Question

.) In markings for underground utilities after a “Call Before You Dig” locate has been done, yellow paint on the ground would indicate:

1. Electric
2. Gas
3. Fiber optic
4. Sewer
5. None of the above

16.) Regarding STELs, the relevant time period is on average is typically a ________ minute period.

1. 10
2. 15
3. 20
4. 25
5. 30

17.) Based on class lecture, on trenching excavation, the minimum depth that requires trench shoring is ____ feet

1. 3
2. 4
3. 5
4. 6
5. 7

18.) Currently, according to class lecture, the best method to check underground utilities for both location and depth is via ____________ methods

1. Ground X-ray
2. Electronic
3. Vacuum potholing
4. Magnetometer
5. None of the above

Answer 1

Solution is posted below.

Hope it helps.

15:Yellow color marking is for gas oil steam and petroleum etc.

Hence option b is correct.

16:STEL short term exposure limit. As per it 15 minute time period is not exceeded.

Option B .

17:Trench shoring i.e bracing is required for 5 feet or deeper as per osha.

Option c.

18:Though all the methods given can be helped in finding utility location but ground penetration radar can be employed to find depth too.

Hence option a is ths answer.