1. Which type of cement is most commonly used in residential concrete
construction?
A) Type I Portland Cement
B) Type II Portland Cement
C) Type III High Early Strength Cement
D) Type V Sulfate Resistant Cement
Answer: A
Explanation: Type I is general-purpose Portland cement, used in most
residential and commercial slabs and structures.
2. The minimum concrete compressive strength for a slab-on-grade in a
residential driveway is typically:
A) 2000 psi
B) 2500 psi
C) 3000 psi
D) 4000 psi
Answer: C
Explanation: A 3000 psi mix is standard for driveways due to vehicle load
requirements.
3. What is the maximum allowable slump for concrete used in foundations, per
ACI recommendations?
A) 2 inches
B) 4 inches
C) 6 inches
D) 8 inches
Answer: B
Explanation: Slump of 3–4 inches is common for foundation concrete to
balance workability and strength.
,4. Which test measures the air content of fresh concrete?
A) Slump test
B) Kelly Ball test
C) Pressure meter test
D) Schmidt hammer test
Answer: C
Explanation: The pressure meter (Type B) is used to measure air entrainment in
fresh concrete.
5. In Nevada, reinforcing steel bars must meet which ASTM standard?
A) ASTM A36
B) ASTM A615
C) ASTM A706
D) ASTM C150
Answer: B
Explanation: ASTM A615 covers deformed and plain carbon-steel rebars used
in concrete.
6. The curing time required for concrete to reach approximately 70% of its
design strength is:
A) 1 day
B) 3 days
C) 7 days
D) 28 days
Answer: C
Explanation: At 7 days, concrete achieves about 65–70% of its design strength.
7. What is the main purpose of control joints in a concrete slab?
A) Improve aesthetics
B) Provide reinforcement
C) Control cracking from shrinkage
D) Increase compressive strength
,Answer: C
Explanation: Control joints are placed to manage shrinkage cracks at
predictable locations.
8. Which curing method is best for large concrete slabs in hot Nevada climates?
A) Steam curing
B) Ponding
C) Plastic sheeting
D) Water spraying
Answer: D
Explanation: Continuous water spray prevents rapid evaporation in hot, dry
climates.
9. How deep should control joints be cut in a 4-inch thick slab?
A) 1/2 inch
B) 1 inch
C) 2 inches
D) Full depth
Answer: B
Explanation: Joints should be one-quarter the slab thickness (1 inch for 4-inch
slab).
10. When pouring concrete in temperatures above 90°F, which precaution is
MOST important?
A) Use warm water in the mix
B) Reduce cement content
C) Place and finish quickly, with curing
D) Delay finishing until next day
Answer: C
Explanation: High heat accelerates setting—placement, finishing, and curing
must be done quickly.
, 11. The Nevada State Contractors Board (NSCB) regulates contractor licenses
under which Nevada Revised Statutes (NRS)?
A) NRS 455
B) NRS 624
C) NRS 278
D) NRS 463
Answer: B
Explanation: NRS 624 governs contractor licensing in Nevada.
12. A vapor barrier under a concrete slab is typically made of:
A) Polyethylene sheet
B) Asphalt felt
C) Fiberglass insulation
D) Geotextile fabric
Answer: A
Explanation: Polyethylene plastic sheeting (6-mil minimum) is used as a vapor
barrier.
13. What is the minimum concrete cover for rebar in a footing cast against
earth?
A) 1 inch
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C
Explanation: ACI requires 3 inches of cover when rebar is cast against soil.
14. What is the water-cement ratio that provides the best balance of strength and
durability?
A) 0.25
B) 0.40
C) 0.50
D) 0.70
construction?
A) Type I Portland Cement
B) Type II Portland Cement
C) Type III High Early Strength Cement
D) Type V Sulfate Resistant Cement
Answer: A
Explanation: Type I is general-purpose Portland cement, used in most
residential and commercial slabs and structures.
2. The minimum concrete compressive strength for a slab-on-grade in a
residential driveway is typically:
A) 2000 psi
B) 2500 psi
C) 3000 psi
D) 4000 psi
Answer: C
Explanation: A 3000 psi mix is standard for driveways due to vehicle load
requirements.
3. What is the maximum allowable slump for concrete used in foundations, per
ACI recommendations?
A) 2 inches
B) 4 inches
C) 6 inches
D) 8 inches
Answer: B
Explanation: Slump of 3–4 inches is common for foundation concrete to
balance workability and strength.
,4. Which test measures the air content of fresh concrete?
A) Slump test
B) Kelly Ball test
C) Pressure meter test
D) Schmidt hammer test
Answer: C
Explanation: The pressure meter (Type B) is used to measure air entrainment in
fresh concrete.
5. In Nevada, reinforcing steel bars must meet which ASTM standard?
A) ASTM A36
B) ASTM A615
C) ASTM A706
D) ASTM C150
Answer: B
Explanation: ASTM A615 covers deformed and plain carbon-steel rebars used
in concrete.
6. The curing time required for concrete to reach approximately 70% of its
design strength is:
A) 1 day
B) 3 days
C) 7 days
D) 28 days
Answer: C
Explanation: At 7 days, concrete achieves about 65–70% of its design strength.
7. What is the main purpose of control joints in a concrete slab?
A) Improve aesthetics
B) Provide reinforcement
C) Control cracking from shrinkage
D) Increase compressive strength
,Answer: C
Explanation: Control joints are placed to manage shrinkage cracks at
predictable locations.
8. Which curing method is best for large concrete slabs in hot Nevada climates?
A) Steam curing
B) Ponding
C) Plastic sheeting
D) Water spraying
Answer: D
Explanation: Continuous water spray prevents rapid evaporation in hot, dry
climates.
9. How deep should control joints be cut in a 4-inch thick slab?
A) 1/2 inch
B) 1 inch
C) 2 inches
D) Full depth
Answer: B
Explanation: Joints should be one-quarter the slab thickness (1 inch for 4-inch
slab).
10. When pouring concrete in temperatures above 90°F, which precaution is
MOST important?
A) Use warm water in the mix
B) Reduce cement content
C) Place and finish quickly, with curing
D) Delay finishing until next day
Answer: C
Explanation: High heat accelerates setting—placement, finishing, and curing
must be done quickly.
, 11. The Nevada State Contractors Board (NSCB) regulates contractor licenses
under which Nevada Revised Statutes (NRS)?
A) NRS 455
B) NRS 624
C) NRS 278
D) NRS 463
Answer: B
Explanation: NRS 624 governs contractor licensing in Nevada.
12. A vapor barrier under a concrete slab is typically made of:
A) Polyethylene sheet
B) Asphalt felt
C) Fiberglass insulation
D) Geotextile fabric
Answer: A
Explanation: Polyethylene plastic sheeting (6-mil minimum) is used as a vapor
barrier.
13. What is the minimum concrete cover for rebar in a footing cast against
earth?
A) 1 inch
B) 2 inches
C) 3 inches
D) 4 inches
Answer: C
Explanation: ACI requires 3 inches of cover when rebar is cast against soil.
14. What is the water-cement ratio that provides the best balance of strength and
durability?
A) 0.25
B) 0.40
C) 0.50
D) 0.70
