This set of Construction and Building Materials Multiple Choice Questions & Answers (MCQs) focuses on “Shoring and its Types”.
1. Sometimes the structures are to be temporarily supported. This is achieved by what is known as the _________
a) Scaffolding
b) Shoring
c) Underpinning
d) Grouting
View Answer
Explanation: Shoring is essential for structures which have become unsafe due to an equal settlement of foundation or due to removal of the adjacent building or due to any other reason. For safe structures, The Shoring is required to prevent movement when certain additions and alterations are being carried out.
2. In ____________ shore arrangement, the inclined supports are given to the external walls from the ground.
a) Raking shore
b) Flying shore
c) Dead shore
d) Patented shore
View Answer
Explanation: A Raking shore or Inclined shore consists of a wall plate, needles, plates, cleats, bracing and sole plate. The wall plate is placed against the wall and is secured by the means of needles which penetrate into the wall for a distance of about 150 mm. The wall plate distributes the pressure evenly.
3. In __________ arrangement, the horizontal supports are given two parallel walls which have become unsafe due to the removal or collapse of the intermediate building.
a) Inclined shore
b) Raking shore
c) Dead shore
d) Flying shore
View Answer
Explanation: A Flying shore consists of wall plate, needles, cleats, strut, straining pieces and folding wedges. The flying shore should have a depth of not less than 1/13th of the clear span and width should not less than 1/15th of its length.
4. In ___________ arrangement, the horizontal members, known as the needles are supported by vertical members.
a) Horizontal shore
b) Flying shore
c) Dead shore
d) Raking shore
View Answer
Explanation: In Dead shore arrangement, the needles are driven at right angles to the wall through the holes made in the wall. A Dead shore is used when the lower part of the wall has become defective and the foundations are to be deepened.
5. ____________ is necessary to tie back the scaffolding with the building at suitable levels.
a) Loading
b) Tying-in
c) Raising
d) Spacing
View Answer
Explanation: Tying-in scaffold can be achieved in different ways: A vertical or horizontal tube, wedged by means of a rebel pn, may be provided in an opening and one of the ends of the Putlogs maybe coupled with this tube.
6. The loading on the scaffolding decides the __________ of standards.
a) Bedding
b) Raising
c) Finishing
d) Spacing
View Answer
Explanation: The spacing of standards is less for heavy loading and more for light loading. The maximum spacing is about 3 metres.
7. If the standards or not resting on the firm ground, the _________ of the standard should be provided and their bottom ends.
a) Bedding
b) Finishing
c) Raising
d) Spacing
View Answer
Explanation: If standards are not resting on the firm ground, the base plates of suitable size should be provided at their bottom ends. Further, if required, Timber sole plate should be provided on which all base plates rest.
8. In ___________ shores, the needles are placed at a distance of about 1.5 m to 2 m and they are suitably braced.
a) Vertical shores
b) Horizontal shore
c) Inclined shore
d) Raking shore
View Answer
Explanation: In vertical shores, the folding wedges, sole plate, dogs and braces are used. A Raking shore may be provided as an additional safety especially in case of weak walls.
9. ___________ type of Shoring is suitable for a maximum distance of about 9 m between the adjacent parallel walls.
a) Dead shore
b) Raking shore
c) Vertical shore
d) Flying shore
View Answer
Explanation: But when the distance is between 9 m to 12 m, a Compound or Double Flying shore is provided. It should be seen that both the horizontal shores are symmetrical placed with respect to the floor levels.
10. The ____________ should be preferably Inclined at 45° with the ground.
a) Horizontal shore
b) Raking shore
c) Dead shore
d) Vertical shore
View Answer
Explanation: However, in actual practice, the angle of inclination in Raking or Inclined shore may vary from 45° to 75°. The top raker should not be inclined steeper than 75° with the horizontal.
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