Which of the following is a typical step in the shutdown procedure for a pump?
A. Drain the pump.
B. Cool down the equipment.
C. Prepare the pump for maintenance.
D. Ensure the flow rate is as expected.
A. Incorrect. A typical step in the shutdown procedure for a pump is to prepare the pump for maintenance.
B. Incorrect. A typical step in the shutdown procedure for a pump is to prepare the pump for maintenance.
C. Correct. A typical step in the shutdown procedure for a pump is to prepare the pump for maintenance.
D. Incorrect. A typical step in the shutdown procedure for a pump is to prepare the pump for maintenance.
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An insulated air compressor receives 0.25 kg/s of air at 100 kPa and 20°C. The air is compressed to 900 kPa. For exit temperatures ranging from 290°C to 400°C, use your compressor model to plot the power required by the compressor. (The higher the exit temperature, the less efficient the compressor is.)
Given: P1 = 100 kPa; T1 = 20°C; m?= 0.25 kg/s; P2 = 900 kPa; Air (Take State 1 as the inlet, State 2 as the outlet.) Assume: Q?=0 (insulated). For a compressor, assume steady-state, steady-flow, single-inlet, single-outlet flow, with ?KE = ?PE = 0 What will be an ideal response?
Tecumseh argued that Indians should
A. never cede any Indian land to whites under any conditions or per any agreement with whites. B. move west of the Mississippi River. C. not cede control of land to whites unless all Indians agreed. D. exchange traditional buckskin clothing for cloth garments. E. fight as individual tribes and not as a confederacy.
Most contractors use a standard format of summary to capture all the main components of an estimate.
Answer the following statement true (T) or false (F)
Stud spacings of 16? on center or 24? on center are used when framing walls because _____
a. they save money when purchasing materials b. they divide evenly into 48? c. they have always been used by carpenters d. they are multiples of 8?