What characteristic limits the load a vacuum lifter is permitted to hoist, compared to standard hoisting devices?
a. Vacuum lifters are more expensive than other types.
b. Vacuum lifters are not physically attached to the load.
c. Vacuum lifters are more complicated than hook blocks.
d. Vacuum lifters are made of weaker materials than other types.
b. Vacuum lifters are not physically attached to the load.
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Fill in the blank(s) with the appropriate word(s).
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a. Discharge valve opens b. Suction valve closes c. Refrigerant leaves the cylinder d. Refrigerant begins to enter the cylinder
Use of a laser cutting beam exposes the operator to secondary radiation
Indicate whether the statement is true or false
An increase in temperature will cause viscosity to _____
A) decrease B) increase C) vary randomly D) remain the same