Posts

Showing posts from January, 2013

HPTSB- Diploma -2012- Civil Engineering materials -Question Paper

Hello there,
How you doing?

This  question paper was set by the Himachal Pradesh Takniki Shiksha Board, for the end semester examination Dec 2012 for the Subject of Civil Engg. -3rd semester.

I hope it helps you to prepare for your end semester examinations. Keep looking for the solution of the questions below the list of question paper.

Sub: Civil Engg. Materials                                         Semester : 3rd
Max Marks: 100                                                        Time: 3hrs.

Note: Attempt any five questions

Q.1 (a)Give the classification of the rocks. Give two numbers of examples of each.                  -10marks.
       (b) What are the requirements of a good brick earth.                                                        - -10marks.


Q.2  With a neat and clean sketch, explain the hoffman's kiln.                                                   -20marks.

Q.3 (a)Describe in brief the method of manufacturing of Portland cement.                               …

Plywood

Plywood is a timber product, which is manufactured by many timber industries. It is made by gluing together 3 or more than 3 numbers of the veneer sheets. It is generally of 3mm or more than 3mm thickness. It is used to make the tables, chairs, beds, and many other furniture products.
Manufacturing Steps:  (1) Veneering (2) Gluing (3) Stacking (4) pressing/Loading (5)  Finishing
(1) Veneering: It is process of producing the veneer sheets from the timber logs. Veneer are the thin sheets, which are get by cutting the logs in a specific manner. (2) Gluing: Veneer sheets are glued together, the number of sheets depends upon the required thickness.  (3) Stacking :  The glued sheets are stacked in a specific manner to make them ready for the loading. (4) Pressing/Loading: The glued sheets are pressed under a heavy pressure so then they are glued together with more strength. The application of load can be done at high temperature or it may be done at low temperature. Accordingly it is known…

Asbestos - Civil Engineering Material

Asbestos is considered a Civil Engineering material, because of its properties. It was used widely in the 19th century,  and it is used throughout the history. It was detected in the early 19th century in the England, and in many countries up to 1930. It was not banned up to 1970 in the USA, and court alleged the companies for not telling the truth about asbestos, which they knew since 1930. Many deaths were reported, due to inhaling of the asbestos fibers, which causes many diseases.
Properties and uses:
It is a fibrous material, having white & blue color.
It has the fire proofing, electric proof properties, so it was widely used for making the insulating boards, used in the building construction as a reinforcing material. It was also used to make fire proof dressing.
It has good tensile strength so it was used in the construction purposes, mixed with the cement it forms the asbestos  cement.
It has shining property, so it was used in the floors and the walls and ceilings too for…