1. The purpose of gas testing is to provide__________ requirements for the use of portable gas monitors.

  A. Minimum


2. Gas testing is applicable to Aramco ___________ for conducting gas test by using portable gas monitor.

  a.) community 

  b.) Restricted Areas

  c.) High Security Areas 

  d.) Low security Areas

  e.) All of the above 

 A. e.) All of the above


3. Calibration check.:

 A. A Test to demonstrate that the sensor(s) and alarms respond to the gas within manufacturer's acceptable limits.


4. Certified Gas Tester.:

  A. A person who has been trained, certified and appointed in writing to conduct gas tests.


5. Function test.: 

 A. A test of gas monitor where a challenge gas is passed over the sensor(s) at a concentration and exposure time sufficient to activate all alarm indicators to present at least their lower alarm setting.


6. IDLH is stand for____

 A. Immediately dangerous to life and health.


7. LEL means 

  A. Lower Exposure Limits.


8. Portable gas monitor 

 A. An instrument which measures the presence of combustible gases/ vapors,  toxic gas and oxygen in air.


9. PPM is stand for

 A. Part Per Million


10. How many gas monitor should be owned by a section?

  A. 4 gas monitors : 2 working at the time


11. For how long a certificate of a gas tester is valid? 

  A. 2 years 


12. When do we need to perform gas monitor functionally test?

  A. At first use on daily basis

13. Who is responsible for entering gas test result on the work permit? 

  A Gas Tester 

14. Oxygen testing is required in 

  A. confined space and potential area

15. Combustible gas testing is required in 

A. Confined space hot work in restricted areas and potential areas

16. Hydrogen sulphide gas testing is required in 

 A. Combined spaces and potential areas

17. What is the maximum safe level of Oxygen 

  A. 23.5%

18. what is the minimum allowable percentage of oxygen for LEL direction

  A. 16%

19. What is the normal concentration of oxygen in air?

  A. 21%

20. What is the effect oxygen if exist 23.5%?

  A. Increase fire hazard 

21. What is the minimum safe level of oxygen?

  A. 20%


22. Function test shall be carried out by the users and record of these tests shall be  maintained in 

A. equipment check list


23. Gas monitor inspection does  not include: 

  A. Certificate and calibration document 


24. What is the suitable temperature to store gas cylinders used in gas monitor calibration? 

  A. Less than 51.7°C 


25. What is the word "acute" means?

   A. Short Term 


26. What are the 2 common gas monitor types in industry?

   A. 3-in-one & 4-on-one


27. Which sensor is replaceable in gas monitors?

  A. H2S


28. Which gases detected by three in one gas monitors?

   A. LEL, Oxygen & H2S 


29. Which gases deducted by 4 in 1 Gas monitors?

   A. LEL, CO, OXYGEN & H2S


30. _______ oxygen is needed for good compatible gas testing.

    A. 20%