Examination Practice Questions And
Correct Answers (Verified Answers) Plus
Rationales 2025|2026 Q&A | Instant
Download Pdf
1. What is the primary purpose of a crane’s load chart?
A) To show the operator how to operate the controls
B) To determine the lifting capacity at various boom lengths and
angles
C) To measure wind speed limits
D) To provide safety inspection schedules
B) To determine the lifting capacity at various boom lengths and angles
Rationale: The load chart provides the crane’s rated capacity based on
boom length, radius, and configuration, which is essential for safe lifting.
, 2. Which type of crane is best suited for lifting heavy loads in confined
spaces?
A) Tower crane
B) Mobile crane
C) Crawler crane
D) Overhead bridge crane
B) Mobile crane
Rationale: Mobile cranes are versatile, can be maneuvered into tight
spaces, and are often used for urban construction.
3. When operating a crane, which factor most affects the maximum
lifting capacity?
A) Operator experience
B) Boom length and angle
C) Number of riggers present
D) Type of load
B) Boom length and angle
Rationale: The lifting capacity decreases as the boom length increases or
the boom angle decreases, according to the load chart.
4. Which safety device prevents the crane from lifting loads beyond its
rated capacity?
A) Load moment indicator (LMI)
B) Hoist brake
, C) Anti-two block system
D) Outrigger
A) Load moment indicator (LMI)
Rationale: The LMI monitors load weight and boom position to prevent
overloads.
5. How often should a crane be inspected according to OSHA
regulations?
A) Daily visual inspection
B) Monthly operational inspection
C) Annually only
D) Weekly inspection
A) Daily visual inspection
Rationale: OSHA requires a daily pre-operation inspection to identify
hazards or defects before use.
6. What is the purpose of outriggers on a mobile crane?
A) To lift heavier loads
B) To stabilize the crane during lifting operations
C) To extend the crane’s boom
D) To measure load weight
B) To stabilize the crane during lifting operations
Rationale: Outriggers extend the base of the crane, increasing stability and
preventing tipping.
, 7. Which signal is used to stop crane operations immediately?
A) One short blast of a whistle
B) Two short blasts
C) One long blast
D) Three short blasts
C) One long blast
Rationale: Standard hand or whistle signals designate one long blast as the
emergency stop signal.
8. What does the term "radius" refer to in crane operations?
A) The distance from the crane base to the load
B) The diameter of the crane’s wheels
C) The length of the boom
D) The load weight
A) The distance from the crane base to the load
Rationale: The radius affects the crane’s lifting capacity; the farther the
load, the lower the capacity.
9. Which condition requires the crane to stop lifting immediately?
A) Slight wind
B) Load swinging uncontrollably
C) Operator sees the load clearly
D) Load is painted