Locations in which flammable gases or vapors may be present in the air in quantities sufficient to produce explosive or ignitable mixtures are identified as _____.
a. Class I locations
b. Class II locations
c. Class III locations
d. Class IV location
a. Class I locations
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A system or circuit conductor that is intentionally grounded is called a ____.
a. conductive path b. circuit fault c. current path d. grounded conductor
Steam enters a steam turbine at a volumetric flow rate of 110 ft3/s. The enthalpy of the steam is 1320 Btu/lbm, and the specific volume of the steam is 2.43 ft3/lbm. The velocity of the steam as it enters the steam turbine is 250 ft/s, and the height of the entrance above the ground is 10 ft. The acceleration due to gravity is 32.17 ft/s2. Determine the rate at which energy is being transferred via mass flow for the steam.
Given: V?= 110 ft3/s; h = 1320 Btu/lbm; v = 2.43 ft3/lbm; V = 250 ft/s; z = 10 ft; g = 32.17 ft/s2 What will be an ideal response?
Which type of conduit body does not provide a change in direction but may be used as a pulling point in a conduit run that has bends totaling more than 360°?
a. Type LL b. Type LB c. Type SLB d. Type C
Worn or defective bearings in the pump or motor can cause _____
a. noise and vibration b. excess lubrication c. cavitation d. excessive suction pressure