An example of an ion that would not be attracted to clay colloids is
a. nitrate
b. ammonium
c. sodium
d. phosphate
Ans: a. nitrate
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Mortars have low ____.
A. workability B. bond strength C. volume change D. hardening rates
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What is point source pollution? Give some examples
What will be an ideal response?
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On most vehicles, the anti-rattle spring (strut spring) should be installed on the parking brake strut toward the ________ of the vehicle
A) Front B) Rear
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The process of varying the duty cycle of a rectangular waveform without affecting the total cycle time is called
A) pulse-width modulation B) integration C) summation D) phase modulation
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