Aci Concrete Strength Testing Technician CP-19
23rd Ed Detailed Questions And Expert Answers
These procedures for capping enable concrete cylinders and cores to meet the
standard practices requirements for __________ and __________. - ANS
Planeness , perpendicularity
Equipment needed for the capping process includes capping __________ ,
__________ devices and __________ pots. - ANS Plates , alignment , melting.
Plates for neat cement and high-strength gypsum plaster caps should be made of
__________, __________, __________, or __________. - ANS Glass, metal,
granite, diabase
Sulfur mortar cap plates should be formed against __________ or __________
plates. - ANS Metal, stone
The purpose of the guide bar or bullseye level is to ensure that caps remain
perpendicular to the axis of the cylinder within 0.5 degrees. True or False? - ANS
True
To avoid accidents during reheating of cooled sulfur, use melting pots that have
__________. - ANS Peripheral heating
, The technician should use a stiff layer of __________ to cap fresh concrete
cylinders. - ANS Neat cement paste
Hardened concrete cylinders should be capped with __________, __________, or
__________. - ANS High-strength gypsum paste, neat cement paste, sulfur mortar
Plaster of Paris and mixtures of plaster of Paris and Portland cement are examples
of suitable high-strength plasters. True or False - ANS False
Sulfur mortars and high-strength gypsum cement cubes must demonstrate a
minimum compressive strength of __________ or __________, whichever is
greater. - ANS 35 MPa [5000 psi], cylinder strength
The cement paste should be applied to the freshly molded cylinder from
__________ hours after molding. This is to allow for __________ of the concrete
specimen - ANS 2 to 4, settling
The strength of the paste depends on:
A. The water-cement ratio
B. Time
C. The equipment used
D. Type of cement - ANS A, B, and D
The slight twisting action will help eliminate __________ and air __________ when
the capping plate is placed into the mound of paste. - ANS Excess paste, voids
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