Mine Ventilation and Safety1

b

1. A qualified mine safety engineer in a certain mining company should be a. licensed metallurgical engineer with two years experience in safety works b. licensed mining engineer with one year experience in mining operation c. licensed geology d. safety inspector

d

1. How many times of power required in order developing twice the volume? a. 7 times the power c. 5 times the power b. 6 times the power d. 8 times the power

b

1. The total fatal and non-fatal lost time accidents per million man-hours work. a. Accident severity rate c. Total accident rate b. Accident frequency rate d. Total last time accident

a

10. Any mine working that will be driven under rivers, seas, or any accumulation of standing or running water on massive, unbroken or un-fractured igneous rock shall have a thickness of _______from the true river bed to the roof of mine working. a. 25 meters b. 25-30 meters c. 50 meters d. 30-50 meters

b

10. It is the underground mine gas otherwise called as "stink damp". a. Sulfur dioxide c. Methane b. Hydrogen Sulfide d. Carbon Monoxide

c

11. Any mine working that will be driven under rivers, seas, or any accumulation of standing or running water on broken, or fractured igneous rock shall have a thickness of _______from the true river bed to the roof of mine working. a. 25 meters b. 25-30 meters c. 50 meters d. 30-50 meters

d

11. It is the underground mine gas otherwise called as "sweet damp". a. Nitrogen Dioxide c. Methane b. Hydrogen Sulfide d. Carbon monoxide

c

12. According to the "green book" no stoping shall be undertaken within _______meter radius from the main shaft. a. 25 meters b. 18 meters c. 16 meters d. 50 meters

d

12. It is the underground mine gas otherwise called as "white damp". a. Nitrogen dioxide c. Methane b. Hydrogen Sulfide d. Carbon monoxide

a

13. In a subsidence zone of a lock caving operation, regular backfilling of the area shall be undertaken to maintain a minimum of ______% gradient over the subsidence area to drain off rain water. a.6% b. 3% c. 2% d. 7%

c

13. It is the underground mine gas otherwise called as "marsh gas". a. Nitrogen dioxide c. Methane b. Hydrogen sulfide d. Carbon Monoxide

a

14. It is the underground mine gas otherwise called as "choke or black damp". a. carbon dioxide c. Méthane b. Hydrogen Sulfide d. Carbon Monoxide

b

14. Tailings and slurries may be used as backfill in a subsidence area. a. True b. false c. Permissible d. depending on the specific gravity

c

15. The amount of oxygen in underground mines required under the "Revised Mines Safety Rules and Regulations" is: a. 18% by volume c. 20% by volume b. 19% by volume d. 21% by volume

b

15. The vertical height of working benches shall be kept at a maximum of______ meters above the maximum reach of the shovel/loader being used. a. 2 meters b. 1.5 meters c. 3.5 meters d. 5 meters

d

16. It is the "Revised Mines Safety Rules and Regulations" issued by the Department of Environment and Natural Resources. a. DENR Administrative Order No. 82, Series of 1990 b. DENR Administrative Order No. 57, Series of 1990 c. Mines Administrative Order No. MRD - 21 d. Mines Administrative Order No. MRD - 51

d

17. The maximum allowed of concentration allowed for hydrogen in underground mines as per "Revised Mines Safety Rules and Regulations". a. <6.0% by volume c. <7.0% by volume b. <5.0% by volume d. <4.0% by volume

b

18. The threshold limits value of sulfur dioxide as per "Revised Mines Safety Rules and Regulations". a. 0.0030% by volume c. 0.0010% by volume b. 0.0005% by volume d. 0.001% by volume

a

19. The threshold limits value of oxides of nitrogen as per "Revised Mines Safety Rules and Regulations". a. 0.0005% by volume c. 0.0001% by volume b. 0.0030% by volume d. 0.0010% by volume

a

2. The class "A" mine underground has at least of number _____ workers. a. 150 c. 250 b. 125 d. 200

a

2. The days lost per million man-hours worked. a. Accident severity rate c. Total accident rate b. Accident frequency rate d. Total lost time accident

a

2. The fan law states that in order to develop twice the volume, how many times the speed is required? a. 2 times the velocity c. 4 times the velocity b. 3 times the velocity d. 5 times the velocity

c

20. The threshold limits value of hydrogen sulfide as per "Revised Mines Safety Rules and Regulations". a. 0.01% by volume c. 0.10% by volume b. 0.20% by volume d. 0.30% by volume

