100+ Free NCCCO Concrete Pump (CPO) Practice Questions

Pass your NCCCO CCO Concrete Pump Operator (CPO) exam on the first try — instant access, no signup required.

✓ No registration✓ No credit card✓ No hidden fees✓ Start practicing immediately

Not publicly disclosed Pass Rate

100+ Questions

100% Free

1 / 100

Question 1

Score: 0/0

Which type of concrete pump uses an articulating boom mounted on a truck to deliver concrete directly to the placement point?

Pneumatic placer

Truck-mounted boom pump

Separate placing boom

Trailer-mounted line pump

to track

Same family resources

Explore More NCCCO Crane Operator Certifications

Continue into nearby exams from the same family. Each card keeps practice questions, study guides, flashcards, videos, and articles in one place.

NCCCO Mobile Crane

Practice Questions200 questions Cheat Sheet

1 blog

NCCCO Articulating Crane Operator

Practice Questions100 questions

More From This Family

Videos and articles for deeper review.

ArticleFREE NCCCO Mobile Crane Operator Exam Guide 2026: Core + Specialty Written, Practical Stations, Load Chart Math (Practice Questions)24 min read ArticleFREE NCCCO Tower Crane Exam Guide 2026: Pass Written & Practical14 min read ArticleNCCCO Rigger Exam Guide 2026: Level I Written, Practical Tasks, Fees, Domains, and Free Practice12 min read

2026 Statistics

Key Facts: NCCCO Concrete Pump (CPO) Exam

Written Exam Questions

NCCCO CPO handbook (06/2024)

90 min

Written Time Limit

NCCCO CPO handbook

75%

Standard NCCCO Passing Score

NCCCO core written benchmark

2024

Practical Exam Added

NCCCO CPO program update

10 ft

MAD Up to 50 kV

OSHA 1926.1408 Table A

1/3

Max Aggregate vs Line ID

ACI 304.2R guidance

As of May 13, 2026, NCCCO's CCO Concrete Pump Operator (CPO) program uses an 80-question multiple-choice written exam delivered through NCCCO-accredited testing in 90 minutes, paired with a separate practical skills exam that NCCCO added in 2024. The standard NCCCO core written passing benchmark is 75 percent. CPO is independent of the American Concrete Pumping Association (ACPA) certification program; ACPA continues to run its own concrete pump operator certification. Operators preparing for 2026 testing should also study OSHA 29 CFR 1926.1408 power-line clearances and ACI 304.2R pumping practices.

Sample NCCCO Concrete Pump (CPO) Practice Questions

Try these sample questions to test your NCCCO Concrete Pump (CPO) exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which type of concrete pump uses an articulating boom mounted on a truck to deliver concrete directly to the placement point?

A.Trailer-mounted line pump

B.Truck-mounted boom pump

C.Separate placing boom

D.Pneumatic placer

Explanation: A truck-mounted boom pump combines the pump and a hydraulically articulating placing boom on a single chassis, allowing the operator to deliver concrete through the pipeline running along the boom directly to the form. Trailer-mounted line pumps, by contrast, push concrete through flexible hose only.

2On a typical double-piston concrete pump, what is the primary purpose of the S-valve (rock valve)?

A.Filters aggregate larger than the line ID

B.Switches the discharge path between the two material cylinders so flow stays directed into the delivery line

C.Increases concrete slump just before discharge

D.Vents trapped air from the hopper

Explanation: The S-valve (also called a rock valve) is the swing tube that alternately couples each material cylinder to the delivery line. While one differential cylinder pushes concrete out, the S-valve seals off the other so the retracting cylinder can draw a fresh charge from the hopper.

3A line pump that is towed to the jobsite and uses only flexible hose for placement is best described as a:

A.Boom pump

B.Separate placing boom

C.Trailer-mounted (stationary) pump

D.Truck mixer

Explanation: Trailer-mounted, sometimes called stationary or line, pumps are towed to the site and discharge through pipe and flexible hose laid by the crew. They are common on slabs-on-grade and tight residential pours where a boom pump cannot reach or is unnecessary.

4A separate placing boom is best described as:

A.A boom permanently welded to a truck-mounted pump

B.A free-standing or tower-mounted placing boom fed by a separate stationary pump through a riser pipeline

C.A trailer pump that includes a small folding boom

D.A boom dedicated to lifting hose rather than placing concrete

Explanation: Separate placing booms are mounted on a base, tower, or building floor and fed by a remote stationary pump through a riser line. They are common on high-rise and large-footprint pours where a truck-mounted boom cannot stay set up.

