CM 2500 Exam 2 - Part 2 (Problems) Actual Exam
2026/2027: Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed –
A+ Graded
TABLE OF CONTENTS
Section 1 | Construction Materials and Testing | Q1 – Q10
Section 2 | Soils and Foundation Analysis | Q11 – Q20
Section 3 | Concrete and Reinforced Concrete Design | Q21 – Q30
Section 4 | Steel and Wood Construction | Q31 – Q40
Section 5 | Quantity Takeoff and Cost Estimation Problems | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: CONSTRUCTION MATERIALS AND TESTING Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 38-year-old materials engineer at a commercial concrete batch plant in Phoenix is
reviewing test results for a new 4,000 psi mix design. The 7-day compressive strength
averages 2,850 psi, and the 28-day cylinders show 4,200 psi. The ambient temperature
during curing ranged from 105°F to 112°F. The engineer is concerned about long-term
durability. The most appropriate next step is to:
A. Accept the mix since the 28-day strength exceeds the specified 4,000 psi
requirement.
B. Evaluate the potential for delayed ettringite formation and request additional 56-day
strength data. ✓ CORRECT
C. Reduce the cement content by 8% to lower the heat of hydration for future batches.
D. Increase the water-cement ratio to improve workability and reduce thermal cracking
risk.
,Correct Answer: B
Rationale: High curing temperatures accelerate early strength gain but can promote
delayed ettringite formation, which causes internal expansion and cracking years later.
The 28-day strength looks acceptable, but durability concerns in hot climates require
longer-term data and sulfate stability evaluation. Reducing cement content without
testing compromises the designed strength, and increasing the water-cement ratio
directly undermines both strength and durability.
Question 2 of 50
A 45-year-old field technician is conducting a slump test on a 6-sack concrete mix for a
warehouse slab in Denver at 28°F ambient temperature. The measured slump is 1.5
inches, and the air content is 3.2%. The specification requires 4-inch slump and 5% to
7% air for freeze-thaw exposure. The batch ticket shows a water reducer was added at
the plant but no air-entraining agent. The technician should:
A. Add water at the site to bring the slump up to 4 inches before placing the concrete.
B. Reject the load and require the batch plant to add air-entraining admixture and retest.
✓ CORRECT
C. Place the concrete as-is since the low slump will produce higher strength in cold
weather.
D. Add calcium chloride accelerator to compensate for the low air content in freezing
conditions.
Correct Answer: B
Rationale: Concrete placed in freeze-thaw environments without adequate air
entrainment will suffer scaling and deterioration regardless of strength, and site water
addition violates the specified water-cement ratio. The batch plant must correct the mix
design before delivery. Placing low-slump concrete in cold weather creates placement
and consolidation problems, and calcium chloride does not create the micro-air voids
needed for freeze-thaw protection.
,Question 3 of 50
A 33-year-old quality control manager at an asphalt paving project in Texas is reviewing
Marshall stability test results for a Type C surface course. The optimum asphalt content
is 5.2% by weight of mix, but field cores show asphalt contents ranging from 6.1% to
6.8%. The pavement is exhibiting rutting in wheel paths after only 8 months of service.
The most likely cause is:
A. Insufficient compaction effort during initial rolling operations.
B. Excess asphalt binder leading to plastic deformation under traffic loading. ✓
CORRECT
C. Aggregate with excessive flat and elongated particles causing interlock failure.
D. Inadequate prime coat application between the base and surface courses.
Correct Answer: B
Rationale: Asphalt contents significantly above optimum reduce the internal friction of
the aggregate skeleton and create a thick binder film that flows under repeated loading,
which is the classic mechanism for rutting in hot climates. Insufficient compaction
would show density deficiencies, not elevated binder contents. Flat and elongated
particles affect stability but do not explain the correlation between high asphalt content
and rutting, and prime coat issues affect bonding with the base, not surface
deformation.
