Civil war-Day 17-Oct 13-KWA-TIMBER,CEMENT,FILLERMATERIALS,LIME

Front

IS Code which recommends the methods of testing of small clear specimens of timber is —

Back

IS 1708 : 1986

Answer explanation

IS 1708:1986 specifies testing methods for small clear specimens of timber.

Front

An example of an endogenous tree is —

Back

Bamboo

Answer explanation

Bamboo is an endogenous tree; growth occurs inward by deposition of tissues.

Front

The process of hardening of lime after it has been converted into paste form is known as —

Back

Setting

Answer explanation

Setting is the hardening of lime paste; slaking is CaO → Ca(OH)₂.

Front

Which class of lime is used as mortar for masonry works?

Back

Class B

Answer explanation

Class B (semi-hydraulic) lime is used for masonry mortars.

Front

Early attainment of strength in rapid hardening cement is mainly due to —

Back

Finer grinding

Answer explanation

Rapid hardening cement is ground finer to increase early strength.

Front

For complete hydration of cement, the water–cement ratio needed is —

Back

More than 0.35 but less than 0.45

Answer explanation

Complete hydration typically needs w/c ≈ 0.38–0.42; hence 0.35–0.45 is correct.

Front

According to chemical composition, total sulphur content in cement shall not be more than —

Back

2.75%

Answer explanation

Limit for total sulphur content is 2.75%.

Front

What is the designation of a combined mortar with principal binding material (x), secondary binding material (y), and sand (z)?

Back

x : y : z

Answer explanation

Notation x:y:z represents binder : secondary binder : sand.

Front

The mortar having bulk density less than 15 kN/m³ is called —

Back

Light weight mortar

Answer explanation

Bulk density < 15 kN/m³ ⇒ light-weight mortar.

Front

What does 'MM 1.5' mean?

Back

Masonry Mortar of compressive strength 1.5 N/mm²

Answer explanation

MM 1.5 denotes compressive strength 1.5 N/mm² for masonry mortar.