Building Material - Bricks question

MCQ about Bricks

Which of the following is the main reason to provide frog in the bricks?

1. Print manufacturer’s name.
2. Form keyed joint between brick and mortar.
3. Improve thermal insulation
4. Reduce the weight of brick.

 

Form keyed joint between brick and mortar.
Frog: It is an indentation or depression on the face of a brick made with the object forming a key for the mortar. This prevents displacement of the brick above.
∴ The term frog means a depression on a face of bricks.
Some other definitions:
1. Quoins is the exterior angle of a wall.
2. Closer is the portion of brick cut in such a manner that its one long face remains un-cut.
3. Bat is the portion of brick cut across width.
4. Perpend is that vertical joint on the face of wall, which lies directly above the vertical joints in alternative course.
5. Stretcher: Bricks are laid along its length.
6. Header: Bricks are laid perpendicular to the face of wall.

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