A 2:1 clay is more active in soil than sand because clay has _____.
a. negative charge
b. less surface area
c. less isomorphous charge
d. all of the above
Ans: a. negative charge
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What is the first step when servicing a vehicle refrigeration (A/C) system?
A) Vacuum the system B) Mode door check C) Refrigerant identification D) Weigh the refrigerant charge
Los clavos de soldadura suelen instalarse en centros de _______.
a. 6 pulgadas (15,24 cm) b. 12 pulgadas (30,48 cm) c. 18 pulgadas (45,72 cm) d. 24 pulgadas (60,96 cm)
A spherical copper float with a diameter of 1.40 inches weighs 0.78 ounce. Another spherical float made of the same material is twice the diameter, or 2.80 inches. What is the weight of the 2.80-inch diameter float? Round the answer to 3 significant digits.
Fill in the blank(s) with the appropriate word(s).
Technician A says that gear reduction requires a smaller drive gear than driven gear. Technician B says that overdrive requires a smaller drive gear than driven gear. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician