ACI - CONCRETE STRENGTH TESTING
TECHNICIAN (CSTT) QUESTIONS AND
ANSWERS
Standard bPractice bfor bCapping bCylindrical bConcrete bSpecimens b- bcorrect
banswer✔✔ASTM bC617
Procedures bfor bcapping benable bconcrete bcylinders band bcores bto bmeet bC617's
bpractice brequirements bfor___ band___. b
C617 b- bcorrect banswer✔✔perpendicularity, bplaneness b
C617, b3.1
____ b____ bcan bbe bmade bof bglass, bmachined bmetal, bpolished bgranite, bor bdiabase.
b
C617 b- bcorrect banswer✔✔Capping bplates b
C617, b4.1
Sulfur bcaps bcan bbe bformed bagainst b___ bor___ bplates. b
C617 b- bcorrect banswer✔✔metal, bstone b
C617, b4.1
The bworking bsurface bof ba bcapping bplate bshall bnot bdepart bfrom ba bplane bby bmore
bthan b___ binch b( b___ bmm) bin b6 binches b(150 bmm). b
C617 b- bcorrect banswer✔✔0.002 binch b(0.05 bmm) b
C617, b4.1
Device bused bin bconjunction bwith ba bcapping bplate bto bensure bperpendicularity. b
C617 b- bcorrect banswer✔✔Alignment bdevice b
C617, b4.2
Perpendicularity brequirement bof bthe baxis bof ba bcylindrical bspecimen bis b___° b. b
C617 b- bcorrect banswer✔✔0.5° b
, C617, b4.2
The belement bof ba bmelting bpot bthat bensures bagainst baccidents bduring bthe
breheating bof bcooled bsulfur. b
C617 b- bcorrect banswer✔✔Peripheral bHeating b
C617, b4.3.1
Temperature bof bthe bsulfur bmortar bpot b/ bmaterials. b
C617 b- bcorrect banswer✔✔265 b- b290°F b(130 b- b145°C) b
C617, b5.4.2
Capping bmaterial bto bbe bused bon bfreshly bmolded bcylinders. b
C617 b- bcorrect banswer✔✔Neat bPortland bCement bpaste b
C617, b6.1
Remove bthis bfrom bthe bend bof bcylinders bbefore bcapping. b
C617 b- bcorrect banswer✔✔oily bor bwaxy bmaterials b
C617, b6.2.1
Materials bthat bcan bbe bused bto bcap bhardened bcement bconcrete bcylinders bare b___
b, b___ b, b___ b. b
C617 b- bcorrect banswer✔✔Neat bPortland bCement, bGypsum bCement, bSulfur bmortar b
C617, b1.1
Plaster bof bparis bis ban bexample bof ba bhigh-strength bplaster. b(T/F)
C617 b- bcorrect banswer✔✔False b
C617, bNote: b7
Sulfur band bgypsum bcubes bminimum bcompressive bstrength bis b____ bor bthe bcylinder
bstrength, bwhichever bis bgreater. b
C617 b- bcorrect banswer✔✔5000 bpsi b
C617, bTable b1
Strength bof bthe bNeat bCement bPaste bdepends bon b___ b, b___ b, band b___ b. b
C617 b- bcorrect banswer✔✔Water bcement bratio, btime, btype bof bcement b
C617, b5.2.1 b& bNote: b4
These bare bavoided bwhen ba bslight btwisting bmotion bis bapplied bwhile bcapping. b
TECHNICIAN (CSTT) QUESTIONS AND
ANSWERS
Standard bPractice bfor bCapping bCylindrical bConcrete bSpecimens b- bcorrect
banswer✔✔ASTM bC617
Procedures bfor bcapping benable bconcrete bcylinders band bcores bto bmeet bC617's
bpractice brequirements bfor___ band___. b
C617 b- bcorrect banswer✔✔perpendicularity, bplaneness b
C617, b3.1
____ b____ bcan bbe bmade bof bglass, bmachined bmetal, bpolished bgranite, bor bdiabase.
b
C617 b- bcorrect banswer✔✔Capping bplates b
C617, b4.1
Sulfur bcaps bcan bbe bformed bagainst b___ bor___ bplates. b
C617 b- bcorrect banswer✔✔metal, bstone b
C617, b4.1
The bworking bsurface bof ba bcapping bplate bshall bnot bdepart bfrom ba bplane bby bmore
bthan b___ binch b( b___ bmm) bin b6 binches b(150 bmm). b
C617 b- bcorrect banswer✔✔0.002 binch b(0.05 bmm) b
C617, b4.1
Device bused bin bconjunction bwith ba bcapping bplate bto bensure bperpendicularity. b
C617 b- bcorrect banswer✔✔Alignment bdevice b
C617, b4.2
Perpendicularity brequirement bof bthe baxis bof ba bcylindrical bspecimen bis b___° b. b
C617 b- bcorrect banswer✔✔0.5° b
, C617, b4.2
The belement bof ba bmelting bpot bthat bensures bagainst baccidents bduring bthe
breheating bof bcooled bsulfur. b
C617 b- bcorrect banswer✔✔Peripheral bHeating b
C617, b4.3.1
Temperature bof bthe bsulfur bmortar bpot b/ bmaterials. b
C617 b- bcorrect banswer✔✔265 b- b290°F b(130 b- b145°C) b
C617, b5.4.2
Capping bmaterial bto bbe bused bon bfreshly bmolded bcylinders. b
C617 b- bcorrect banswer✔✔Neat bPortland bCement bpaste b
C617, b6.1
Remove bthis bfrom bthe bend bof bcylinders bbefore bcapping. b
C617 b- bcorrect banswer✔✔oily bor bwaxy bmaterials b
C617, b6.2.1
Materials bthat bcan bbe bused bto bcap bhardened bcement bconcrete bcylinders bare b___
b, b___ b, b___ b. b
C617 b- bcorrect banswer✔✔Neat bPortland bCement, bGypsum bCement, bSulfur bmortar b
C617, b1.1
Plaster bof bparis bis ban bexample bof ba bhigh-strength bplaster. b(T/F)
C617 b- bcorrect banswer✔✔False b
C617, bNote: b7
Sulfur band bgypsum bcubes bminimum bcompressive bstrength bis b____ bor bthe bcylinder
bstrength, bwhichever bis bgreater. b
C617 b- bcorrect banswer✔✔5000 bpsi b
C617, bTable b1
Strength bof bthe bNeat bCement bPaste bdepends bon b___ b, b___ b, band b___ b. b
C617 b- bcorrect banswer✔✔Water bcement bratio, btime, btype bof bcement b
C617, b5.2.1 b& bNote: b4
These bare bavoided bwhen ba bslight btwisting bmotion bis bapplied bwhile bcapping. b
