Smaller aggregate is incorporated in the concrete mixture, then exposed after tilt-up by using _____.
a. compressed air
b. vibratory grinding
c. rotary wire brushing
d. pressure washing
Answer: D
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Identify the statement that is false.
A. Royal titles were unknown in the American colonies. B. Property ownership and political participation were relatively accessible. C. The Americans were dependent on the British officials in London to run their affairs. D. Republican and Whig ideas predisposed the Americans to be more aware of threats to their rights. E. Distance weakens authority; great distance weakens authority greatly.
The garage is broken into and the technician tools are stolen, this is covered by _______ if the insurance limits are high enough.
A. Business liability insurance (Business operations policy) B. Garage keepers insurance C. Property insurance with commercial auto coverage D. Workers compensation
A 250 V, 500 rpm, dc, separately excited motor is driving a constant-load torque. The motor has a field constant K? = 4 Vs and an armature resistance of 1 ?. Ignore the frictional losses.
a. Calculate the full-load torque. b. Determine the terminal voltage required to block (stop) the motor. c. Determine the terminal voltage needed to rotate the motor at 100 rpm in the reverse direction. d. Calculate the motor speed while the motor is operating at the conditions of part (c), and the polarities of the terminal voltage are reversed. e. Sketch the speed-torque characteristics and show all the operating conditions.
The cation exchange capacities of alkaline soils are generally higher than those of acid soils (Vertisols excepted). Which of the following characteristics of alkaline soils most likely accounts for this high CEC?
A) high exchangeable calcium B) high content of 2:1 type clays C) high exchangeable sodium content D) high humus content E) high content of hydrous oxides of iron and aluminum