瓦检员考试复习题09（Examiner exam questions 09）.docVIP

瓦检员考试复习题09（Examiner exam questions 09） Pocke (pocke) 1. in gas inspection at the roof, should use the gas inspection stick and lengthened lengthened hose 1.5 meters out into the depths of roof falling zone check gas. () Standard answer: B. (pocke) 2. using optical gas detector to check gas concentration, reading need to be accurate to second decimal places. () Standard answer: B. (pocke) 3. three inspection system refers to the working face gas concentration in air flow check on work place before charging, charging, blasting. () Standard answer: X (pocke) gas check 4. coal face of blasting site, shall be within the range of 30 meters in the air inlet under along the working face coal wall. () Standard answer: X (pocke) gas inspection in 5. working face of blasting site, should be carried out on the site and the inward airflow within the local gas accumulation at the range of 20 meters (). Standard answer: X (pocke) 6. two heading face through, only in the two working face and back to the gas concentration in air flow (), the tunneling working surface can be blasting. A. are below 0.5% and B. are below 1% C. driving face is less than 1%, stopping face is below 1.5%, and D. is below 1.5% Standard answer: B (pocke) 7. local fan ventilation before recovery, must check the gas. The local fan can be started only when the gas concentration in the airflow is less than 10 meters within the local fan and its switch. A. 0.5% B. 0.75% C. 1% Standard answer: A (pocke) 8. inspection work in high gas coal mine gas outburst mine or mining face, must wear () and can master the good method of using self rescuer. A. filter self rescuer B. isolated self rescuer C. any kind can Standard answer: B (pocke) 9. in the inner product local gas accumulation or temporary stop wind poly gas, the gas concentration and the concentration of carbon dioxide () the case, security measures must be taken to control airflow. The gas emission, no cancellation. A. no more than 2.5% B. no more than 3% C. no