Chapter 1 Flashcards
Planning for Slab on Ground Placement
It is important that the ______ _______ read and understand project specifications.
Finisher Foreman
If the crew can place and finish 100 yd^3 of concrete per hour, the producer’s delivery rate should be about _____yd^3 per hour
100
Concrete is sold by the ton. T or F?
False
Delays in discharging concrete trucks can result in the concrete being hard to: A. pump B. place C. finish D. pump, place and finish
D. pump, place and finish
Inch/Pound:
For a concrete floor slab that is 6in thick, 200ft long and 100ft wide you should order_____yd^3 of concrete, assuming a 10% waste factor.
407cy
When there is room for 2 concrete trucks to discharge into a pump hopper, placement is faster because:
A. both trucks must be discharging at same rate to keep the hopper full.
B. as one truck is finishing, the other is ready to unload concrete.
C. one driver can discharge both trucks at the same time.
D. the pump operator can discharge both tucks so drivers can take a break.
B. as one truck is finishing, the other is ready to unload concrete.
Concrete from a ready mix truck mst usually be completely discharged within _____ hours after water has been added at the plant.
1.5hrs
You can tell when water was added to the concrete truck by looking at the: A. batch ticket B. revolution counter on the truck C. truck number D. time the concrete was ordered
A. batch ticket
When concrete for a slab placement will be discharged from the truck chute, truck arrivals should be spaced at about: A. 5 mins B. 15 mins C. 45 mins D. 90 mins
B. 15 mins
When finishers get behind because the concrete is setting faster than expected and the placing crew is also shorthanded, one solution is slowing the concrete delivery rate to match worker output. T or F?
True
In deciding how much concrete to order for a floor placement, you should calculate the number of cubic yards needed to fill the forms, then order 2 to 3 cubic yards less so you don’t waste concrete that is not needed. T or F?
False
The question, “What finisher or finishers can request addition of water to the concrete truck on site?” should be answered at the ______ ______.
Preconstruction Meeting