UNIVERSITY OF TECHNOLOGY

Note: Answer only FOUR questions from the following questions Q1 / AA steel rod is used to support a weight of 20 kN as shown in Fig 1. If the allowable stress is 138 N/mm. Determine the diameter of the rod and its final length. The length of the bar is 61 cm, and the modulus of elasticity for steel is 206.85*10N/mm (16 %) Q1/ B – Give the reasons for the followings: I. Alkalis are considered harmful ingredients in clay bricks II. The problem of efflorescence does not arise in sand – lime bricks. III. A small quantity of iron oxide in clay bricks ( 5-6% ) is desirable. (9%)