The 1" increment on a ruler is divided into 16 equal parts. If there are 6 shaded parts, what is this shaded portion equal to reduced to lowest terms?
What will be an ideal response?
3/8"
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When the system pressures are lower than the pressure in the refrigerant tank, such as when the system has just been evacuated or if the system is out of refrigerant, refrigerant can be added to both the high and low pressure sides of the system.
Answer the following statement true (T) or false (F)
Computer analysis of a truss. The purpose of this study is to show that the magnitude of the joint displacements as well as the magnitude of the forces in members may control the proportions of structural members. For example, building codes typically specify maximum permitted displacements to ensure that excessive cracking of attached construction, such as exterior walls and windows, does not occur (Photo 1.1 in Section 1.3). A preliminary design of the truss in Figure P4.53 produces the following bar areas: members 1 through 4, 5 in. 2 , and members 5 and 6, 2 in. 2 . Also E = 29,000 kips/in. 2 . Case 1: Determine all bar forces, joint reactions, and joint displacements, assuming pin joints. Use the computer program to plot the deflected shape. Case 2: If the maximum horizontal
displacement of joint 4 is not to exceed 0.25 in., determine the minimum required area of the diagonal truss bars, members 5 and 6. For this case assume that the diagaonal members have the same areas, while all other truss members have cross-sectional area of 5 in. 2 . Round the area to the nearest whole number. Photo 1.1: Wind damage. Shortly after thermopane windows were installed in this high-rise office building, they began failing and falling out, scattering broken glass on passers-by beneath. Before the building could be occupied, the structural frame had to be stiffened and all the original glass panels had to be replaced by thicker, tempered glass—costly procedures that delayed the opening of the building for several years.
Determine the final ratio of the following: Drive gear has 23 teeth; driven gear has 36 teeth.
Fill in the blank(s) with the appropriate word(s).
How often should the refrigeration units cooling system be flushed and replaced?
A. Every year B. Every 2 years C. Every 3 years D. Every 4 years