,CALIFORNIA DRILLING, BLASTING, AND OIL FIELD WORK CONTRACTOR LICENSE
EXAM ACTUAL PREP QUESTIONS AND WELL REVISED ANSWERS - LATEST AND
COMPLETE UPDATE WITH VERIFIED SOLUTIONS – ASSURES PASS
1. Which California agency primarily regulates contractor licensing for drilling
and blasting work?
A. California Department of Industrial Relations
B. Contractors State License Board (CSLB)
C. California Environmental Protection Agency
D. Division of Oil, Gas, and Geothermal Resources
The CSLB is responsible for licensing and regulating contractors
performing drilling, blasting, and oil field work in California.
2. Before performing blasting operations, a contractor must ensure compliance
with which requirement?
A. Local zoning approval only
B. OSHA notification only
C. Proper permits and certified blaster qualifications
D. CSLB bond increase
Blasting requires permits and certified personnel to ensure safety and legal
compliance.
3. What is the primary purpose of a blast plan?
A. To estimate project costs
B. To assign crew schedules
C. To control blast effects and ensure safety
D. To meet insurance requirements
, A blast plan details procedures to minimize hazards and control vibration,
flyrock, and noise.
4. In oil field drilling, what does “mud circulation” primarily control?
A. Equipment lubrication
B. Well pressure and cuttings removal
C. Fuel consumption
D. Noise reduction
Drilling mud maintains pressure balance and carries cuttings to the surface.
5. Which factor most affects ground vibration during blasting?
A. Type of drill rig
B. Charge weight per delay
C. Crew experience
D. Weather conditions
Charge weight per delay is the main determinant of vibration levels.
6. What document must be kept on-site during blasting operations?
A. Contractor’s resume
B. Equipment invoices
C. Approved blasting permit
D. CSLB application form
Regulations require permits to be available for inspection.
7. Which explosive is most commonly used in construction blasting?
A. Black powder
B. ANFO (Ammonium Nitrate Fuel Oil)
C. TNT
D. Dynamite only
ANFO is widely used due to cost-effectiveness and stability.
, 8. In California oil fields, which agency oversees well drilling and
abandonment?
A. CSLB
B. OSHA
C. Division of Oil, Gas, and Geothermal Resources (DOGGR)
D. Cal/OSHA Appeals Board
DOGGR regulates oil and gas well operations.
9. What is the primary hazard of improper stemming in blast holes?
A. Excessive drilling time
B. Flyrock and reduced confinement
C. Increased fuel costs
D. Equipment overheating
Proper stemming confines explosive energy and prevents flyrock.
10. Which personal protective equipment is mandatory during blasting setup?
A. Hearing protection only
B. Gloves only
C. Helmet, eye, and hearing protection
D. Steel-toe boots only
Multiple PPE items are required to protect against various hazards.
11. What does “misfire” mean in blasting operations?
A. Delayed detonation
B. Failure of an explosive to detonate
C. Excessive vibration
D. Incorrect drill depth
A misfire is an undetonated explosive that poses serious risk.
12. How long must misfires typically be guarded before re-entry?
A. 5 minutes
EXAM ACTUAL PREP QUESTIONS AND WELL REVISED ANSWERS - LATEST AND
COMPLETE UPDATE WITH VERIFIED SOLUTIONS – ASSURES PASS
1. Which California agency primarily regulates contractor licensing for drilling
and blasting work?
A. California Department of Industrial Relations
B. Contractors State License Board (CSLB)
C. California Environmental Protection Agency
D. Division of Oil, Gas, and Geothermal Resources
The CSLB is responsible for licensing and regulating contractors
performing drilling, blasting, and oil field work in California.
2. Before performing blasting operations, a contractor must ensure compliance
with which requirement?
A. Local zoning approval only
B. OSHA notification only
C. Proper permits and certified blaster qualifications
D. CSLB bond increase
Blasting requires permits and certified personnel to ensure safety and legal
compliance.
3. What is the primary purpose of a blast plan?
A. To estimate project costs
B. To assign crew schedules
C. To control blast effects and ensure safety
D. To meet insurance requirements
, A blast plan details procedures to minimize hazards and control vibration,
flyrock, and noise.
4. In oil field drilling, what does “mud circulation” primarily control?
A. Equipment lubrication
B. Well pressure and cuttings removal
C. Fuel consumption
D. Noise reduction
Drilling mud maintains pressure balance and carries cuttings to the surface.
5. Which factor most affects ground vibration during blasting?
A. Type of drill rig
B. Charge weight per delay
C. Crew experience
D. Weather conditions
Charge weight per delay is the main determinant of vibration levels.
6. What document must be kept on-site during blasting operations?
A. Contractor’s resume
B. Equipment invoices
C. Approved blasting permit
D. CSLB application form
Regulations require permits to be available for inspection.
7. Which explosive is most commonly used in construction blasting?
A. Black powder
B. ANFO (Ammonium Nitrate Fuel Oil)
C. TNT
D. Dynamite only
ANFO is widely used due to cost-effectiveness and stability.
, 8. In California oil fields, which agency oversees well drilling and
abandonment?
A. CSLB
B. OSHA
C. Division of Oil, Gas, and Geothermal Resources (DOGGR)
D. Cal/OSHA Appeals Board
DOGGR regulates oil and gas well operations.
9. What is the primary hazard of improper stemming in blast holes?
A. Excessive drilling time
B. Flyrock and reduced confinement
C. Increased fuel costs
D. Equipment overheating
Proper stemming confines explosive energy and prevents flyrock.
10. Which personal protective equipment is mandatory during blasting setup?
A. Hearing protection only
B. Gloves only
C. Helmet, eye, and hearing protection
D. Steel-toe boots only
Multiple PPE items are required to protect against various hazards.
11. What does “misfire” mean in blasting operations?
A. Delayed detonation
B. Failure of an explosive to detonate
C. Excessive vibration
D. Incorrect drill depth
A misfire is an undetonated explosive that poses serious risk.
12. How long must misfires typically be guarded before re-entry?
A. 5 minutes
