1. Flexural Strenght Determination : Test prism No. 1: Length 159.4 mm Width: 40.0 mm Height: 40.0mm

Mass : 582 g Maximum Load: 3.6 KN

Test Prism No. 2: Length : 159.4 mm Width: 40.0 mm Height: 40.0mm

Mass: 575 g Maximum Load: 3.6 KN

Test Prism No. 3: Length : 159.6 mm Width: 40.0 mm Height: 39.9 mm

Mass: 586 g Maximum Load: 3.6 KN

2. Compressive Strength Determination :

Maximum Load (prism halves) (kN) : 82.0 84.3 75.7 80.4 71.8 74.2

Decide, if the test is valid according EN 197-1!

Decide, if the cement complies with the requirements of EN 197-1

Amass of m 1.5 kg of steam is contained in a closed rigid container. initially the pressure and temperature of the steam are: p 1.5 mpa and t 240°c (superheated state), respectively. then the temperature drops to t2= 100°c as the result of heat transfer to the surroundings. determine: a) quality of the steam at the end of the process, b) heat transfer with the surroundings. for: p1.5 mpa and t 240°c: enthalpy of superheated vapour is 2900 kj/kg, specific volume of superheated vapour is 0. 1483 m/kg, while for t 100°c: enthalpy of saturated liquid water is 419kj/kg, specific volume of saturated liquid water is 0.001043m/kg, enthalpy of saturated vapour is 2676 kj/kg, specific volume of saturated vapour is 1.672 m/kg and pressure is 0.1 mpa.

The mass flow rate of the fluid remains constant in all steady flow process. a)- true b)- false

Thermal stresses are developed in a metal when its a) initial temperature is changed b) final temperature is changed c) density is changed d) thermal deformation is prevented e) expansion is prevented f) contraction is prevented