NCCCO Lattice Boom General Knowledge Exam — 200 Practice Questions with Verified Answers
& Rationales (2026 Q&A)
Table of Contents
| Topic | Questions |
|-------|-----------|
| Topic 1: Crane Components & Nomenclature | 1–25 |
| Topic 2: Wire Rope & Reeving | 26–50 |
| Topic 3: Load Charts & Capacity | 51–80 |
| Topic 4: Crane Stability & Ground Conditions | 81–105 |
| Topic 5: Crane Assembly & Disassembly | 106–125 |
| Topic 6: Safety Devices & Operational Procedures | 126–150 |
| Topic 7: OSHA & ASME Regulations | 151–175 |
| Topic 8: Lift Planning & Critical Lifts | 176–195 |
| Topic 9: Maintenance & Inspection | 196–200 |
Topic 1: Crane Components & Nomenclature (Questions 1–25)
1. The Lattice Boom Crane's primary structural advantage over a telescopic boom of similar
length is:
A) Greater horizontal reach due to reduced deflection
B) Superior lift capacity relative to its own weight
C) Faster erection time on site
,D) Lower manufacturing cost per unit of length
Answer: B
Rationale: The lattice boom's truss-like structure provides an exceptional strength-to-weight
ratio. By distributing loads through axial members rather than bending moments, it achieves
greater rigidity and capacity for a given weight compared to a solid telescopic section.
---
2. Boom length on a lattice boom crane is defined as the distance from:
A) The base of the cab to the boom tip
B) The center of the boom attachment pin to the center of the boom tip sheaves
C) The ground to the boom tip
D) The counterweight to the boom tip
Answer: B
Rationale: Boom length is defined as the distance from the center of the boom attachment pin
(heel pin, foot pin, pivot pin) to the center of the boom tip sheaves.
---
3. What is the definition of "cantilever" of a lattice boom crane?
A) The boom resting on the ground during assembly
B) The boom suspended past the pendant connections
C) The boom fully extended vertically
,D) The boom folded for transport
Answer: B
Rationale: Cantilever refers to the unsupported section of the boom that extends past the
pendant connections.
---
4. The "upper-works" or "superstructure" of a crane refers to:
A) The track or carrier assembly
B) The area of the crane above the turntable including the cab, boom, and counterweight
C) The boom tip section only
D) The wire rope and rigging
Answer: B
Rationale: The superstructure is the area of the crane above the turntable, which includes the
cab, boom, counterweight, and all rotating components.
---
5. What is the main purpose of mid-point suspension pendants on a lattice boom crane?
A) To increase the crane's lifting capacity
B) To support the boom and reduce deflection
C) To provide a mounting point for the hook
D) To house the hoist drums
, Answer: B
Rationale: Mid-point suspension pendants support the boom and reduce deflection, improving
stability and load control.
---
6. The tipping axis of a crawler crane depends on:
A) The length of the boom
B) Whether the idler or sprocket are in line or offset from the track rollers
C) The weight of the load
D) The ground conditions
Answer: B
Rationale: The tipping axis of a crawler crane depends on whether the idler or sprocket are in
line or offset from the track rollers.
---
7. What is the purpose of a gantry or mast on a crane?
A) To support the counterweight
B) To increase the crane's leverage on the boom
C) To provide a mounting point for the hook
D) To house the hoist drums
& Rationales (2026 Q&A)
Table of Contents
| Topic | Questions |
|-------|-----------|
| Topic 1: Crane Components & Nomenclature | 1–25 |
| Topic 2: Wire Rope & Reeving | 26–50 |
| Topic 3: Load Charts & Capacity | 51–80 |
| Topic 4: Crane Stability & Ground Conditions | 81–105 |
| Topic 5: Crane Assembly & Disassembly | 106–125 |
| Topic 6: Safety Devices & Operational Procedures | 126–150 |
| Topic 7: OSHA & ASME Regulations | 151–175 |
| Topic 8: Lift Planning & Critical Lifts | 176–195 |
| Topic 9: Maintenance & Inspection | 196–200 |
Topic 1: Crane Components & Nomenclature (Questions 1–25)
1. The Lattice Boom Crane's primary structural advantage over a telescopic boom of similar
length is:
A) Greater horizontal reach due to reduced deflection
B) Superior lift capacity relative to its own weight
C) Faster erection time on site
,D) Lower manufacturing cost per unit of length
Answer: B
Rationale: The lattice boom's truss-like structure provides an exceptional strength-to-weight
ratio. By distributing loads through axial members rather than bending moments, it achieves
greater rigidity and capacity for a given weight compared to a solid telescopic section.
---
2. Boom length on a lattice boom crane is defined as the distance from:
A) The base of the cab to the boom tip
B) The center of the boom attachment pin to the center of the boom tip sheaves
C) The ground to the boom tip
D) The counterweight to the boom tip
Answer: B
Rationale: Boom length is defined as the distance from the center of the boom attachment pin
(heel pin, foot pin, pivot pin) to the center of the boom tip sheaves.
---
3. What is the definition of "cantilever" of a lattice boom crane?
A) The boom resting on the ground during assembly
B) The boom suspended past the pendant connections
C) The boom fully extended vertically
,D) The boom folded for transport
Answer: B
Rationale: Cantilever refers to the unsupported section of the boom that extends past the
pendant connections.
---
4. The "upper-works" or "superstructure" of a crane refers to:
A) The track or carrier assembly
B) The area of the crane above the turntable including the cab, boom, and counterweight
C) The boom tip section only
D) The wire rope and rigging
Answer: B
Rationale: The superstructure is the area of the crane above the turntable, which includes the
cab, boom, counterweight, and all rotating components.
---
5. What is the main purpose of mid-point suspension pendants on a lattice boom crane?
A) To increase the crane's lifting capacity
B) To support the boom and reduce deflection
C) To provide a mounting point for the hook
D) To house the hoist drums
, Answer: B
Rationale: Mid-point suspension pendants support the boom and reduce deflection, improving
stability and load control.
---
6. The tipping axis of a crawler crane depends on:
A) The length of the boom
B) Whether the idler or sprocket are in line or offset from the track rollers
C) The weight of the load
D) The ground conditions
Answer: B
Rationale: The tipping axis of a crawler crane depends on whether the idler or sprocket are in
line or offset from the track rollers.
---
7. What is the purpose of a gantry or mast on a crane?
A) To support the counterweight
B) To increase the crane's leverage on the boom
C) To provide a mounting point for the hook
D) To house the hoist drums
