Which of these tools is a brand name?
A) Monkey wrench B) Locking pliers C) Side cutters D) Vise Grips
D
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Oil, with a density of 910 kg/m3 and a specific heat of 1.8 kJ/kg-K is in an pump. The pump increases the pressure of the oil from 100 kPa to 5000 kPa, while the oil temperature increases from 40°C to 90°C. Determine the changes in specific internal energy and specific enthalpy of the oil. At what final pressure, would you consider it acceptable to disregard the pressure component of the specific enthalpy change?
Given: p = 910 kg/m3; c = 1.8 kJ/kg-K; P1 = 100 kPa; P2 = 5000 kPa; T1 = 40°C; T2 = 90°C What will be an ideal response?
In multizone systems with one trunk duct to each zone, what is used to adjust the temperature of the air?
A) Mixing dampers B) Fans C) Outside air D) Hot and cold decks
The difference between an SCR and a TRIAC is that:
A) An SCR can switch AC current but an TRIAC can only switch DC current. B) A TRIAC can switch AC current but an SCR can only switch DC current. C) A TRIAC passes three times as much current as an SCR. D) An SCR regulates AC voltage and a TRAIC only works with both DC and AC.
A SIP Proxy is used to:
A) Interrogate the call flow to determine call quality. B) Bill the customer. C) Interpret and step up calls, tear down calls — all signaling functions related to calls. D) None of the above.