Nccco Mobile Crane Core Review

Front 1

What is the purpose of placing mats or cribbing under outrigger floats?

Back 1

Distribute the force over a larger area.

Front 2

Where is the best location for leveling a Crane?

Back 2

Upperworks

Front 3

Before leveling a mobile Crane on outriggers, an operator should ensure that:

Back 3

There is no weight of the Crane bearing on any tires.

Front 4

If operating a mobile Crane with a long boom, on uneven ground, what support condition should be considered?

Back 4

Keeping a 90ﾟ angle between cylinder rod and pad.

Front 5

When may blocking (cribbing) be placed under outrigger beams on mobile cranes?

Back 5

Never approved.

Front 6

Mobile cranes should be level to within what percent of grade?

Back 6

1%

Front 7

Timber Crane mats work best when they are:

Back 7

Bolted together

Front 8

When arriving in the Crane at the job site, the operator should first determine the condition of the:

Back 8

Access roads

Front 9

What surface listed below would not be a good location for assembly or set up of a mobile Crane?

Back 9

Above underground vaults

Front 10

Each outrigger pad and it's blocking should be sufficient to support

Back 10

The total weight of the Crane and its load

Front 11

How does high wind affect a mobile Crane with a long boom?

Back 11

Introduces side load on to the boom

Front 12

When is the only time that outrigger beams should be less than fully extended?

Back 12

When the load chart indicates that this is allowed.

Front 13

What is the primary purpose for a rooster sheave or auxiliary boom point sheave?

Back 13

To separate the load hoist lines

Front 14

Eccentric main boom tip reeving causes what?

Back 14

Twisting of the main boom

Front 15

Which type of wire rope listed is installed on most cranes?

Back 15

Right regular lay

Front 16

The hoist drum flange shall extend a minimum of _____ over the top layer of wire rope at all times while Crane is in operation.

Back 16

½ inch

Front 17

Which of the following is classified as a standing wire rope?

Back 17

Pendant line

Front 18

When lifting on outriggers, the floats or pads should always be:

Back 18

Secured to the outriggers cylinder

Front 19

How many randomly broken wires in a lay length must there be on a mobile cranes hoist line, before it should be removed from service?

Back 19

6

Front 20

What is the minimum design factor required for a right regular lay, boom or hoists wire rope?

Back 20

3.5

Front 21

On a mobile Crane, how many broken wires are permitted at the end connection of a pendant before it must be taken out of service?

Back 21

1

Front 22

Type one rotation resistant hoist wire rope has a design factor of:

Back 22

5 to 1

Front 23

It is important to know when lubricating Crane hoist wire rope, that the lubricant must:

Back 23

Not hinder visual inspection

Front 24

How often is the competent person required to inspect the running wire ropes on a mobile Crane?

Back 24

Each shift

Front 25

On mobile cranes, how many broken wires must be present in one strand of one lay for running wire rope to be removed from service?

Back 25

3

Front 26

How many randomly distributed broken wires in rotation-resistant hoist wire rope are considered for replacement?

Back 26

2 broken wires in 6 rope diameters

Front 27

According to OSHA, what is the minimum number of full wraps of wire rope that must remain on hoist drums in all service conditions?

Back 27

2

Front 28

On whose recommendations should a mobile Crane preventative maintenance program be developed?

Back 28

Crane manufacturer

Front 29

On a mobile Crane, the measurement for the load radius is the distance from the center of gravity of the suspended load to the:

Back 29

Center of rotation of the Crane

Front 30

On a mobile Crane, should the load be applied when determining the proper boom angle?

Back 30

Yes

Front 31

On a mobile cranes range a diagram, boom length and boom angles can be used to determine what?

Back 31

Load radius

Front 32

When a mobile Crane, what is the weight of the stowed jib that is deducted in load chart calculations called?

Back 32

Effective weight

Front 33

When determining boom tip elevation for a mobile Crane, the user could:

Back 33

Use the range diagram

Front 34

The term net capacity is best defined as:

Back 34

Gross capacity minus capacity deductions

Front 35

When lifting off the main boom, how is the effective weight of the fly/jib different in the erected position from that of the stowed position?

