Multiple Choice
Identify the
letter of the choice that best completes the statement or answers the question.
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1.
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The
reaction of triglycerides in vegetable oils or animal fats with an alcohol in the presence of acid or
base catalyst to produce biodiesel is called: a. | esterification | c. | neurtalization | b. | transsesterification | d. | saponification | | | | |
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2.
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What
is the primary reason for converting vegetable oils into biodiesel? a. | to reduce its
flash point | c. | to reduce its
viscosity | b. | to increast its energy content | d. | to make it more combustible | | | | |
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3.
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Why
is methanol the preferred alcohol for biodiesel production? a. | low
cost | c. | low boiling
point | b. | easier to recover | d. | all of the above | | | | |
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4.
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Methanol is normally added in excess in producing biodiesel from fat/oil because of
what reason? a. | the reaction is
reversible | c. | to obtain a
higher yield | b. | to avoid the backward reaction | d. | all of the above | | | | |
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5.
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What
is the major side reaction during the base-catalyzed transesterification of fat/oil with
methanol? a. | esterification | c. | saponification | b. | neutralization | d. | distillation | | | | |
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6.
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What
is the co-product of biodiesel production? a. | water | c. | glycerol | b. | triglycerides | d. | soap | | | | |
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7.
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What
is/are the product(s) of incomplete reaction in making biodiesel? a. | triglycerides | c. | monoglycerides | b. | diglycerides | d. | all of the above | | | | |
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8.
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What
is the major vegetable oil feedstock for biodiesel production in the U.S.? a. | soybean | c. | canola | b. | sunflower | d. | safflower | | | | |
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9.
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Which
of the following will lead to lower conversion of vegetable oil into biodiesel? a. | using 5%
methanol based on the weight of oil | c. | minimum mixing towards the end of the
reaction | b. | insufficient washing | d. | all of the above | | | | |
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10.
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Negative attributes of biodiesel include: a. | poor cold flow
performance | c. | poor
lubricity | b. | poor oxidative stability | d. | a and b only | | | | |
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11.
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All
of the following may eventually lead to clogging of filters in an engine except: a. | poor cold flow
properties | c. | unacceptable
amount of water | b. | high amount of methanol | d. | unacceptable amount of free glycerol | | | | |
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12.
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Generally, which of the following is NOT true about the emission of biodiesel compared
to petroleum diesel fuel? a. | lower NOx | c. | essentially no SOx | b. | lower
particulate matter | d. | all of the above
are true | | | | |
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13.
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Which
test included in the ASTM D6751 is a measure of the tendency of a fuel to form
“coke”? a. | water and
sediment | c. | copper strip
corrosion | b. | acid number | d. | carbon residue | | | | |
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14.
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Which
test included int he ASTM D6751 measures the actual amount of unconverted fat/oil in the biodiesel
sample? a. | acid
number | c. | viscosity | b. | total glycerol | d. | free glycerol | | | | |
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15.
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Biodiesel is considered safe to handle compared to diesel fuel, which is attributed to
which fuel property of biodiesel? a. | high flash point | c. | high viscosity | b. | high cloud
point | d. | high pour
point | | | | |
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