2016 Civil Engineering Paper - I_2

Consider the following statements : 1. There will be no defects in select grade timbers. 2. The codal values for strength of grade-II timber without defects may be reduced by 37·5%. 3. For timber used as columns, the permissible stress in ungraded timbers is adopted with a multiplying factor of 0·50. 4. In case of wind force and earthquakes, a modification factor of 1·33 is adopted. Which of the above statements are correct ?

Consider the following statements regarding timber : 1. The strength of timber increases by Kiln seasoning. 2. Cutting of wood is to be done prior to treatment. 3. Water seasoning is good for prevention of warping. 4. ASCU treatment enhances the strength of wood. Which of the above statements are correct ?

Gase(s) emitted during rotting or decomposition of timber is/are mainly

Efflorescence of bricks is due to

Disintegration of brick masonry walls is primarily due to 1. Efflorescence 2. Magnesium sulphate in bricks 3. Calcined clay admixtures 4. Kankar nodules Which of the above statements are correct ?

Consider the following tests : 1. Transverse strength test 2. Water absorption test 3. Impact test 4. Breaking strength test Which of the above are relevant to testing of tiles ?