Discuss the factors to consider in producing a rapid-curing cutback asphaltic material.
What will be an ideal response?
The rate of curing indicates the time that should elapse before a cutback
will attain a consistency thick enough for the binder to perform satisfactorily. The
rate of curing is affected by both inherent and external factors. The important
inherent factors are the volatility of the solvent, the quantity of solvent in the
cutback, and the consistency of the base material. In a rapid-curing material,
gasoline or naphtha is used as the solvent because each evaporates quickly and
therefore the material cures faster than with other solvents. External factors
include temperature, ratio of surface area to volume, and wind velocity across the
exposed surface. The higher any of these factors is, the higher the rate of curing.
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Drive axle gear oil level is being checked. Technician A says that the oil level should be even with the bottom of the filler hole in all drive axles. Technician B says that a label is mounted at the filler hole of axles that require special lubricant. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Your company has been asked to prepare a preliminary cost estimate for a three-story, 22,000 square foot office building. From projects you have constructed during the last year, you have determined that the average cost per square foot to construct an office building is $158.59. Using an inflation rate of 5 percent, prepare an estimate for the office building.
What will be an ideal response?
Refrigerant leaves the metering device:
A) In the same physical state that it entered. B) As a saturated mixture of liquid and vapor. C) As a superheated gas. D) As a subcooled liquid.
When moisture is present in a refrigeration system, it will react with the refrigerant and the oil to form ____.
A. carbon dioxide B. acid C. carbon monoxide D. all of the above