Technician A says that the diameter of a bolt is the same as the wrench size used to remove or install the fastener. Technician B says that the length is measured from the top of the head of the bolt to the end of the bolt. Which technician is correct?
A) Technician A only
B) Technician B only
C) Both technicians A and B
D) Neither technician A nor B
Ans: D) Neither technician A nor B
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The differences in the temperature of the fluid carried and the surrounding air causes _____ in a pipeline.
a. freezing of the line b. linear expansion c. overheating of the line d. contraction
Small fish that are 2 to 6 inches in length are called ____________________
Fill in the blank(s) with correct word
Which of the following statements is true?
A. The change in internal energy of an ideal gas can be calculated using the equation dU = CPdT, even if the pressure of the gas isn’t constant. B. The change in enthalpy of a supercritical fluid can be calculated using the equation dH = CPdT, even if the pressure of the fluid isn’t constant. C. The expression CP = CV + R was derived for ideal gases, but is frequently applied to liquids and solids as well. D. The properties tabulated in the steam tables are all state properties, but none of them are extensive properties. E. WEC = -PV, so U - WEC is equal to H.
When low-carbon steel with a carbon content of less than 0.30 percent is in freezing temperatures, it must be
preheated to a temperature above _____. a. 40°F (4°C) b. 70°F (21°C) c. 100°F (38°C) d. 500°F (260°C)