mobile cranes

Question 1

determine if this statement is true or false. all lifts reqire some type of lift plan.

1. true
2. false

page 2

Answer 1

1. true

page 2

Question 2

determine if this statement is true or false. all lift plans require an engineering staff and site drawing.

1. ture
2. false

Answer 2

2. false

page 2

Question 3

which of the following would be included in a detailed lift plan:
1. size, shape, weight of the load
2. size, type, set-up of crane
3. ste-by-step movements of cranes
4. all of the above

Answer 3

4. all of the above

(1. size, shape, weight of the load
2. size, type, set-up of crane
3. ste-by-step movements of cranes)

page 2

Question 4

Determine If this statement is true or false. A documented pre-lift plan will state the names of the engineers and supervisors who have worked to prepare the plan.

1. true
2. false

Answer 4

1. true

page 2

Question 5

Determine if this statement is true or false. A documented pre-lift plan will state the names of the operator(s) and the riggers who will rig the load and perform the lift.

1. true
2. false

Answer 5

1. true

page 2

Question 6

Determine if this statement Is true or false. As crane signaling is only a basic function and the signal-person knows where the loads will be positioned, training or
testing of the signal-person should not be required.

1. true
2. false

Answer 6

2. false

page 3

Question 7

When using hand signals to direct a crane operator, an extended arm with the thumb vertical and the fingers opening and closing into a fist indicates:
1. lower load
2. raise boom and lower load
3. raise the load line
4. extend boom

Answer 7

2. raise boom and lower load

page 4

Question 8

Two closed fists with both thumbs pointing toward each other is the signal for:
1. retract hydraulic boom
2. lower jib
3. lower load slowly
4. secure load in position

Answer 8

1. retract hydraulic boom

page 4

Question 9

Determine if this statement is true or false. A crane component made by a crane company can be used on any other crane made by that company.
1. true
2. false

Answer 9

2. false

page 6

Question 10

Which type of crane would be best to use where a tight turning radius is required?
1. all-terrain
2. crawler crane
3. carrier-mounted
4. ringer crane

Answer 10

2. crawler crane

page 9

Question 11

To prevent damage, what type of sling should be used to lift a lattice boom?
1. wire rope slings
2. chain slings
3. metal mesh slings
4. synthetic web slings

Answer 11

4. synthetic web slings

page 17

Question 12

When Is the proper time to attach the counterweight to the crane?
1. before load Is lifted
2. prior to Installation of the complete boom
3. after installation of boom
4. only if load weight exceeds crane weight

Answer 12

2. prior to Installation of the complete boom

page 18

Question 13

In order for a crane to lift its own counterweight for loading or off-loading, which of the following criteria should be met to ensure maximum safety?
1. must be on firm level ground
2. gantry must be fully extended
3. four part load line must be used
4. all of the above

Answer 13

4. all of the above

page 18

Question 14

When assembling lattice boom sections, which set of pins are installed first?
1. left side
2. right side
3. both lower
4. both upper

Answer 14

4. both upper

page 20

Question 15

When installing the boom pins, the pin should be pointing:

1. out away from boom center
2. in toward boom center

Answer 15

1. out away from boom center

page 22

Question 16

When dismantllng a lattice boom, which boom pins should be removed first?

1. □ left side
2. right side
3. both lower
4. both upper

Answer 16

3. both lower

page 23

Question 17

Determine If this statement is true or false. It is safe to climb under a boom to knock out the boom pins if the crane has tension on the pendant lines.

1. true
2. false

Answer 17

2. false

page 24

Question 18

Which position should the gantry of a crane be In when lifting a load?
1. highest position
2. third position
3. mid position
4. lowest position

Answer 18

1. highest position

page 25

Question 19

Jib forestay and backstay pendant lines should be:
1. of equal length, or the forestay pendant lines should be longer
2. of equal length, or the backstay pendant lines should be longer

Answer 19

2. of equal length, or the backstay pendant lines should be longer

page 27

Question 20

Determine If this statement is true or false. Jib capacity “increases” as the angle to the ground decreases.
1. true
2. false

Answer 20

2. false

page 28

Question 21

To avoid torsional loading, the boom tip sheaves should be reeved:
1. non-symmetrical
2. symmetrlcal
3. with an even number of line parts
4. with an uneven number of line parts

Answer 21

2. symmetrlcal

page 29, 30

Question 22

Which of these conditions could be dangerous when operating a crane around a newly constructed building?
1. height of structure
2. uncompacted soil
3. protected pedways
4. compacted soil

Answer 22

2. uncompacted soil

page 33

Question 23

Whenhoistingonoutriggerswithapermitted360degree swing, which position is the most hazardous in most conditions?
1. over front
2. over rear
3. over side
4. over corner

Answer 23

4. over corner

page 35,36

Question 24

Determine if this statement is true or false. The ground pressure under outriggers is higher than it Is under a crawler track because of a smaller bearing surface.
1. true
2. false

Answer 24

1. true

page 36,37

Question 25

Outrigger blocking should be approximately how much larger than the outrigger floats? 1. same 2. 1.5 times 3. 2 times 4. 3 times

Answer 25

4. 3 times ## Footnote page 37

Question 26

Determine if this statement Is true or false. When determining whether a crane Is level, percentage of grade and degree measurement Is the same. 1. true 2. false

Answer 26

2. false ## Footnote page 38

Question 27

On a 48 inch crane rotation ring, a crane 1% off-level would be how much in inches? 1. almost 5 inches 2. almost one-half inch 3. almost one-eighth inch 4. too small to measure

