Building Materials and Construction, Objective Type Question Part-I

Gypsum is a : Chemically Precipitated Sedimentary Rock

Sedimentary rocks which changes into quartzite by metamorphic action: Sand Stone

Quartzite is a:  Silicious Rock

Slate is formed by metamorphic action of: Shale

Sandstone is a:  aqueous, silicious & sedimentary rock

A heavy stone is suitable for: Retaining Walls

Stone suitable for rubble masonary should be: Tough

Which metamorphic rock has the most weather resisting characteristics: Quartzite

A good building stone should not absorb water more than: 5%

Jumper is a tool used for: Quarrying Of Stone

The important test to be conducted on a stone used in docks & harbours is: Weight Test

The predominant constituent which is responsible for strength in granite is: Quartz

Granite is not suitable for ordinary building purpose because: It is costly

Stone which is suitable for construction of piers & abutments of a railway bridge: Granite

The p[reparation of surface of stone to obtain plain edges or to obtain stones of required size & shape is known as: Dressing Of Stones

Crushing strength of good building stone should be more than: 100Mpa

Specific gravity for most of building stones lies between: 2.5 to 3.0

Spalling Hammer is used for: Breaking small projection of stones

Cross cut saw is used for: Cutting Hard Stones

Sapwood consists of : Portion of timber between heartwood and cambium layer

The radial splits which are wider on the outside of the log & narrower towards the pith are known as: Starshakes

Trees yielding soft wood: Chir & Deodar

A tree yielding hard wood: Shishum

The disease of dry rot in timber is caused by: Lack of ventilation

Plywood has the advantage of: Same tensile strength in all directions

In which of the following directions, the strength of timber is maximum: Parallel to grains

The moisture content in a well seasoned timber is : 10% to 12 %

The trunk of tree left after cutting all the branches: Log

The age of tree can be known by examining: Annual Rings

Plywood is made by bounding together thin layers of wood in such a way that the angle between grains of any layer to grains of adjacent layers is : 90 degree

The plywood has: greater impact resistance to blows than ordinary wood

The practical limit of moisture content achieved in air drying of timber is: 15%

First class timber has an average life of: More than 10 years

Crushing Strength of 1st Class brick should not be less than: 10.5 N/mm2

The main fuction of alumina in brick earth is : To impart plasticity

The % of alumina in good brick earth lies between: 20% – 30%

Excess of alumina in brick earth makes the brick: To crack & warp on drying

The nominal size of modular brick is: 200mm x 200mm x 100mm

Percentage of silica in good brick earth lies between: 50% to 60%

Excess of silica in brick earth results in:  Loss of cohesion

Which ingredient of brick earth enables the brick to retain it’s shape: Silica

Building Materials and Construction, Objective Type Question Part-II

The process of mixing clay, water & other ingredients to make brick is known as: Kneading

Advantage of a clamp compared to a kiln for burning bricks is: It has less initial cost

The internal size of mould used in brick preparation is: Greater than size of fully burnt brick

Pug mill is used for: Preparation Of Clay

Bricks used for lining of furnaces:  Refractory Bricks

The frog of brick in a brick masonry is generally kept on: Top Face

Number of bricks required for one cubic meter of brick masonry is: 500

Glazing is used to make earthenware: Impervious

Quick lime is: Calcium Oxide

Quick lime is: Slow in setting & Rapid in slacking

Hydraulic lime is obtained by: Burning of kankar

The main constituent which imparts hydraulicity to hydraulic lime is: Clay

The main ingredients of Portland Cement are: Lime & Silica

The constituent of cement which is responsible for initial setting of cement is: Tricalcium Aluminate

The initial setting time for ordinary Portland cement as per IS specifications should not be less than: 30 minutes

The final setting time for ordinary Portland cement as per IS specifications should not be less than: 10 hours

For testing compressive strength of cement, the size of cube used is: 50mm

The normal consistency of ordinary Portland cement is about: 30%

Early attainment of strength in rapid hardening cement is mainly due to: Finer Grinding

After Storage, the strength of cement: Decreases

According to IS specifications, the compressive strength of ordinary Portland cement after three days should not be less than: 16 MPa

Addition of pozzolana to ordinary Portland cement increases: Shrinkage

Gypsum consists of: CaSO4 & H2O

For testing compressive and tensile strength of cement, the cement mortar is made  by mixing cement and standard sand in the proportions of: 1:3

The slump recommended for mass concrete is about: 25 mm to 50 mm

With increase in moisture content, the bulking of sand: first increases to a certain maximum value and then decreases

Which cement is suitable for use in massive concrete structures such as large dams: Low Heat Cement

Proper amount of entrained air in concrete results in: Better Workability & Better resistance to freezing & thawing

The most common admixture which is used to accelerate the initial set of cement is: Calcium Chloride

The maximum quantity of calcium chloride used as an accelerator in cement in percentage by weight of cement is: 2

The basic purpose of a retarder in concrete is: To increase the initial setting time of cement paste in concrete

Cement which contains maximum percentage of dicalcium silicate: Low Heat Cement

Most commonly used retarder in cement is: Gypsum

Three basic raw materials which are needed in large quantities for production of steel are: iron ore, coal & lime stone

Compared to mild steel, cast iron has: High Compressive Strength & Low tensile Strength

Which gradient exerts maximum influence on properties of steel: Carbon