A high strength bolt is identified by ________
A) Lines on the head B) A UNC symbol
C) Strength letter codes D) The coarse threads
A
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Which of the following statements is LEAST-Likely true?
A. Friction occurs between the piston rings and cylinder walls. B. Low-tension piston rings were introduced in the mid-1980s to improve fuel economy. C. Compression rings account for about 60% of the total drag on a cylinder wall, and the oil ring accounts for 20%. D. Cast iron rings are used in re-ring jobs when the cylinder walls have not been re-bored.
A chain line ____.
A. must have its length and location dimensioned B. is used when it is more realistic to apply a datum feature symbol to a portion of a surface rather than the entire surface C. is used when a long part has a related feature located in one or more concentrated places D. all of the above E. none of the above
What are five types of greenhouse environmental control that have been used from the origin of greenhouses to the present for controlling the environment in greenhouses?
What will be an ideal response?
What is the secondary voltage in Figure 14-1 if the turns ratio is 9:1?
A) 26.6 V B) 53.2 V C) 13.3 V D) 106 V