These procedures for capping enable concrete cylinders and cores to meet the
standard's 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 or diabase
Sulfur mortar cap plates should be formed against _____ or _____ plates. - ANS
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? - 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, 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? - ANS False
Sulfur mortars and high-strength gypsum cement cubes must demonstrate a
minimum compressive strength of _____ or ___ __, whichever is greater. - ANS
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. -
ANS 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 - ANS 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. - ANS Excess paste, voids
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