5What component sits between the truck mixer and the pumping cylinders and is agitated to keep concrete homogeneous before it enters the pump?

A.Slickline

B.Hopper

C.Reducer

D.End hose

Explanation: The hopper receives concrete from the truck mixer and contains the agitator/remixer that prevents segregation while feeding the pumping cylinders. A clean, properly charged hopper is critical to consistent pumping and to keeping the S-valve free of obstructions.

6The differential cylinders on a piston concrete pump are powered by:

A.Pneumatic pressure

B.Hydraulic oil pressure

C.Steam pressure

D.Mechanical chain drive

Explanation: Modern piston concrete pumps drive the material cylinders with high-pressure hydraulic oil acting on differential (drive) cylinders. The hydraulic system, not pneumatic or mechanical drive, is what produces the line pressure that pushes concrete down the slickline.

7The rigid steel pipe that runs along a boom from the hopper to the end hose is commonly called the:

A.Sponge ball

B.Slickline (delivery line)

C.Slump tube

D.Reducer

Explanation: The slickline, or delivery line, is the rigid steel pipeline along the boom that carries concrete from the hopper outlet to the end hose. Its inside diameter, wear thickness, and clamp condition all affect pumping pressure and safety.

8Which manufacturer is most associated with German-engineered truck-mounted boom pumps using S-valve systems?

A.Schwing and Putzmeister

B.Caterpillar and John Deere

C.Kenworth and Peterbilt

D.Hitachi and Komatsu

Explanation: Schwing and Putzmeister are the two best-known German manufacturers of boom pumps, and their S-valve (rock valve) designs dominate the North American boom-pump fleet. Knowing the brand and the operating principle helps when reading manufacturer documentation in the field.

9A reducer in a concrete pump delivery line is used to:

A.Transition between two different pipe diameters

B.Drop concrete temperature

C.Increase concrete slump

D.Connect the boom to the hopper agitator

Explanation: A reducer is a tapered pipe section that lets the crew step from a larger-diameter line to a smaller one. Reducers raise pumping pressure, so operators only step down where it is necessary for placement geometry and where pressure ratings of downstream components are adequate.

10The flexible rubber hose attached to the discharge end of the boom is generally called the:

A.End hose (whip hose)

B.Suction hose

C.Sponge tube

D.Wash-down line

Explanation: The flexible end hose, sometimes called a whip hose, hangs from the last boom section so placement crew can direct concrete into forms. Because it can move violently during blowouts and at startup, hose handling and exclusion-zone discipline are core safety topics.

About the NCCCO Concrete Pump (CPO) Exam

The NCCCO Concrete Pump Operator (CPO) certification covers safe operation of truck-mounted boom pumps, trailer-mounted (line) pumps, and separate placing booms. Topics span pre-trip planning, driving the pump truck, setting up the unit on the jobsite, conducting placement operations, preparing the pump for travel, and end-of-day operations. NCCCO added a practical skills exam to the CPO credential in 2024, so candidates now pass both a written and a practical exam to earn the CCO Concrete Pump Operator designation. ACPA also runs a separate concrete pump operator certification program; the two credentials are independent of each other.

Assessment

80 multiple-choice written exam in 90 minutes covering six domains (pre-trip planning, driving the truck, setting up the pump, placement operations, preparing the pump for travel, end-of-day operations), plus a separate practical skills exam added by NCCCO in 2024.

Time Limit

90 minutes written

Passing Score

75% Core (standard NCCCO)

Exam Fee

Approximately $130 written + $135 practical at NCCCO member rates (NCCCO / NCCCO-accredited test sites and proctors)

NCCCO Concrete Pump (CPO) Exam Content Outline

Domain 1

Pre-Trip Planning

Job spec review, mix design awareness, site access planning, hazard identification, ground-condition assessment, and pre-operational equipment inspection before leaving the yard.

Domain 2

Driving the Truck

Safe road operation of the pump truck, route planning around overhead and weight limits, and arrival positioning at the jobsite.

Domain 3

Setting Up the Pump

Outrigger deployment, ground bearing and cribbing, level setup, OSHA Table A minimum approach distances, exclusion zones, and safe boom unfolding.