a

21. The threshold limits value of carbon monoxide as per "Revised Mines Safety Rules and Regulations". a. 0.01% by volume c. 0.03% by volume b. 0.02% by volume d. 0.04% by volume

c

22. The threshold limits value of carbon dioxide as per "Revised Mines Safety Rules and Regulations". a. 1.00% by volume c. 0.50% by volume b. 0.75% by volume d. 0.25% by volume

d

23. Hydrogen gas is explosive with this range of concentration. a. 1%-71% by volume c. 10%-80% by volume b. 7%-77% by volume d. 4%-74% by volume

d

24. Methane is explosive with this range of concentration: a. 1%-10% by volume c. 10%-20% by volume b. 15%-25% by volume d. 5%-15% by volume

d

3. According to the fan laws, twice the volume develops how many times the pressure? a. 7 times the pressure c. 5 times the pressure b. 6 times the pressure d. 4 times the pressure

c

3. The ideal number of mine rescue team should be a. 3 c. 5 b. 9 d. 10

d

3. ____________shall mean those that will prevent the injured from reporting to work on the working day following the day of injury and thereafter. a. Accident severity rate c. Total accident rate b. Accident frequency rate d. Lost time accident

a

4. An underground and surface mine which employs a total of net less than 150 and 250 employees respectively is classified as an: a. Class A c. Class C b. Small Scale d. Large Scale

d

4. It is a type of ventilation which is efficient and generally dependable. a. Naturel ventilation c. Natural draft b. Lime dusting d. Mechanical ventilation

b

4. The required number of safety engineers in a class "A" mine. a. Two full-time c. not necessary b. One full-time d. at least two

c

5. An underground and surface mine which employs a total of not more than 50 and 75 employees respectively is classified as an: a. Class A c. Class C b. Small Scale d. Large Scale

b

5. The deputized safety inspector should have a. five years experience safety works b. at least ten years in service in the company c. three years in underground d. one year in safety work

d

5. The type of ventilation that utilizes the application of fans, vents, tubing's and baggings. a. Natural ventilation c. Natural draft b. Lime Dusting d. Mechanical Ventilation

c

6. A Class "A" mine shall have at least: a. 1 part-time Safety Inspector and Deputy Inspector b. 1 part-time Safety Engineer and 1 full-time Safety Inspector c. 1 full-time Safety Engineer and Safety Inspector d. 1 full-time Safety Engineer

b

6. The age requirement accepted in underground mine should be a. 16 c. 20 b. 18 d. 21

a

6. The type of ventilation in which density change in air columns causes alteration in natural draft pressure resulting to unpredictable air volume flow. a. Natural ventilation c. Natural draft b. Lime Dusting d. Mechanical Ventilation

c

7. A Class "B" mine shall have at least: a. 1 part-time Safety Inspector and Deputy Engineer b. 1 part-time Safety Engineer and 1 full-time Safety Inspector c. 1 full-time Safety Engineer and Safety Inspector d. 1 full-time Safety Engineer

b

7. In surface mining, workers should be at least 250 persons in order to classify this mine as a. Class B c. Class C b. Class A d. Class D

a

7. It results from pressure differential due to unequal densities or 2 air columns. a. Natural Ventilation c. Relative density b. Static Pressure d. Mechanical Ventilation

b

8. A Class "C" mine shall have at least: a. 1 part-time Safety Inspector and Deputy Inspector b. 1 part-time Safety Engineer and 1 full-time Safety Inspector c. 1 full-time safety Engineer and Safety Inspector d. 1 full-time Safety Engineer

a

8. In Class B mine, the safety engineer required should be a. One full-time c. at least one b. One part-time d. One full-time and One part-time

a

8. It is otherwise called as "natural draft a. Natural Ventilation c. Ventilation b. Wind d. Pressure

c

9. An employee may be designated as and Deputy Safety Inspector by his employer if the employee has an experience in safety work or mining operations for at least: a.5 - 10 years b. 15 years c. 10 years d. 10 - 15 years

a

9. It is the underground mine gas otherwise called as "laughing gas". a. Nitrogen Dioxide c. Methane b. Hydrogen Sulfide d. Carbon Monoxide

d

9. The temporary safety inspector should renew its temporary license every a. two years c. quarterly b. three years d. every year