traditional light sources?
A) LED lights are less durable and have a short lifespan.
B) LED lights are less versatile in terms of applications than traditional light sources.
C) LED lights are more energy-efficient than traditional light sources.
D) LED lights are not as efficient as traditional light sources.

Question 6. Why does the author mention the process of electroluminescence in the passage?
A) To explain the disadvantages of LED lights
B) To provide background information on LED lights
C) To show the difference between LED lights and traditional light sources
D) To emphasize the high efficiency of LED lights

Question 7. Why does the author include the information about the average lifespan of an LED light in the passage?
A) To show the versatility of LED lights
B) To provide background information on LED lights
C) To emphasize the durability of LED lights
D) To compare LED lights to traditional light sources

Question 8. The word "electroluminescence" in the passage is closest in meaning to...
A) Electro-resistance
B) Electro-reflection
C) Electro-illumination
D) Electro-dissipation

Question 9. The word "semiconductor" in the passage is closest in meaning to:
A) A conductor
B) An insulator
C) A material with intermediate conductivity
D) A type of light

Question 10. Correct
A semiconductor is a material with electrical conductivity that is intermediate between that of a conductor and an insulator. It is used in devices such as LEDs to control the flow of electrical current and generate light.
Which of the sentences below best expresses the essential information in the following sentence? "LED lights are able to convert more of the electrical energy they receive into light energy, while traditional light sources such as incandescent bulbs and fluorescent tubes tend to produce more heat than light."
A) LED lights transform electrical energy into light, while traditional light sources emit more heat than light.
B) LED lights are efficient at converting electrical energy into light energy, while traditional light sources produce heat instead of light.
C) LED lights have the ability to turn electrical energy into light, while traditional light sources generate more heat and less light.
D) LED lights change electrical energy into light energy efficiently, while traditional light sources produce heat instead of light energy.