ACI CONCRETE COMPREHENSIVE EXAM
SCRIPT VERIFIED QUESTIONS COMPLETE
ANSWERS GRADED APLUS
◉ How is concrete quantity calculated?
Answer: L x W x H / 27 yd^3
◉ 10% rule
Answer: Move decimal one spot to the left of your calculated
number, then add this number to calculated number
◉ What is a byproduct of cement meeting water?
Answer: Heat of hydration (gets hotter)
◉ Strength of normal concrete is dependent of:
Answer: Water cement ratio
◉ What is the most economical way of pouring concrete?
Answer: Chute directly off a truck
◉ How can delays be avoided when using a boom pump?
, Answer: By allowing enough room to fit 2 trucks, so one truck is
ready while the other is finishing
◉ When to use a bull float?
Answer: When the FF number is below 20
◉ When to use a highway straightedge?
Answer: When the FF number is 20 or above
◉ What are hand floats used for?
Answer: To start the floating process, to produce a plane level finish,
texture finish as well
◉ Wood floats:
Answer: Best for non-air-entrained and high slump concrete
◉ Magnesium float:
Answer: For air-entrained and lightweight concrete
◉ Hand finishing trowel:
Answer: Used in the final stages of finishing, after floating, steel 3-5"
wide & 10-20" long
SCRIPT VERIFIED QUESTIONS COMPLETE
ANSWERS GRADED APLUS
◉ How is concrete quantity calculated?
Answer: L x W x H / 27 yd^3
◉ 10% rule
Answer: Move decimal one spot to the left of your calculated
number, then add this number to calculated number
◉ What is a byproduct of cement meeting water?
Answer: Heat of hydration (gets hotter)
◉ Strength of normal concrete is dependent of:
Answer: Water cement ratio
◉ What is the most economical way of pouring concrete?
Answer: Chute directly off a truck
◉ How can delays be avoided when using a boom pump?
, Answer: By allowing enough room to fit 2 trucks, so one truck is
ready while the other is finishing
◉ When to use a bull float?
Answer: When the FF number is below 20
◉ When to use a highway straightedge?
Answer: When the FF number is 20 or above
◉ What are hand floats used for?
Answer: To start the floating process, to produce a plane level finish,
texture finish as well
◉ Wood floats:
Answer: Best for non-air-entrained and high slump concrete
◉ Magnesium float:
Answer: For air-entrained and lightweight concrete
◉ Hand finishing trowel:
Answer: Used in the final stages of finishing, after floating, steel 3-5"
wide & 10-20" long
