Use a(n) _____ to measure bearing clearance when installing a spherical roller bearing
a. inside micrometer
b. vernier caliper
c. feeler gauge
d. dial bore gauge
c
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Which of the following are common practice for services installed in vertical chases? Select all that apply.
A) Installing valves on piping runouts from chase to floors. B) Installing fire dampers in ducts runout. C) Providing access platforms for routine maintenance. D) Using chase walls as supply ducts.
Alarm verification is commonly used in _____.
a. homes b. hospitals c. small warehouses d. auxiliary buildings
In 1865, following the conclusion of the Civil War,
A. Southern whites quickly admitted they had been wrong in trying to secede and win Southern independence. B. Southern whites rapidly turned their slaves into fairly paid, free labor employees. C. Southern blacks uniformly turned in anger and revenge against their former masters. D. Southern blacks often began traveling to test their freedom, search for family members, and seek economic opportunity. E. Southern blacks looked to the federal government for help.
In the article “Measurements of the Thermal Conductivity and Thermal Diffusivity of Polymer Melts with the Short-Hot-Wire Method”, the thermal diffusivity of a liquid measured by the transient short-hot-wire method is given by
where? is the thermal diffusivity; V and I are the voltage and current applied to the hot wire, respectively; l is the length of the wire; and A and a are quantities involving temperature whose values are estimated separately. In this article, the relative uncertainties of these quantities are given as follows: V, 0.01%; I, 0.01%; l, 1%; A, 0.1%; a, 1%.
a. Find the relative uncertainty in ?.
b. Which would reduce the relative uncertainty more: reducing the relative uncertainty in l to 0.5% or reducing the relative uncertainties in V, I, and A each to 0?