ACI CONCRETE STRENGTH TESTING
TECHNICIAN FINAL PAPER 2026 FULL
SOLUTION QUESTIONS AND ANSWERS 100%
CORRECT
◉ Sulfur mortars and high strength gypsum cement cubes must
demonstrate a minimum compressive strength of
_______________________ or _______________________, whichever is greater.
Answer: 5000 psi (35MPa); cylinder strength
(1.3.4)
◉ _______________________ the pot and recharge with fresh material at
intervals to ensure that the oldest material in the pot has not been
used for more than _______________________ times.
Answer: Empty; 5
(1.3.4)
◉ The cement paste should be applied to the freshly molded
cylinder from _______________________ hours after molding. This is to
allow the _______________________ of the concrete specimen.
,a. 2-4 hours; separation
b. 2-4 hours; settling
c. 2-5 hours; separation
d. 2-5 hours; settling
Answer: b. 2-4 hours; settling
(1.4.2)
◉ The strength of neat cement paste depends on
_______________________, _______________________, and _______________________.
Answer: water-cement ratio, curing time/age of cap, and type of
cement.
(1.3.4)
◉ A slight twisting action will help eliminate _______________________
and _______________________ when the capping plate is placed onto the
mound of neat cement paste.
Answer: excess paste; air pockets (voids)
(1.4.2)
◉ True or false?
, When capping concrete cylinders with a compressive strength of 35
MPa (5000 psi) or greater, it is permitted to reuse compounded
recovered from the capping operation or old caps.
Answer: False
***Sulfur can ONLY be reused if the cylinders previously tested had
strength LESS than 5,000 psi (35 MPa)***
(1.3.4)
◉ Neat cement paste caps should not be used on dry specimens
because the caps may _______________________ and _______________________
when dry.
a. shrink and crack
b. bulge and crack
c. shrink and break
d. bulge and break
Answer: a. shrink and crack
(1.3.4)
TECHNICIAN FINAL PAPER 2026 FULL
SOLUTION QUESTIONS AND ANSWERS 100%
CORRECT
◉ Sulfur mortars and high strength gypsum cement cubes must
demonstrate a minimum compressive strength of
_______________________ or _______________________, whichever is greater.
Answer: 5000 psi (35MPa); cylinder strength
(1.3.4)
◉ _______________________ the pot and recharge with fresh material at
intervals to ensure that the oldest material in the pot has not been
used for more than _______________________ times.
Answer: Empty; 5
(1.3.4)
◉ The cement paste should be applied to the freshly molded
cylinder from _______________________ hours after molding. This is to
allow the _______________________ of the concrete specimen.
,a. 2-4 hours; separation
b. 2-4 hours; settling
c. 2-5 hours; separation
d. 2-5 hours; settling
Answer: b. 2-4 hours; settling
(1.4.2)
◉ The strength of neat cement paste depends on
_______________________, _______________________, and _______________________.
Answer: water-cement ratio, curing time/age of cap, and type of
cement.
(1.3.4)
◉ A slight twisting action will help eliminate _______________________
and _______________________ when the capping plate is placed onto the
mound of neat cement paste.
Answer: excess paste; air pockets (voids)
(1.4.2)
◉ True or false?
, When capping concrete cylinders with a compressive strength of 35
MPa (5000 psi) or greater, it is permitted to reuse compounded
recovered from the capping operation or old caps.
Answer: False
***Sulfur can ONLY be reused if the cylinders previously tested had
strength LESS than 5,000 psi (35 MPa)***
(1.3.4)
◉ Neat cement paste caps should not be used on dry specimens
because the caps may _______________________ and _______________________
when dry.
a. shrink and crack
b. bulge and crack
c. shrink and break
d. bulge and break
Answer: a. shrink and crack
(1.3.4)
