Question 1

Which of the following statements is true about sand?

Accepted Answer

A)  Manufactured sand is smoother than natural sand. 
B)  Natural sand has a sharp, angular grain shape. 
C)  Natural sand is rounder than manufactured sand. 
D)  Manufactured sand is very high in salt content. C

Question 2

Although not as strong as previous cements, portland cement is less expensive and therefore more widely used.

Accepted Answer

A) True 
 B)False  False

Question 3

Good quality sand is available in only one type: manufactured.

Accepted Answer

A) True 
 B)False  False

Question 4

Clay was the first material to be used for mortar.

Accepted Answer

A) True 
 B)False

Question 5

The ability of mortar to reknit or reseal itself if hairline cracks occur is called _____ .

Accepted Answer

A)  flexibility 
B)  autogenous healing 
C)  compressive strength 
D)  adhesion

Question 6

_____ portland cement is used in masonry when moderate sulfate resistance or moderate heat of hydration is desired.

Accepted Answer

A)  Type A 
B)  Type B 
C)  Type I 
D)  Type II

Question 7

Portland cement is a _____ cement, which means that it sets and hardens by a chemical reaction with water.

Accepted Answer

A)  hydraulic 
B)  natural 
C)  hydrated 
D)  lime-sand

Question 8

The production of portland cement involves only one simple process.

Accepted Answer

A) True 
 B)False

Question 9

A _____ will usually be classified as Type M, Type S, or Type N.

Accepted Answer

A)  blended hydraulic cement 
B)  mortar cement 
C)  masonry cement 
D)  portland cement

Question 10

ASTM C150 covers _____ types of portland cement, but only _____ are recommended for use in masonry mortars.

Accepted Answer

A)  four; two 
B)  five; four 
C)  seven; five 
D)  eight; three

Question 11

_____ is formed by calcining pieces of limestone under controlled heat.

Accepted Answer

A)  Slaked lime 
B)  Quicklime 
C)  Hydrated lime 
D)  Hydraulic lime

Question 12

Mortar performance is greatly influenced by the choice and amount of cement materials in the mix.

Accepted Answer

A) True 
 B)False

Question 13

Lime-based mortar is high in _____, which means that the mortar resists drying effects when combined with the masonry Chapters to build a wall.

Accepted Answer

A)  water retentivity 
B)  bond strength 
C)  workability 
D)  tensile strength

Question 14

ASTM C1329 applies to ______, a hydraulic cement similar with the added requirement of meeting a minimum bond strength.

Accepted Answer

A)  blended hydraulic cement 
B)  mortar cement 
C)  masonry cement 
D)  portland cement

Question 15

Which of the following statements is true regarding water used in mortar?

Accepted Answer

A)  It should be high in alkalis but low in salts. 
B)  It should be high in both salts and acids. 
C)  Purifying chemicals in city water supplies have an adverse effect on mortar. 
D)  Water fit to drink is acceptable for use in mortar.

Exam 12: The Development of Mortar

Which of the following statements is true about sand?

Although not as strong as previous cements, portland cement is less expensive and therefore more widely used.

Good quality sand is available in only one type: manufactured.

Clay was the first material to be used for mortar.

The ability of mortar to reknit or reseal itself if hairline cracks occur is called _____ .

_____ portland cement is used in masonry when moderate sulfate resistance or moderate heat of hydration is desired.

Portland cement is a _____ cement, which means that it sets and hardens by a chemical reaction with water.

The production of portland cement involves only one simple process.

A _____ will usually be classified as Type M, Type S, or Type N.

ASTM C150 covers _ types of portland cement, but only _ are recommended for use in masonry mortars.

_____ is formed by calcining pieces of limestone under controlled heat.

Mortar performance is greatly influenced by the choice and amount of cement materials in the mix.

Lime-based mortar is high in _____, which means that the mortar resists drying effects when combined with the masonry Chapters to build a wall.

ASTM C1329 applies to ______, a hydraulic cement similar with the added requirement of meeting a minimum bond strength.

Which of the following statements is true regarding water used in mortar?