Question 4 of 50
A 41-year-old project engineer is specifying masonry mortar for a 4-story hotel in a
coastal zone with moderate seismic risk. The structural drawings call for Type S mortar,
but the masonry contractor proposes substituting Type N mortar to save on cement
costs. The project engineer should:
A. Approve the substitution since Type N mortar has adequate compressive strength for
non-load-bearing veneer applications.
, B. Reject the substitution because Type S mortar provides higher flexural bond strength
required for seismic lateral loads. ✓ CORRECT
C. Request a 28-day prism test to verify that Type N mortar meets the compressive
strength of Type S before deciding.
D. Allow the substitution with the condition that horizontal reinforcement spacing be
reduced by 50%.
Correct Answer: B
Rationale: Type S mortar is specified for seismic zones because its higher cement
content and lime proportion produce superior flexural bond strength and ductility, which
are critical for resisting lateral forces in masonry structures. Type N mortar is not an
acceptable substitute in this application regardless of compressive strength
equivalence. Prism testing compressive strength does not capture the bond and
ductility properties that make Type S appropriate for seismic design, and reducing
reinforcement spacing does not compensate for weaker mortar bond.
Question 5 of 50
A 36-year-old testing technician is performing a sieve analysis on fine aggregate for a
concrete mix design per ASTM C117 and C136. The sample mass is 500 grams, and the
results show 8% passing the No. 200 sieve. The specification limits fines content to 3%
for the intended exposure class. The technician notes the aggregate stockpile has been
exposed to recent heavy rain. The most appropriate action is to:
A. Wash the aggregate sample and rerun the sieve analysis to confirm the fines content.
B. Reject the aggregate stockpile and require the supplier to provide material meeting
the 3% limit. ✓ CORRECT
C. Increase the cement content by 10% to compensate for the higher fines and maintain
workability.
D. Use the aggregate as-is since the 8% fines will improve the cohesiveness of the
concrete mix.
Correct Answer: B
2026/2027: Complete Exam-Style Questions with
Detailed Rationales | 100% Verified | Pass Guaranteed –
A+ Graded
TABLE OF CONTENTS
Section 1 | Construction Materials and Testing | Q1 – Q10
Section 2 | Soils and Foundation Analysis | Q11 – Q20
Section 3 | Concrete and Reinforced Concrete Design | Q21 – Q30
Section 4 | Steel and Wood Construction | Q31 – Q40
Section 5 | Quantity Takeoff and Cost Estimation Problems | Q41 – Q50
Instructions: Choose the single best answer. Pass: 80% in 90 minutes.
══════════════════════════════════════
SECTION 1: CONSTRUCTION MATERIALS AND TESTING Q1 – Q10
══════════════════════════════════════
Question 1 of 50
A 38-year-old materials engineer at a commercial concrete batch plant in Phoenix is
reviewing test results for a new 4,000 psi mix design. The 7-day compressive strength
averages 2,850 psi, and the 28-day cylinders show 4,200 psi. The ambient temperature
during curing ranged from 105°F to 112°F. The engineer is concerned about long-term
durability. The most appropriate next step is to:
A. Accept the mix since the 28-day strength exceeds the specified 4,000 psi
requirement.
B. Evaluate the potential for delayed ettringite formation and request additional 56-day
strength data. ✓ CORRECT
C. Reduce the cement content by 8% to lower the heat of hydration for future batches.
D. Increase the water-cement ratio to improve workability and reduce thermal cracking
risk.
,Correct Answer: B
Rationale: High curing temperatures accelerate early strength gain but can promote
delayed ettringite formation, which causes internal expansion and cracking years later.
The 28-day strength looks acceptable, but durability concerns in hot climates require
longer-term data and sulfate stability evaluation. Reducing cement content without
testing compromises the designed strength, and increasing the water-cement ratio
directly undermines both strength and durability.
