Box compasses must be used with angle – measuring instruments, as the compasses operate only when the line of sight points towards magnetic north. The bearing desired must then be measured from his direction. Circular compasses can be mounted on theodolites and are often permanently mounted on transits. When provided with open sights, they can be used

Adhesion: Binds together all the components without bringing about any positive or negative changes in their properties. Bitumen has the ability to adhere to a solid surface in a fluid state depending on the nature of the surface. The presence of water on the surface will prevent adhesion. Resistance to Water: Bitumen is insoluble in water and can serve as an

Coal tar is a brown or dark black liquid of high viscosity, which smells of naphthalene and aromatic hydrocarbons. Being flammable, coal tar is sometime used for heating or to fire boilers. It can be used in coal tar soap, and is used in medicated shampoo to kill and repel head lice, and as a treatment for dandruff. Depending upon its source of origin, TAR is classified as:

The Burj al-Arab is a luxury hotel in Dubai, United Arab Emirates. At 321 metres (1,053 feet), it is the tallest building used exclusively as a hotel. The Burj al-Arab does not have ordinary rooms; rather it is divided into 202 duplex suites. We your a small suite. Suites occupy an area of 169 square metres (1,819 square feet), the largest one covers 780 square metres (8,396 square

KMn04 was used as oxidizing agent for many time pb with KMno4 was that different value of COD obtained due to strength change of KMno4. BOD value obtained greater than COD with KMno4 means KMno4 was not oxidizing all the substances.