ACI Concrete Strength Technician | 100% Verified Training Exam Questions & Answers (2024) | Updated for 2026

ACI Concrete Strength Technician
Training Exam 100% Verified Questions
and Answers 2024
Standard Practice for Capping Cylindrical Concrete Specimens - CORRECT
ANSWER-ASTM C617

Procedures for capping enable concrete cylinders and cores to meet C617's practice
requirements for___ and___. - CORRECT ANSWER-Perpendicularity, Planeness

___ can be made of glass, machined metal, polished granite, or diabase. (C617) -
CORRECT ANSWER-Capping qplates

Sulfur qcaps qcan qbe qformed qagainst q___ qor___ qplates. q- qCORRECT
qANSWER-Metal, qstone


The qworking qsurface qof qa qcapping qplate qshall qnot qdepart qfrom qplane qby qmore
qthan___
mm. q- qCORRECT qANSWER-0.05

Device qused qin qconjunction qwith qa qcapping qplate qto qensure qperpendicularity. q-
qCORRECT qANSWER-Alignment qdevice


Perpendicularity qrequirement qof qthe qaxis qof qa qcylindrical qspecimen.
q(degrees) q- qCORRECT qANSWER-0.5


The qelement qof qa qmelting qpot qthat qensures qagainst qaccidents qduring qreheating
qof qcooled qsulfur. q- qCORRECT qANSWER-Peripheral qHeating


Temperature qof qthe qsulfur qmortar qpot/materials. q- qCORRECT qANSWER-265-290 qF

Capping qmaterial qto qbe qused qon qfreshly qmolded qcylinders. q- qCORRECT
qANSWER-Neat qPortland qCement qpaste


Remove qthis qfrom qthe qend qof qcylinders qbefore qcapping. q- qCORRECT
qANSWER-Oily qor qWaxy qmaterials


Materials qthat qcan qbe qused qto qcap qhardened qcement qconcrete qcylinders. q-
qCORRECT qANSWER-Neat qPortland qCement, qGypsum qCement, qSulfur


T/F qPlaster qof qparis qis qan qexample qof qa qhigh-strength qplaster q- qCORRECT
qANSWER-False

, Sulfur qand qgypsum qcubes qmuch qshow qthis qcompressive qstrength qor qthe qcylinder
qstrength, qwhichever qis qgreater. q- qCORRECT qANSWER-5000 qpsi


Strength qof qthe qpaste qdepends qon___, q___, qand___. q- qCORRECT
qANSWER-Water qcement qratio, qtime, qtype qof qcement


These qare qavoided qwhen qa qslight qtwisting qmotion qis qapplied qwhile qcapping. q-
qCORRECT qANSWER-Air qvoids qand qexcess qpaste


Sulfur qmaterial qshould qnot qbe qused qmore qthan q___ qtimes. q- qCORRECT
qANSWER-5


T/F qWhen qcapping qconcrete qcylinders qwith qa qcompressive qstrength qof q5000 qpsi
qor qgreater, qit qis qpermitted qto qreuse qcompound qrecovered qfrom qthe qcapping
qoperation qof qold qcaps. q- qCORRECT qANSWER-False


Sulfur qmortar qshould qbe qkept qaway qfrom qthis qwhile qheating. q- qCORRECT
qANSWER-Water


Sulfur qmortar qshould qbe qkept qunder qa q___ qwith qan___ qfor qventing. q-
qCORRECT qANSWER-Hood, qexhaust


Standard qPractice qfor quse qof qunbonded qcaps qin qdetermination qof qcompressive
qstrength qof qhardened qconcrete qcylinders. q- qCORRECT qANSWER-ASTM qC1231


Thickness qof qpads q(C1231) qin qInches q- qCORRECT qANSWER-1/2

Durometer qused qin qC1231 qwith qa qtolerance qof q+/-5. q- qCORRECT qANSWER-Shore
qA


Type qof qpad qwith qclassifications qin qC1231. q- qCORRECT qANSWER-Neoprene

Height qof qthe qretaining qring qused qin qunbonded qcapping. qin qinches q-
qCORRECT qANSWER-1


The qinside qdiameter qof qthe qretaining qring qshall qbe qwithin q___ qof qthe
qdiameter qof qthe qcylinder. q- qCORRECT qANSWER-102-107%


Thickness qof qthe qretaining qring qfor q6 qin qand q4 qin qspecimens qrespectively. q-
qCORRECT qANSWER-12 qmm, q9 qmm


The qbearing qsurfaces qshall qnot qhave qgouges qor qgrooves qgreater qthan qthis
qdepth. q(mm) q- qCORRECT qANSWER-0.25


Cylinders qshould qbe qmade qin qaccordance qwith qone qof qthese qprocedures. q-
qCORRECT qANSWER-C31 qor qC192