Explain where air-entrained concrete is required.
What will be an ideal response?
Air-entrainment in concrete increases its durability to freeze-thaw. Hence, air-entrained concrete is required where concrete is exposed to frequent freeze -thaw action, such as in exposed concrete in buildings in cold climates. Its use is common in bridges.
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A remotely located air sampling station can be powered by solar cells or by running an electric line to the site and using conventional power. Solar cells will cost $12,600 to install and will have a useful life of 4 years with no salvage value. Annual costs for inspection, cleaning, etc. are expected to be $1400. A new power line will cost $11,000 to install, with power costs expected to be $800 per year. Since the air sampling project will end in 4 years, the salvage value of the line is considered to be zero. At an interest rate of 10% per year, which alternative should be selected on the basis of a future worth analysis?
What will be an ideal response?
Vehicle hoists are rated by _______
A) Maximum lifting capacity B) The maximum height a vehicle can be lifted C) Both A and B D) Neither A nor B
AISI prefixes include:
A) D B) E C) C D) All of the above
How would a technician do a two-sided SMC plastic repair?
What will be an ideal response?