Operator Exam Questions With Correct
Answers Verified Instant Download Pdf
1. A crane operator notices a small leak in the hydraulic boom cylinder. The correct
action is to:
A) Continue operating but check fluid levels hourly
B) Seal the leak with epoxy as a temporary fix
C) Tag the crane out of service and report the leak for repair
D) Reduce load capacity by 25% and proceed
Answer: C – Hydraulic leaks can lead to sudden loss of pressure and boom drop.
OSHA and CT regulations require taking the crane out of service until properly
repaired.
2. The maximum wind speed for operating a tower crane with a luffing jib, per
typical manufacturer limits, is:
A) 15 mph
B) 25 mph
C) 40 mph
D) No limit if loads are under 50% capacity
Answer: B – Most tower crane manufacturer specs limit luffing jib operation to
25 mph (approx. 11 m/s) due to increased side forces. CT adopts ANSI/ASME B30
standards.
3. When using a hydraulic truck crane with outriggers fully extended, the operator
must ensure:
A) Outrigger floats are on cribbing only on asphalt
B) Outrigger beams are locked and pads bear evenly on firm ground
C) Tires remain fully inflated to support load
D) Outriggers are partially retracted to reduce tipping moment
Answer: B – Locked beams prevent retraction, and even bearing on firm ground
, prevents punch-through. CT law requires outriggers on adequate supporting
surfaces.
4. A load chart for a crawler crane shows a lift capacity of 25,000 lbs at a 50-foot
radius with 100 feet of boom. If actual radius is 55 feet, capacity:
A) Increases slightly due to longer boom
B) Remains the same if within 10%
C) Decreases; always consult the chart for exact radius
D) Is not affected if crane level
Answer: C – Load charts are radius-specific. At larger radius, capacity almost
always decreases due to reduced stability and structural limits.
5. The term "duty cycle" in hoisting operations refers to:
A) The ratio of lift time to idle time in an 8-hour shift
B) Repeated lifting of heavy loads with specialized attachments like clamshells
C) The number of daily pre-start inspections
D) The time to fully extend the boom
Answer: B – Duty cycle operation involves repetitive lifts using attachments such
as magnets, clamshell buckets, or grapple. CT regulations require additional wear
inspection for such use.
6. A signal person gives a "dog everything" hand signal. The operator should:
A) Increase speed to complete the lift quickly
B) Immediately stop all crane movements
C) Slowly lower the load to the ground
D) Wait for voice confirmation
Answer: B – "Dog everything" is an emergency stop command. All crane motions
must cease until further signals are given, as per ANSI/ASME B30 hand signal
standards.
7. Before rotating the upper structure of a lattice boom crawler crane, the operator
must:
A) Always fully retract the boom
B) Ensure swing radius is clear of personnel and obstructions
, C) Lower the load to the ground
D) Engage the anti-two-block device
Answer: B – The swing radius is a crushing hazard. CT law requires barricades or
warning systems and visual check by operator or spotter.
8. Rated capacity for a crane on outriggers is based on:
A) Tires supporting partial weight
B) Crane being perfectly level within 1% of grade
C) Wind speed below 10 mph
D) Boom angle above 60 degrees
Answer: B – Load charts assume level condition (within 1% grade). Side slope
reduces stability; CT requires cribbing and leveling before lift.
9. An operator finds the anti-two-block warning light is not working during pre-
start inspection. What must be done?
A) Operate carefully, avoiding two-blocking by eye
B) Disable the alarm and use a spotter
C) Tag crane defective and do not operate
D) Reduce maximum hook height by 5 feet
Answer: C – Anti-two-block devices are critical safety systems. CT regulations
(RCSA 31-382) require them operational; failure mandates out-of-service tagging.
10. When lifting a concrete bucket, the operator should position the load line directly
over:
A) The bucket's rear edge
B) The bucket's center of gravity
C) The nearest corner for stability
D) The handle only
Answer: B – Centering the load line over the center of gravity prevents swinging
and reduces stress on rigging. CT exam stresses COG awareness.
11. Which of the following loads requires a critical lift plan?
A) Any load over 50% of capacity
B) Loads requiring two cranes
, C) Loads less than 10,000 lbs
D) All lifts on Friday afternoons
Answer: B – Multiple crane lifts are critical lifts due to load sharing and complex
rigging. CT OSHA requires written plan and qualified rigger for tandem lifts.
12. A crane's boom angle indicator shows 30 degrees, but the actual measured angle
is 28 degrees. This means:
A) Indicator is accurate enough for all lifts
B) Load chart based on 30 degrees may be invalid by up to 15% capacity
C) No action needed if load is under 90% capacity
D) Retract boom to correct angle
Answer: B – A 2-degree error can significantly reduce capacity at longer radii. CT
requires calibrated boom angle indicators checked daily.
13. When operating near overhead power lines rated 50 kV, the minimum clearance
required by CT OSHA (adopted from federal) is:
A) 2 feet
B) 5 feet
C) 10 feet
D) 15 feet
Answer: C – For lines 50 kV or below, minimum clearance is 10 feet. CT adopts 29
CFR 1926.1408. Higher voltages require greater distances.
14. The purpose of a load moment indicator (LMI) is to:
A) Measure the weight of the load
B) Warn when crane approaches overturning or structural limit
C) Automatically level the crane
D) Record total tonnage lifted per shift
Answer: B – LMI monitors boom angle, radius, load weight, and warns or cuts off
before exceeding rated capacity. Required on most cranes in CT.
15. If a crane is set up on frozen ground and temperatures rise above freezing, the
operator should:
A) Ignore, as frost is still solid