EICA MOBILE CRANE & DIGGER DERRICK
Study Guide Comprehensive Resource To Help You Ace
2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. If not overloaded, the ground bearing pressure of a single outrigger pad can
approach a weight equal to which of the following?
A. 50% of crane weight and 50% of suspended load
B. 75% of crane weight and 75% of suspended load
C. 85% of the weight of the crane and 100% of the suspended load
D. 100% of crane weight only
Correct Answer: C. 85% of the weight of the crane and 100% of the
suspended load
2. If you move a crawler crane from soft ground to harder ground, the ground
bearing pressure will:
A. Decrease
B. Stay the same
C. Increase
D. Be eliminated
Correct Answer: C. Increase
3. On a crawler crane, ground bearing pressure is greatest when hoisting:
A. Over the side
B. Over the front
C. Over the rear
D. Over the corner
Correct Answer: D. Over the corner
4. An outrigger pad has 45,000 pounds applied and measures 2 ft × 2 ft. How
many PSI are applied to the ground?
, A. 45 PSI
B. 56 PSI
C. 78 PSI
D. 112 PSI
Correct Answer: C. 78 PSI
5. How much area is required for 45,000 pounds to create only 20 PSI?
A. 1,250 square inches
B. 2,250 square inches
C. 3,500 square inches
D. 4,000 square inches
Correct Answer: B. 2,250 square inches
6. Why are mats or cribbing used during crane setup?
A. Increase crane speed
B. Reduce ground bearing pressure
C. Increase lifting capacity
D. Improve swing radius
Correct Answer: B. Reduce ground bearing pressure
7. What is the purpose of placing blocking or pads under outrigger floats?
A. Increase boom height
B. Stabilize counterweight
C. Distribute the force over a larger area
D. Reduce load weight
Correct Answer: C. Distribute the force over a larger area
8. While swinging a heavy load over an outrigger, that outrigger must be able
to support:
A. 50% crane weight only
B. 75% crane weight and 50% load
C. 85% crane weight and 100% load weight
D. 100% crane weight only
Correct Answer: C. 85% crane weight and 100% load weight
,9. What is the first action before traveling under a low pipe rack or
obstruction?
A. Lower the boom
B. Increase speed
C. Post a signalperson to check clearances
D. Swing counterweight outward
Correct Answer: C. Post a signalperson to check clearances
10.According to OSHA, when traveling under energized power lines over 750
kV, the minimum clearance is:
A. 10 ft
B. 15 ft
C. 20 ft
D. 45 ft
Correct Answer: C. 20 ft
11.When passing under 50 kV power lines with a crane in transit, OSHA
minimum clearance is:
A. 4 ft
B. 6 ft
C. 10 ft
D. 20 ft
Correct Answer: B. 6 ft
12.When setting up near a ditch or excavation, the crane should be positioned
at least:
A. Half the depth away
B. Equal to the depth away
C. 1½ times the depth of the excavation
D. Two times the depth
Correct Answer: C. 1½ times the depth of the excavation
13.When working near a cellar wall, outrigger pads should be placed:
A. Directly beside the wall
, B. Half the wall depth away
C. At least as far back as the depth of the wall below ground
D. On top of the wall footing
Correct Answer: C. At least as far back as the depth of the wall below
ground
14.According to OSHA, who is responsible for ensuring proper ground
conditions for a mobile crane?
A. Operator
B. Signalperson
C. The controlling entity
D. Rigger
Correct Answer: C. The controlling entity
15.Which of the following is NOT a good location for crane setup?
A. Compacted soil
B. Level gravel surface
C. Above utilities
D. Crane mat surface
Correct Answer: C. Above utilities
16.When underground utilities may be present, the best procedure is to:
A. Proceed carefully
B. Reduce load weight
C. Contact local utility company
D. Use smaller crane
Correct Answer: C. Contact local utility company
17.During shift inspection, water accumulation around an outrigger must be:
A. Ignored
B. Covered
C. Drained
D. Measured
Correct Answer: C. Drained
Study Guide Comprehensive Resource To Help You Ace
2026-2027 Exams Includes Frequently Tested Questions
With ELABORATED 100% Correct COMPLETE SOLUTIONS
Guaranteed Pass First Attempt!! Current Update!!
