ACI CONCRETE STRENGTH TESTING
TECHNICIAN CP 19 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPLETE STUDY GUIDE
●● Equipment needed for the capping process includes capping _____ ,
_____devices, and ______ pots.
Answer: Plates, alignment, melting
●● Plates for neat cement and high strength gypsum plaster caps should
be made of _____, _____, _____ or _____.
Answer: Glass, metal granite or diabase
●● Sulfur mortar cap plates should be formed against _____ or _____
plates.
Answer: 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?
Answer: True
,●● To avoid accidents during reheating of cooled sulfur, use melting
pots that have _____.
Answer: Peripheral heating
●● The technician should use a stiff layer of _____ to cap fresh concrete
cylinders.
Answer: Neat cement paste
●● Hardened concrete cylinders should be capped with _____, _____ or
_____.
Answer: 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?
Answer: False
●● Sulfur mortars and high-strength gypsum cement cubes must
demonstrate a minimum compressive strength of _____ or ___ __,
whichever is greater.
Answer: 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.
Answer: 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
Answer: 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.
Answer: Excess paste, voids
●● Neat cement paste caps should not be used on dry specimens because
the caps may _____ and _____ when dry.
Answer: Shrink, crack
●● The technician should remove all _____ or _____ materials from the
ends of hardened concrete cylinders before capping
Answer: Oily, waxy
TECHNICIAN CP 19 UPDATED ACTUAL
QUESTIONS AND CORRECT ANSWERS
COMPLETE STUDY GUIDE
●● Equipment needed for the capping process includes capping _____ ,
_____devices, and ______ pots.
Answer: Plates, alignment, melting
●● Plates for neat cement and high strength gypsum plaster caps should
be made of _____, _____, _____ or _____.
Answer: Glass, metal granite or diabase
●● Sulfur mortar cap plates should be formed against _____ or _____
plates.
Answer: 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?
Answer: True
,●● To avoid accidents during reheating of cooled sulfur, use melting
pots that have _____.
Answer: Peripheral heating
●● The technician should use a stiff layer of _____ to cap fresh concrete
cylinders.
Answer: Neat cement paste
●● Hardened concrete cylinders should be capped with _____, _____ or
_____.
Answer: 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?
Answer: False
●● Sulfur mortars and high-strength gypsum cement cubes must
demonstrate a minimum compressive strength of _____ or ___ __,
whichever is greater.
Answer: 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.
Answer: 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
Answer: 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.
Answer: Excess paste, voids
●● Neat cement paste caps should not be used on dry specimens because
the caps may _____ and _____ when dry.
Answer: Shrink, crack
●● The technician should remove all _____ or _____ materials from the
ends of hardened concrete cylinders before capping
Answer: Oily, waxy
