CPSC 110 PSET 10 VIEW AHEAD EXAM QUESTIONS FULL SOLUTION GUIDE
Question:
Equipment needed for the capping process includes capping _____, _____devices, and ______ pots.
Answer:
Plates, alignment, melting
Question:
Plates for neat cement and high strength gypsum plaster caps should be made of _____, _____,
_____ or _____.
Answer:
Glass, metal granite or diabase
Question:
Sulfur mortar cap plates should be formed against _____ or _____ plates.
Answer:
Metal, Stone
Question:
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
,Question:
To avoid accidents during reheating of cooled sulfur, use melting pots that have _____.
Answer:
Peripheral heating
Question:
The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
Answer:
Neat cement paste
Question:
Hardened concrete cylinders should be capped with _____, _____ or _____.
Answer:
High-strength gypsum paste, neat cement paste, or sulfur mortar
Question:
Plaster of paris and mixtures of plaster of paris and portland cement are examples of suitable high
strength plasters. True or False?
Answer:
False
Question:
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
, Question:
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
Question:
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
Question:
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
Question:
Neat cement paste caps should not be used on dry specimens because the caps may _____ and
_____ when dry.
Answer:
Shrink, crack
Question:
The technician should remove all _____ or _____ materials from the ends of hardened concrete
cylinders before capping
Answer:
Question:
Equipment needed for the capping process includes capping _____, _____devices, and ______ pots.
Answer:
Plates, alignment, melting
Question:
Plates for neat cement and high strength gypsum plaster caps should be made of _____, _____,
_____ or _____.
Answer:
Glass, metal granite or diabase
Question:
Sulfur mortar cap plates should be formed against _____ or _____ plates.
Answer:
Metal, Stone
Question:
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
,Question:
To avoid accidents during reheating of cooled sulfur, use melting pots that have _____.
Answer:
Peripheral heating
Question:
The technician should use a stiff layer of _____ to cap fresh concrete cylinders.
Answer:
Neat cement paste
Question:
Hardened concrete cylinders should be capped with _____, _____ or _____.
Answer:
High-strength gypsum paste, neat cement paste, or sulfur mortar
Question:
Plaster of paris and mixtures of plaster of paris and portland cement are examples of suitable high
strength plasters. True or False?
Answer:
False
Question:
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
, Question:
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
Question:
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
Question:
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
Question:
Neat cement paste caps should not be used on dry specimens because the caps may _____ and
_____ when dry.
Answer:
Shrink, crack
Question:
The technician should remove all _____ or _____ materials from the ends of hardened concrete
cylinders before capping
Answer:
