ASTM ACI Concrete Strength Testing Lab Technician
ASTM ACI CONCRETE STRENGTH LAB TECHNICIAN EXAM 2025 | AL
Study online at https://quizlet.com/_3raj1x
1. C617
QUESTIONS ASTM Standard
AND CORRECT dealing with proper
ANSWERS capping methods
| VERIFIED ANSWERS |
2. Planeness and Per- The procedure for capping enables concrete cylinders to meet the standard's
LATEST VERSION |
pendicularity requirements for ____ and ____
3. plates, alignment, equipment needed for the capping process include ____, ____ devices, and
melting ____ pots
4. glass, metal, gran- Plates for neat cement and high-strength gypsum plaster caps should be
ite, diabase made of ____, ____, ____, or ____
5. metal or stone Sulfur mortar cap plates should be formed against _____ or _____
6. .5 The purpose of the guide bar or bullseye level is that caps remain perpendic-
ular to the axis of the cylinder within _____ degrees
7. peripheral heating to avoid accidents during reheating, use melting pots that have _____ _____
8. Neat Cement Paste The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
9. high strength gyp- Hardened concrete cylinders should be capped with _____ _____ _____
sum paste, neat ce- _____, _____ _____ _____, or _____ _____.
ment paste or sulfur
mortar
10. False- They are not Plaster of Paris and Portland Cement are examples of suitable high-strength
suitable plasters. True or False?
11. 5000 psi or 35 Sulfur mortars and high strength gypsum cement cubes must demonstrate a
MPa or the cylin- minimum compressive strength of _____ or _____; whichever is greater.
der's strength
12. 2 to 4, setting
, ASTM ACI Concrete Strength Testing Lab Technician
Study online at https://quizlet.com/_3raj1x
The cement paste should be applied to the freshly molded cylinders from
_____ to ______ hours after molding. This is to allow ______ of the concrete
specimen.
13. a, b, d The strength of the cement paste depends on: Choose all that apply:
a) water-cement ratio
b) time
c) equipment used
d) type of cement
14. excess paste, voids A slight twisting motion will help eliminate _____ and air _____ when the
capping plate is placed onto the mound of paste.
15. shrink, crack Neat cement paste caps should not be used on dry specimens because the
caps may _____ and _____ when dry.
16. oily, waxing The technician should remove all _____ or _____ materials from the ends of
hardened concrete cylinders before capping
17. Empty, 5 _____ the pot and recharge with fresh material at intervals to ensure that the
oldest material in the pot has not been used more than _____ times.
18. False When capping concrete cylinders with a compressive strength of 5000 psi
(35 MPa) or greater it is permitted to reuse compound recovered from the
capping operation of old caps. True or false?
19. foaming, water To avoid _____, the sulfur mortar should be dry when it is added to the pot.
It should be kept away from _____ when heating.
20. hood and exhaust The melting pot for the sulfur mortar must have a _____ and _____ for _____
for venting
21. deadly. nausea,
stomach distress,
ASTM ACI CONCRETE STRENGTH LAB TECHNICIAN EXAM 2025 | AL
Study online at https://quizlet.com/_3raj1x
1. C617
QUESTIONS ASTM Standard
AND CORRECT dealing with proper
ANSWERS capping methods
| VERIFIED ANSWERS |
2. Planeness and Per- The procedure for capping enables concrete cylinders to meet the standard's
LATEST VERSION |
pendicularity requirements for ____ and ____
3. plates, alignment, equipment needed for the capping process include ____, ____ devices, and
melting ____ pots
4. glass, metal, gran- Plates for neat cement and high-strength gypsum plaster caps should be
ite, diabase made of ____, ____, ____, or ____
5. metal or stone Sulfur mortar cap plates should be formed against _____ or _____
6. .5 The purpose of the guide bar or bullseye level is that caps remain perpendic-
ular to the axis of the cylinder within _____ degrees
7. peripheral heating to avoid accidents during reheating, use melting pots that have _____ _____
8. Neat Cement Paste The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
9. high strength gyp- Hardened concrete cylinders should be capped with _____ _____ _____
sum paste, neat ce- _____, _____ _____ _____, or _____ _____.
ment paste or sulfur
mortar
10. False- They are not Plaster of Paris and Portland Cement are examples of suitable high-strength
suitable plasters. True or False?
11. 5000 psi or 35 Sulfur mortars and high strength gypsum cement cubes must demonstrate a
MPa or the cylin- minimum compressive strength of _____ or _____; whichever is greater.
der's strength
12. 2 to 4, setting
, ASTM ACI Concrete Strength Testing Lab Technician
Study online at https://quizlet.com/_3raj1x
The cement paste should be applied to the freshly molded cylinders from
_____ to ______ hours after molding. This is to allow ______ of the concrete
specimen.
13. a, b, d The strength of the cement paste depends on: Choose all that apply:
a) water-cement ratio
b) time
c) equipment used
d) type of cement
14. excess paste, voids A slight twisting motion will help eliminate _____ and air _____ when the
capping plate is placed onto the mound of paste.
15. shrink, crack Neat cement paste caps should not be used on dry specimens because the
caps may _____ and _____ when dry.
16. oily, waxing The technician should remove all _____ or _____ materials from the ends of
hardened concrete cylinders before capping
17. Empty, 5 _____ the pot and recharge with fresh material at intervals to ensure that the
oldest material in the pot has not been used more than _____ times.
18. False When capping concrete cylinders with a compressive strength of 5000 psi
(35 MPa) or greater it is permitted to reuse compound recovered from the
capping operation of old caps. True or false?
19. foaming, water To avoid _____, the sulfur mortar should be dry when it is added to the pot.
It should be kept away from _____ when heating.
20. hood and exhaust The melting pot for the sulfur mortar must have a _____ and _____ for _____
for venting
21. deadly. nausea,
stomach distress,
