Coal is a product of the remains of ancient ____.
a. marine organisms
b. arthropods buried in swamps
c. plants buried in swamps
d. plants buried in marine sediments
Question 2Steam turbine engines were an important development in the late 1800s because ____.
a. they operated with a low pressure system that was safer than what was used before
b. their spinning action was almost soundless
c. they allowed boats to travel at speeds over 100 knots
d. they became the main source of electricity production in the U.S.
Question 3Which type of coal below is described accurately?
a. Anthracite less dense and very brittle
b. Bituminous black, shiny and dense
c. Lignite a dull black low-density coal
d. Anthracite black, shiny and dense
Question 4The process by which coke and coal gas are made from coal is called distillation.
Indicate whether the statement is true or false.
Question 5The pyrolysis of coal involves heating coal in the absence of oxygen.
Indicate whether the statement is true or false.
Question 6Coal gas was used in many towns in Europe and the U.S. in the nineteenth century but its use declined
because of the toxicity of one of its elements, carbon dioxide.
Indicate whether the statement is true or false.
Quick Reply
