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Masonry practice questions

45 questions from the concrete and masonry practice test.

Masonry practice test

10 questions, graded as you go, with the reason for every answer. No sign-up.

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Sample questions

Which mortar type has the highest compressive strength and is suited to heavily loaded masonry and work below grade?

  1. Type N
  2. Type O
  3. Type K
  4. Type M
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D. Type M

Type M is the strongest, about 2500 psi under the property specification, and is used for foundations, retaining walls and heavy loads. Type N is a medium-strength mortar for above-grade work.

Reference: ASTM C270, mortar types

Which mortar type is the usual general-purpose choice for exterior above-grade walls and brick veneer in normal exposure?

  1. Type M
  2. Type O
  3. Type K
  4. Type N
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D. Type N

Type N is the medium-strength, workable, general-purpose mortar for above-grade work. Type M is stronger than needed and less workable, which can hurt bond and watertightness.

Reference: ASTM C270, mortar types

A reinforced block wall must resist high wind loads and part of it is below grade. Which mortar type is commonly specified for its strength and good bond?

  1. Type S
  2. Type O
  3. Type K
  4. Type N
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A. Type S

Type S, about 1800 psi, has high bond and flexural strength and is the usual choice for reinforced masonry, lateral loads and work at or below grade. Type N is meant for milder, above-grade conditions.

Reference: ASTM C270, mortar types

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