Effect of sample kind, samlpe size, experimental liquid, vacuum in the container and experimental temperature on testing result of true density of refractory were studied and testing data was analyzed , It showed that accuratity of testing result can be ensured by using proper method.

The analytic result is that both "keep secret" and "report to the leadership"of testing results are important and their relationship is the key resolution.

Combined with the experience of highway testing,the author analyzes the factors influenced testing result of asphalt content test from sampling method of hot-mixed bituminous mixture,detection method of mineral powder s quality in extracting solution,and water content of mineral powder,in order to improve the accuracy of testing and to ensure the quality of bituminous mixture.

Test result analysis of indoor air quality for newly decorative residences of Chengdu in 2007

Based on the working principle of hydraulic tester,its influence on strength test result is analyzed;appropriate operating ways of the tester is proposed in order to reduce experimental error and improve accuracy of the test result.

This paper analyses and researches the influences of external condition on test result,from the aspects of observation distance,observation angle,equipment plus,air pressure,temperature,humidity,electric welding interference,dirtiness and so on,and also presents suggestions to keep the badness influences away.