Principles of Construction Management

A: Governing principle: cycle time multiplied by availability bounds production. Applied here: 75 minutes per lift gives about 8 lifts in a 10‑hour shift; apply 15% weather loss and inefficiency and you're near 6–7 lifts, but site constraints usually cut that to one effective girder per day for heavy bridge elements. Distractor B traps engineers who do clean math but forget real site friction like access and crew changeover.

A: Governing principle: field performance follows the system curve, not the brochure. Applied here: confirming real head conditions tells you whether the pump is operating off its design point due to piping, valves, or elevation differences introduced during construction. Distractor D catches people who jump to hardware changes before proving the boundary conditions.

A: Governing principle: short-duration actions can control demand. Applied here: moving plant and pour sequences introduce impact and vibration that raise internal forces beyond static assumptions. Distractor D appeals to those who recall higher factors but misplace where they apply.

A: Governing principle: groundwater control changes stress in the soil mass. Applied here: higher pumping can induce consolidation and settlement beyond the excavation, so the response is controlled drawdown and instrumentation, not blind capacity increases. Distractor B tempts teams focused only on local excavation conditions.