Answer 27

2. almost one-half inch ## Footnote page 38

Question 28

Determine if this statement is true or false. A crane sitting 3 degrees off-level with a long boom at minimum radius, can have an increase in boom stress of approximately 50%. 1. true 2. false

Answer 28

1. true ## Footnote page 39

Question 29

The load line is hanging in the dead center of the boom when positioned over the rear. With the boom over the side, the load line is observed to be off center. This means it is: 1. safe to lift over the rear 2. safe to lift over the corner 3. safe to lift over the side 4. not safe to lift untll level in all positions

Answer 29

4. not safe to lift untll level in all positions ## Footnote page 40

Question 30

Determine if this statement is true or false. Unless a crane has been so designed with a pinned intermediate location and a matching chart rating, a crane should be operated with all outriggers retracted or fully extended and set. 1. true 2. false

Answer 30

1. true ## Footnote page 41

Question 31

Determine if this statement is true or false. Computerized Load Moment Indicators warn the operator of an overload condition. 1. true 2. false

Answer 31

1. true ## Footnote page 41,42

Question 32

Determine if this statement is true or false. Use of computerized Load Moment Indicators Is a quick, easy method of checking a load weight that Is approved by crane manufacturers and safety regulations. 1. true 2. false

Answer 32

2. false ## Footnote page 42

Question 33

Crane stability is based on: 1. lever prlnciple 2. ability of crane hoist to lift load 3. load measurements 4. height of lift

Answer 33

1. lever prlnciple ## Footnote page 44

Question 34

The crane center of gravity will vary the most while swinging from rear to side to front with which type of machine? 1. crawler cranes 2. truck cranes 3. cherry pickers 4. same with all types

Answer 34

2. truck cranes ## Footnote page 46

Question 35

Determine if this statement is true or false.The approved swing working areas of a crane are referred to as quadrants of operation. 1. true 2. false

Answer 35

1. true ## Footnote page 47-49

Question 36

The effective weight of a jib is: 1. higher than the actual weight 2. lower than the actual weight 3. same as actual weight 4. depends on crane, could be any of the above

Answer 36

4. depends on crane, could be any of the above ## Footnote page 50

Question 37

When using the main load line with the jib attached, the working load for the boom must be reduced by: 1. weight of jib attachments 2. weight of jib pendants 3. weight of jib 4. manufacturer's specifications for Jib and hook weight reduction

Answer 37

4. manufacturer's specifications for Jib and hook weight reduction ## Footnote page 51, 52

Question 38

Determine if this statement is true or false. A common practice and safe method of determining when a crane is overloaded is to watch for and back off at the first indication of tipping. 1. true 2. false

Answer 38

2. false ## Footnote page 53, 54

Question 39

Determine if this statement is true or false. A crane that "goes light" is not yet overloaded, and can be safely returned to normal by rapid load lowering. 1. true 2. false

Answer 39

2. false ## Footnote page 53,54

Question 40

Boom angle is the measured angle between what and the centerline of the boom. 1. vertical 2. horizontal

Answer 40

2. horizontal ## Footnote page 55

Question 41

On load charts with the upper and lower numbers divided, the upper numbers are in the range that mean the crane will do what if it Is overloaded? 1. tip 2. structurally fail 3. cannot lift the load 4. none of above

Answer 41

2. structurally fail ## Footnote page 56

Question 42

Determine if this statement is true or false. When using crane load charts, It is not permitted to guess or calculate In between values. 1. true 2. false

Answer 42

1. true ## Footnote page 57,58

Question 43

If the measured radius between crane rotation point and load center is 57 feet, and the load chart only shows values at 55 feet and 60 feet, which value would be used? 1. 55 feet 2. 60 feet 3. must consider boom length 4. depends on load weight

Answer 43

2. 60 feet ## Footnote page 58

Question 44

Using the range diagram on page 61determine the approximate load radius with a boom length of 84 feet at an angle of 30 degrees. 1. 80 feet 2. 70 feet 3. 67 feet 4. 55 feet

Answer 44

2. 70 feet ## Footnote page 61

Question 45

Determine if this statement is true or false. The crane is always setup to specification, therefore the load chart does not have to be used to determine the required number of parts of line in the main load block to lift a load. 1. true 2. false

Answer 45

2. false ## Footnote page 62

Question 46

Determine if this statement is true or false. In general terms, everything below the boom tip, or jib tip is considered load. 1. true 2. false

Answer 46

1. true ## Footnote page 63,64

Question 47

Using load calculation example one, on pages 65, 66, but with a load weight of 53, 400 pounds, what would be the maximum operating radius allowed with the crawlers extended? 1. 50 feet 2. 55 feet 3. 60 feet 4. 65 feet

Answer 47

2. 55 feet ## Footnote page 65,66

Question 48

Determine if this statement is true or false. Even with high voltage power lines, it is not possible to have an electrical accident unless the crane or load actually hits the line. 1. true 2. false

Answer 48

2. false ## Footnote page 69

Question 49

Determine if this statement is true or false. A signal-person must be used if a crane can swing within the limit of approach of a power transmission line. 1. true 2. false

Answer 49

1. true ## Footnote page 71

Question 50

Determine if this statement is true or false. The operator should always jump out of the cab as quickly as possible if the crane makes contact with a power line. 1. true 2. false

Answer 50

2. false ## Footnote page 72