1. If not overloaded, the ground bearing pressure of a single outrigger pad can
approach a weight equal to which of the following?
A. 50% of crane weight and 50% of suspended load
B. 75% of crane weight and 75% of suspended load
C. 85% of the weight of the crane and 100% of the suspended load
D. 100% of crane weight only
Correct Answer: C. 85% of the weight of the crane and 100% of the
suspended load
2. If you move a crawler crane from soft ground to harder ground, the ground
bearing pressure will:
A. Decrease
B. Stay the same
C. Increase
D. Be eliminated
Correct Answer: C. Increase
3. On a crawler crane, ground bearing pressure is greatest when hoisting:
A. Over the side
B. Over the front
C. Over the rear
D. Over the corner
Correct Answer: D. Over the corner
4. An outrigger pad has 45,000 pounds applied and measures 2 ft × 2 ft. How
many PSI are applied to the ground?
, A. 45 PSI
B. 56 PSI
C. 78 PSI
D. 112 PSI
Correct Answer: C. 78 PSI
5. How much area is required for 45,000 pounds to create only 20 PSI?
A. 1,250 square inches
B. 2,250 square inches
C. 3,500 square inches
D. 4,000 square inches
Correct Answer: B. 2,250 square inches
6. Why are mats or cribbing used during crane setup?
A. Increase crane speed
B. Reduce ground bearing pressure
C. Increase lifting capacity
D. Improve swing radius
Correct Answer: B. Reduce ground bearing pressure
7. What is the purpose of placing blocking or pads under outrigger floats?
A. Increase boom height
B. Stabilize counterweight
C. Distribute the force over a larger area
D. Reduce load weight
Correct Answer: C. Distribute the force over a larger area
8. While swinging a heavy load over an outrigger, that outrigger must be able
to support:
A. 50% crane weight only
B. 75% crane weight and 50% load
C. 85% crane weight and 100% load weight
D. 100% crane weight only
Correct Answer: C. 85% crane weight and 100% load weight
,9. What is the first action before traveling under a low pipe rack or
obstruction?
A. Lower the boom
B. Increase speed
C. Post a signalperson to check clearances
D. Swing counterweight outward
Correct Answer: C. Post a signalperson to check clearances
10.According to OSHA, when traveling under energized power lines over 750
kV, the minimum clearance is:
A. 10 ft
B. 15 ft
C. 20 ft
D. 45 ft
Correct Answer: C. 20 ft
11.When passing under 50 kV power lines with a crane in transit, OSHA
minimum clearance is:
A. 4 ft
B. 6 ft
C. 10 ft
D. 20 ft
Correct Answer: B. 6 ft
12.When setting up near a ditch or excavation, the crane should be positioned
at least:
A. Half the depth away
B. Equal to the depth away
C. 1½ times the depth of the excavation
D. Two times the depth
Correct Answer: C. 1½ times the depth of the excavation
13.When working near a cellar wall, outrigger pads should be placed:
A. Directly beside the wall
, B. Half the wall depth away
C. At least as far back as the depth of the wall below ground
D. On top of the wall footing
Correct Answer: C. At least as far back as the depth of the wall below
ground
14.According to OSHA, who is responsible for ensuring proper ground
conditions for a mobile crane?
A. Operator
B. Signalperson
C. The controlling entity
D. Rigger
Correct Answer: C. The controlling entity
15.Which of the following is NOT a good location for crane setup?
A. Compacted soil
B. Level gravel surface
C. Above utilities
D. Crane mat surface
Correct Answer: C. Above utilities
16.When underground utilities may be present, the best procedure is to:
A. Proceed carefully
B. Reduce load weight
C. Contact local utility company
D. Use smaller crane
Correct Answer: C. Contact local utility company
17.During shift inspection, water accumulation around an outrigger must be:
A. Ignored
B. Covered
C. Drained
D. Measured
Correct Answer: C. Drained
