ACI AGGREGATE TESTING TECHNICIAN - LEVEL 1 -
SECTION 7
For most purposes, this test method measures the moisture in a test sample more
reliably than the test sample ______ . - Answers :Can be made to represent the
aggregate supply
A ventilated controlled-temperature oven should be used for the test when the
aggregate is _____ by heat or when a more _____ measurement is required. - Answers
:Altered, refined· (or their equivalents)
It takes longer for moisture to travel from the interior of a large particle of coarse
aggregate to its exterior surface than from the interior of a small particle to its surface.
True or False? - Answers :True
Quick-drying methods provide accurate results when used on large particles. True or
False or Unknown? - Answers :Unknown; the user should determine by trial If rapid
drying methods provide sufficient accuracy for their intended use
The samples may be dried on a hot plate, with an electric ____ , in a ventilated ____ ,
or in a ventilated _____ . - Answers :Heat lamp, oven, microwave oven
Which of the following are requirements for an acceptable container:
a) It should always be metallic
b) It should be large enough to eliminate spilling
c) It should be unaffected by heat
d) It should be twice as deep as the sample - Answers :b) and c)
An ordinary frying pan should never be used with a hot plate because of heat transfer
problems. True or False? - Answers :False; there are no heat transfer problems
The mass of the test sample should be determined before and after the test to the
nearest ______ . - Answers :0.1%
______ may cause particles to explode. - Answers :Very rapid heating
To speed up the drying time and to avoid overheating in certain areas, ____ the sample
when using a hot plate or heat lamp. - Answers :Stir
The presence of particular ____ in aggregates may cause ____ and ____ in microwave
ovens. - Answers :Minerals, overheating, explosions
When further heating causes, or would cause, less than 0.1 % added ____ , the sample
may be considered thoroughly ______ . - Answers :loss in mass, dry
SECTION 7
For most purposes, this test method measures the moisture in a test sample more
reliably than the test sample ______ . - Answers :Can be made to represent the
aggregate supply
A ventilated controlled-temperature oven should be used for the test when the
aggregate is _____ by heat or when a more _____ measurement is required. - Answers
:Altered, refined· (or their equivalents)
It takes longer for moisture to travel from the interior of a large particle of coarse
aggregate to its exterior surface than from the interior of a small particle to its surface.
True or False? - Answers :True
Quick-drying methods provide accurate results when used on large particles. True or
False or Unknown? - Answers :Unknown; the user should determine by trial If rapid
drying methods provide sufficient accuracy for their intended use
The samples may be dried on a hot plate, with an electric ____ , in a ventilated ____ ,
or in a ventilated _____ . - Answers :Heat lamp, oven, microwave oven
Which of the following are requirements for an acceptable container:
a) It should always be metallic
b) It should be large enough to eliminate spilling
c) It should be unaffected by heat
d) It should be twice as deep as the sample - Answers :b) and c)
An ordinary frying pan should never be used with a hot plate because of heat transfer
problems. True or False? - Answers :False; there are no heat transfer problems
The mass of the test sample should be determined before and after the test to the
nearest ______ . - Answers :0.1%
______ may cause particles to explode. - Answers :Very rapid heating
To speed up the drying time and to avoid overheating in certain areas, ____ the sample
when using a hot plate or heat lamp. - Answers :Stir
The presence of particular ____ in aggregates may cause ____ and ____ in microwave
ovens. - Answers :Minerals, overheating, explosions
When further heating causes, or would cause, less than 0.1 % added ____ , the sample
may be considered thoroughly ______ . - Answers :loss in mass, dry
