A lockout tag should be able to withstand ___________________ of force at a right angle without breaking.
A. 5
B. 25
C. 50
D. 75
Answer: C
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The light striking a pane of glass is refracted as shown in Figure 4.20. The law of refraction states that na sin ?a = nb sin ?b, where na and nb are the refractive indexes of the materi-als through which the light is passing and the angles are from a line that is normal to the surface. The refractive index of air is 1.00. What is the refractive index of the glass?
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Which of the following types of piping is usually connected by threaded fittings?
a. PVC b. Copper tubing c. Stainless steel d. Carbon steel
Which soil sample, the field soil or the forest soil, held more water?
What will be an ideal response?
Mixing valves used to control the final temperature of radiant loops
A) by mixing the hot boiler water with cooler return water B) by bleeding off some of the hot water before it enters the loop C) by mixing the hot water from the boiler with the cold water from the chiller D) by mixing the hot boiler water with fresh makeup water