Question 2 of 50
A 45-year-old field technician is conducting a slump test on a 6-sack concrete mix for a
warehouse slab in Denver at 28°F ambient temperature. The measured slump is 1.5
inches, and the air content is 3.2%. The specification requires 4-inch slump and 5% to
7% air for freeze-thaw exposure. The batch ticket shows a water reducer was added at
the plant but no air-entraining agent. The technician should:
A. Add water at the site to bring the slump up to 4 inches before placing the concrete.
B. Reject the load and require the batch plant to add air-entraining admixture and retest.
✓ CORRECT
C. Place the concrete as-is since the low slump will produce higher strength in cold
weather.
D. Add calcium chloride accelerator to compensate for the low air content in freezing
conditions.
Correct Answer: B
Rationale: Concrete placed in freeze-thaw environments without adequate air
entrainment will suffer scaling and deterioration regardless of strength, and site water
addition violates the specified water-cement ratio. The batch plant must correct the mix
design before delivery. Placing low-slump concrete in cold weather creates placement
and consolidation problems, and calcium chloride does not create the micro-air voids
needed for freeze-thaw protection.
,Question 3 of 50
A 33-year-old quality control manager at an asphalt paving project in Texas is reviewing
Marshall stability test results for a Type C surface course. The optimum asphalt content
is 5.2% by weight of mix, but field cores show asphalt contents ranging from 6.1% to
6.8%. The pavement is exhibiting rutting in wheel paths after only 8 months of service.
The most likely cause is:
A. Insufficient compaction effort during initial rolling operations.
B. Excess asphalt binder leading to plastic deformation under traffic loading. ✓
CORRECT
C. Aggregate with excessive flat and elongated particles causing interlock failure.
D. Inadequate prime coat application between the base and surface courses.
Correct Answer: B
Rationale: Asphalt contents significantly above optimum reduce the internal friction of
the aggregate skeleton and create a thick binder film that flows under repeated loading,
which is the classic mechanism for rutting in hot climates. Insufficient compaction
would show density deficiencies, not elevated binder contents. Flat and elongated
particles affect stability but do not explain the correlation between high asphalt content
and rutting, and prime coat issues affect bonding with the base, not surface
deformation.
Question 4 of 50
A 41-year-old project engineer is specifying masonry mortar for a 4-story hotel in a
coastal zone with moderate seismic risk. The structural drawings call for Type S mortar,
but the masonry contractor proposes substituting Type N mortar to save on cement
costs. The project engineer should:
A. Approve the substitution since Type N mortar has adequate compressive strength for
non-load-bearing veneer applications.
, B. Reject the substitution because Type S mortar provides higher flexural bond strength
required for seismic lateral loads. ✓ CORRECT
C. Request a 28-day prism test to verify that Type N mortar meets the compressive
strength of Type S before deciding.
D. Allow the substitution with the condition that horizontal reinforcement spacing be
reduced by 50%.
Correct Answer: B
Rationale: Type S mortar is specified for seismic zones because its higher cement
content and lime proportion produce superior flexural bond strength and ductility, which
are critical for resisting lateral forces in masonry structures. Type N mortar is not an
acceptable substitute in this application regardless of compressive strength
equivalence. Prism testing compressive strength does not capture the bond and
ductility properties that make Type S appropriate for seismic design, and reducing
reinforcement spacing does not compensate for weaker mortar bond.
Question 5 of 50
A 36-year-old testing technician is performing a sieve analysis on fine aggregate for a
concrete mix design per ASTM C117 and C136. The sample mass is 500 grams, and the
results show 8% passing the No. 200 sieve. The specification limits fines content to 3%
for the intended exposure class. The technician notes the aggregate stockpile has been
exposed to recent heavy rain. The most appropriate action is to:
A. Wash the aggregate sample and rerun the sieve analysis to confirm the fines content.
B. Reject the aggregate stockpile and require the supplier to provide material meeting
the 3% limit. ✓ CORRECT
C. Increase the cement content by 10% to compensate for the higher fines and maintain
workability.
D. Use the aggregate as-is since the 8% fines will improve the cohesiveness of the
concrete mix.
Correct Answer: B
