Questions And Correct Answer with Rational
(100% verified answer) Q & A 2026 /Instant
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1. What is the primary purpose of a crane load chart?
A. To estimate fuel consumption
B. To determine lifting capacity
C. To calculate operator wages
D. To inspect hydraulic systems
Answer: B
Rationale: Load charts define the safe lifting capacity of a crane under specific
conditions.
2. Which device prevents crane overload?
A. Torque limiter
B. Load moment indicator
C. Fuel gauge
D. Tachometer
Answer: B
Rationale: The load moment indicator warns and prevents unsafe lifting beyond
rated capacity.
3. What is the first step before operating a crane?
A. Start lifting loads
B. Perform pre-operation inspection
,C. Increase engine speed
D. Extend boom fully
Answer: B
Rationale: Pre-operation inspection ensures safety and detects faults before use.
4. Which factor MOST affects crane stability?
A. Paint color
B. Ground conditions
C. Operator clothing
D. Weather radio
Answer: B
Rationale: Uneven or weak ground can cause crane tipping.
5. What is a crane outrigger used for?
A. Increase speed
B. Stabilize crane
C. Store fuel
D. Control steering
Answer: B
Rationale: Outriggers increase stability during lifting operations.
6. Which signal is used to stop all crane operations?
A. Hand raised
B. Arm crossed
C. Both arms extended outward
D. Thumb up
Answer: C
Rationale: Extended arms signal emergency stop in standard crane signaling.
, 7. What should be checked on wire ropes regularly?
A. Color
B. Fraying and broken wires
C. Temperature
D. Length markings
Answer: B
Rationale: Damaged wire ropes reduce lifting safety and may fail.
8. What is the function of a crane boom?
A. Store hydraulic fluid
B. Support and lift loads
C. Control cab temperature
D. Provide fuel supply
Answer: B
Rationale: The boom is the main lifting structure of the crane.
9. Which condition increases risk of crane overturn?
A. Proper load chart use
B. Windy conditions
C. Flat ground
D. Light load
Answer: B
Rationale: Strong winds can destabilize suspended loads.
10. What is the role of a qualified signal person?
A. Operate crane
B. Guide crane movements safely