Domain 4

Conducting Placement Operations

Priming, pumping pressure control, boom positioning, end-hose handling, ACI 304.2R mix considerations (slump, max aggregate 1/3 line ID, admixtures), communication with placement crew, and emergency response.

Domain 5

Preparing the Pump for Travel

Line clean-out with sponge ball, water, or controlled air; blowback control; boom stow sequence; and outrigger retraction.

Domain 6

End-of-Day Operations

Hopper and S-valve wash-out, wear-part inspection, hydraulic-system checks, wash-water containment, and documentation.

How to Pass the NCCCO Concrete Pump (CPO) Exam

What You Need to Know

Passing score: 75% Core (standard NCCCO)
Assessment: 80 multiple-choice written exam in 90 minutes covering six domains (pre-trip planning, driving the truck, setting up the pump, placement operations, preparing the pump for travel, end-of-day operations), plus a separate practical skills exam added by NCCCO in 2024.
Time limit: 90 minutes written
Exam fee: Approximately $130 written + $135 practical at NCCCO member rates

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

NCCCO Concrete Pump (CPO) Study Tips from Top Performers

1Treat OSHA 1926.1408 Table A as memorization: 10 feet up to 50 kV, 15 feet up to 200 kV, 20 feet up to 350 kV, 25 feet up to 500 kV.

2Internalize the ACI 304.2R rules of thumb: typical pumping slump 4 to 6 inches, max aggregate roughly 1/3 the smallest line inside diameter, do not add water to fix pumpability.

3Always think outrigger reactions: the outrigger closest to the boom's extended position carries the highest reaction; size pads for that worst case.

4Know the S-valve (rock valve), differential cylinders, hopper agitator, and wear ring/plate as a system, not as isolated parts.

5When line pressure spikes, your first move is to slow or stop and investigate, not to push harder.

6Practice the line-burst and electrical-contact procedures until they are automatic; both are common exam scenarios and real-world fatal hazards.

7Drill the difference between full-deployment and short-jacked outrigger envelopes; never operate outside the manufacturer's reduced envelope when short-jacked.

8For clean-out, expect questions on sponge ball capture devices, controlled blowback, and locking out the pump before any contact with the hopper or S-valve.

Frequently Asked Questions

How many questions are on the NCCCO Concrete Pump Operator (CPO) written exam?

The current NCCCO Concrete Pump Operator written exam has 80 multiple-choice questions and a 90-minute time limit. The exam covers six domains: pre-trip planning, driving the truck, setting up the pump, placement operations, preparing the pump for travel, and end-of-day operations.

Does NCCCO CPO require a practical exam?

Yes. NCCCO added a Concrete Pump Operator practical exam to the CPO program in 2024. To earn the CCO Concrete Pump Operator certification, candidates pass both the 80-question written exam and the hands-on practical exam at an NCCCO-accredited test site.

What passing score is required?

NCCCO core written exams use a 75 percent passing benchmark as the standard NCCCO threshold. The practical exam is graded on a pass/fail basis using NCCCO's task-based scoring rubric.

What does the CPO exam cost?

At NCCCO member rates, the written exam runs approximately $130 and the practical exam runs approximately $135, for roughly $265 for both. Non-member rates are higher. Always check NCCCO's current fees page for the exact pricing.

How is NCCCO CPO different from ACPA certification?

NCCCO's CCO Concrete Pump Operator (CPO) and the American Concrete Pumping Association (ACPA) concrete pump operator certification are two independent credentials. Both exist, and operators may hold one or both depending on their employer, contracts, and jurisdiction. NCCCO writes the CPO exam and ACPA writes its own.

What standards should I study for CPO in 2026?

Read OSHA 29 CFR 1926 Subpart CC for power-line clearance (1926.1408 Table A) and ground-condition rules. Study ACI 304.2R Guide to Placing Concrete by Pumping Methods for slump, pumpability, max aggregate size of about 1/3 the smallest line inside diameter, admixtures, and trial-mix concepts. Pair these with the current NCCCO Concrete Pump Operator candidate handbook.

How long is NCCCO Concrete Pump Operator certification valid?

NCCCO concrete pump operator certification follows the standard NCCCO 5-year certification cycle. Recertification must be completed during the 12 months before expiration following NCCCO's published rules.