This set of Basic Civil Engineering Multiple Choice Questions & Answers (MCQs) focuses on “Plastering”.
1. Plastering is also called:
Explanation: Pargeting is decorative or water proof plastering that is applied on the walls.
2. __________ is used to ensure that the thickness of plastering is uniform.
a) Bull point
b) Pivot point
c) Bull mark
d) Bench mark
Explanation: It is provided at specific distance to make sure that the required thickness of plastering is even throughout. It is a small rectangular or hexagonal mark.
3. Before plastering, the surface has to be:
Explanation: All the mortar joints and the brick surface has to be slightly scraped so as to obtain a rough surface. Plastering will be able to bond better on to a rough surface.
4. Which IS code gives specifications about cement plaster?
a) IS 1500
b) IS 1221
c) IS 1400
d) IS 1661
Explanation: IS code 1661 deals with the code of practice for the application of cement and cement-lime plastering on buildings.
5. Which of the below is not a plaster type based on material?
Explanation: Plastering requires a binding material and aggregates. The binding material is cementitious-cement, lime and gypsum. Pozzolana are siliceous compounds and possess no cementitious nature as such. When mixed with water, they can act as cementitious material. But are generally not used in plastering.
6. In plastering, the 1st coat is called ___________ and its thickness should be _______ mm.
a) Undercoat, 6-9
b) Floating coat, 6-9
c) Floating coat, 10-15
d) Undercoat, 10-15
Explanation: Plastering can either be done in single, 2 or 3 coats. The 1st coat is undercoat of thickness of 10-15mm. 2nd coat is floating coat of 6-9mm thickness. The last coat is the finishing coat of 2-3mm thickness.
7. ___________ are used to press mortar and spread it uniformly.
b) Aluminium rod
Explanation: Trowel is used for gauging and applying mortar to surface. Aluminium rod is used to strike off excess mortar. Brush is used to clean it.
8. Wood surface requires _________ coats of plastering.
Explanation: Wood and metal surface require 3 coats of plastering, so that the surface is completely safe and sealed. Stone and brick masonry generally requires 2 coats and single coat is done for low cost construction.
9. In a lime-cement plaster, ratio 1:1:6 corresponds to:
Explanation: In plastering, a binding material and fine aggregate is used. Since in lime-cement plaster, 2 binding materials are present, a ratio of both material and sand is taken.
10. Which of the below is not a plaster finish?
b) Pebble dash
c) Sand faced
Explanation: There is no wooden plaster finish available. Rough-cast is provided to external surface using 1:1:3 mortar (cement:sand:coarse aggregates). Pebble or flint dash finish involves embedding 10-20mm sized pebbles or flints in 12mm thick plaster. Sand faced finish is provided with 1:1 mortar.
11. Mud plastering does not require curing.
Explanation: In mud plastering, after 2 coats of plastering, a wash of earth, cow dung and cement in 3:2:1 proportion is done. It does not require curing, but should be allowed to dry in shade for 3-4 days.
Sanfoundry Global Education & Learning Series – Basic Civil Engineering.
To practice all areas of Basic Civil Engineering, here is complete set of 1000+ Multiple Choice Questions and Answers.