Most heavy-duty plasma arc cutting systems require one gas cylinder containing the cutting gas and another
containing _____.
a. shielding or cooling gas
b. water vapor
c. acetylene
d. a mixture of cutting gas and shielding gas
a
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How are most superchargers lubricated?
A) By an internal oil reservoir B) By greased bearings C) By engine oil under pressure through lines from the engine D) No lubrication is needed because the incoming air cools the supercharger
Decoders are normally used whenever:
A) inputs are totally random and the active outputs are nonsequential. B) an output or group of outputs is to be activated only when a specific combination of inputs occur. C) outputs are to be activated that are identical to the multiple inputs. D) outputs are to be activated on a random time-share basis independent of the input combinations.
Determine the pressure of the system and the equilibrium constant for the reaction.
A reaction A+B?C+D occurs in the liquid phase at 298.15 K. A vapor phase is also present, but no reaction occurs in the vapor phase. The liquid is an ideal solution and the vapor is an ideal gas. Vapor pressures are 0.12 MPa for compound A, 80kPa for compound B, 0.15 MPa for compound C and 70kPa for compound D. At equilibrium the liquid phase consists of 36 mol% A, 33 mol% B, 11 mol% C and 20 mol% D.
Bison begin breeding at about what age?
A. 2 years B. 18 months C. 1 year D. 9 months