When using Type N portland cement-lime mortar, use _____ .
A. 2 parts portland cement, 1 part hydrated lime, and 5 parts sand
B. 1 part portland cement, 1 part hydrated lime, and 6 parts sand
C. 1 part portland cement, 2 parts hydrated lime, and 3 parts sand
D. 2 parts portland cement, 3 parts hydrated lime, and 4 parts sand
Answer: B
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Un refuerzo de losa que se usa para evitar que se hagan fisuras y que proporciona poca resistencia estructural es _____.
a. una barra de refuerzo b. alambre soldado c. pasadores cilíndricos lisos d. pasadores de placa cua- drados
List at least two other factors that shippers should take into consideration when choosing modes to ship products by.
A large manufacturer uses two factors to decide whether to use truck or rail for movement of its products to market: cost and total travel time. The manufacturer uses a utility formula that rates each mode. The formula is U = 6C + 14T, where C is cost ($/ton) and T is time (hrs). For a given shipment of goods, a trucking firm can deliver in 12 hrs and charges $30/ton, whereas a railroad charges $22/ton and can deliver in 16 hrs. What will be an ideal response?
By 1850, the South
A. was experiencing serious economic difficulties. B. feared that slavery might be abolished in states where it already existed. C. remained concerned about its weak voice in national government. D. was relatively well off, politically and economically. E. recognized that slavery's expansion was over.
All of the following statements are true EXCEPT:
A. emission of fuel vapors from the fuel tank can be controlled by sealing the fuel system from the atmosphere. B. on a hot day, gasoline in the tank contracts. C. air must be allowed to enter the fuel tank to take the place of fuel as it is consumed. D. the fuel tank can be vented by the gas cap or by a vent solenoid.