If someone is practicing three point contact they will be:
a. using a special type of fastener
b. in contact with a machine with two hands and one foot or two feet and one hand
c. be in contact with a machine with a hand, foot and a safety harness d. be in a machine's seat with a three point seat belt on
B
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In many manufacturing plants, individuals are often working around high-temperature surfaces. Exposed hot surfaces that can cause thermal burns on human skin are considered hazards in the workplace. Metallic surfaces above 70°C can instantly damage skin that touches them. Consider an AISI 1010 carbon steel strip (? = 7832 kg/m3) 2 mm thick and 3 cm wide that is conveyed into a chamber to be cooled at a constant speed of 1?m/s. The steel strip enters the cooling chamber at 597°C. Determine the rate at which heat needs to be removed so that the steel strip exits the chamber at 47°C. Discuss how the conveyance speed can affect the required rate of heat removal.
What role does cost play in determining performance?
What will be an ideal response?
Which of the following is not a bacterial-related disease?
A. Brucellosis B. Cat scratch disease C. Plague D. Tularemia E. Feline panleukopenia
Determine the proper settings for proportional gain and reset time on a two-mode controller using the Ziegler-Nichols Continuous Cycling method, the process identification curve in Figure 12-4a, and Table 12-4b.
Figure 12-4a
Controller Mode
Proportional Gain Kc
Proportional Band PB
Reset Time Ti (Minutes per Repeat)
Reset Rate Tr (Repeats per Minute)
Derivative Time Td
P
0.5 Gu
2 PBu
N/A
N/A
N/A
PI
0.45 Gu
2.2 PBu
Pu/1.2
1.2/Pu
N/A
PID
0.6 Gu
1.7 PBu
0.5 Pu
2/Pu
Pu/8
Table 12-4b
What will be an ideal response?