Top Mark Questions and Correct Verified Answers
ACI Concrete Strength Testing
Technician CP-19 (14) Questions and
Correct Verified Answers
These procedures for capping enable concrete cylinders and cores to meet the
standard's requirements for ________ and _________.
✓ Planeness, perpendicularity
Equipment needed for the capping process includes capping _____ , _____devices, and
______ pots.
✓ Plates, alignment, melting
Plates for neat cement and high strength gypsum plaster caps should be made of
_____, _____, _____ or _____.
✓ Glass, metal granite or diabase
Sulfur mortar cap plates should be formed against _____ or _____ plates.
✓ Metal, Stone
The purpose of the guide bar or bull's eye level is to ensure that caps remain
perpendicular to the axis of the cylinder within 0.5 degrees. True or False?
Top Mark !!!
, Top Mark Questions and Correct Verified Answers
✓ True
To avoid accidents during reheating of cooled sulfur, use melting pots that have _____.
✓ Peripheral heating
The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
✓ Neat cement paste
Hardened concrete cylinders should be capped with _____, _____ or _____.
✓ High-strength gypsum paste, neat cement paste, or sulfur mortar
Plaster of paris and mixtures of plaster of paris and portland cement are examples of
suitable high strength plasters. True or False?
✓ False
Sulfur mortars and high-strength gypsum cement cubes must demonstrate a minimum
compressive strength of _____ or ___ __, whichever is greater.
✓ 35MPa (5000 psi), the cylinder strength
The cement paste should be applied to the freshly molded cylinder from _____ to _____
hours after molding. This is to allow for _____ of the concrete specimen.
Top Mark !!!
, Top Mark Questions and Correct Verified Answers
✓ 2,4, settling
The strength of the paste depends on:
a) the water-cement ratio
b) time
c) the equipment used
d) type of cement
✓ a, b and d
A slight twisting action will help eliminate _____ and air _____ when the capping plate is
placed onto the mound of the paste.
✓ Excess paste, voids
Neat cement paste caps should not be used on dry specimens because the caps may
_____ and _____ when dry.
✓ Shrink, crack
The technician should remove all _____ or _____ materials from the ends of hardened
concrete cylinders before capping
✓ Oily, waxy
Top Mark !!!
ACI Concrete Strength Testing
Technician CP-19 (14) Questions and
Correct Verified Answers
These procedures for capping enable concrete cylinders and cores to meet the
standard's requirements for ________ and _________.
✓ Planeness, perpendicularity
Equipment needed for the capping process includes capping _____ , _____devices, and
______ pots.
✓ Plates, alignment, melting
Plates for neat cement and high strength gypsum plaster caps should be made of
_____, _____, _____ or _____.
✓ Glass, metal granite or diabase
Sulfur mortar cap plates should be formed against _____ or _____ plates.
✓ Metal, Stone
The purpose of the guide bar or bull's eye level is to ensure that caps remain
perpendicular to the axis of the cylinder within 0.5 degrees. True or False?
Top Mark !!!
, Top Mark Questions and Correct Verified Answers
✓ True
To avoid accidents during reheating of cooled sulfur, use melting pots that have _____.
✓ Peripheral heating
The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
✓ Neat cement paste
Hardened concrete cylinders should be capped with _____, _____ or _____.
✓ High-strength gypsum paste, neat cement paste, or sulfur mortar
Plaster of paris and mixtures of plaster of paris and portland cement are examples of
suitable high strength plasters. True or False?
✓ False
Sulfur mortars and high-strength gypsum cement cubes must demonstrate a minimum
compressive strength of _____ or ___ __, whichever is greater.
✓ 35MPa (5000 psi), the cylinder strength
The cement paste should be applied to the freshly molded cylinder from _____ to _____
hours after molding. This is to allow for _____ of the concrete specimen.
Top Mark !!!
, Top Mark Questions and Correct Verified Answers
✓ 2,4, settling
The strength of the paste depends on:
a) the water-cement ratio
b) time
c) the equipment used
d) type of cement
✓ a, b and d
A slight twisting action will help eliminate _____ and air _____ when the capping plate is
placed onto the mound of the paste.
✓ Excess paste, voids
Neat cement paste caps should not be used on dry specimens because the caps may
_____ and _____ when dry.
✓ Shrink, crack
The technician should remove all _____ or _____ materials from the ends of hardened
concrete cylinders before capping
✓ Oily, waxy
Top Mark !!!