Back 35

Effective weight increases

Front 36

Mobile cranes that are set up on barges, shall have a list chart provided by:

Back 36

Manufacture

Front 37

When lifting loads on tires, mobile cranes are rated at what percentage of tipping?

Back 37

75%

Front 38

How does the effective weight of a stowed extension relate to the actual weight of the extension?

Back 38

Lower than the actual weight

Front 39

When load radius is between radii values, the operator must use the:

Back 39

Longer radius

Front 40

Why do most Crane manufacturers reduce load capacity for duty-cycle operations?

Back 40

Side loading forces may occur

Front 41

Why should only approved attachments or extra counter weights provided by the manufacturer be placed on the rear of the Crane?

Back 41

They could cause a backward stability problem

Front 42

A mobile cranes jib is offset 15ﾟ versus its original 0ﾟ offset, but the boom angle remains unchanged. In the situation, the load radius:

Back 42

Increases

Front 43

What is the difference between an anti-two-block warning device, and an anti-two-block prevention device?

Back 43

Warning devices only warn, but prevention devices will stop the functions.

Front 44

How can the LMIs boom length or load radius reading be verified?

Back 44

Actual measurements

Front 45

On mobile cranes, what does the boom angle indicator show the operator?

Back 45

Angle of boom to horizontal

Front 46

What is the device called that automatically stops the boom when it rears the cranes maximum angle?

Back 46

Boom hoist limiting

Front 47

When the number of layers of wire rope on a drum increases the:

Back 47

Allowable line pool decreases

Front 48

On a mobile Crane, side loading of the boom could be caused by which of the following?

Back 48

Starting or stopping the swing to rapidly

Front 49

Which person listed below, has the responsibility for determining the correct weight of a load?

Back 49

Lift director

Front 50

What must an operator do when an operator leaves the controls of the Crane for an extended period of time?

Back 50

Apply all breaks and dogs, and lower the load to the ground

Front 51

Abruptly stopping a rapid swing on a long boom mobile Crane will produce what major effect

Back 51

Collapsing the boom

Front 52

When should a tagline be used, during the hoisting of material?

Back 52

When the rotation of the load would be dangerous

Front 53

What percentage of the rated capacity of a mobile Crane must be used when lifting with 2 cranes attached to the same load?

Back 53

75%

Front 54

When lifting a load with two mobile cranes, it is very important to:

Back 54

Keep the hoist lines of both cranes vertical

Front 55

If lifting a load with to mobile cranes of different rated capacities the Crane with the larger rated capacity should:

Back 55

Be hooked at a distance closer to the load center of gravity

Front 56

When determining the position a mobile Crane should be left in overnight with high winds in the forecast the operator should:

Back 56

Follow manufacturers recommendations

Front 57

When performing a multiple Crane lift it is important for the operators of each Crane to understand that:

Back 57

The weight may increase if the other Crane lands the load

Front 58

When lifting loads that are submerged under water with a mobile Crane, what is one of the conditions at the operator should be familiar with?

Back 58

Load will increase when lifting out of water

Front 59

When lifting over water with a personnel platform, what are the occupants of the platform required to wear?

Back 59

A flotation device

Front 60

If a mobile Crane is not set up level and the operator swings the load from the high side to the low side, what effect will that have on the radius?

Back 60

The radius increases

Front 61

Increasing the distance from the Crane center of gravity to the tipping access will have what effect on a mobile Crane?

Back 61

Increase stability

Front 62

Backwards to bility of a mobile Crane is tested in which configuration?

Back 62

Basic boom at maximum angle with no load

Front 63

What is the minimum pitch diameter used for sheaves in a boom hoist reeving system using rotation-resistant wire rope?

Back 63

No less than 18 times rope diameter

Front 64

When can capacity altering modifications be made to mobile cranes?

Back 64

When permission is given by the Crane manufacturer

Front 65

A Crane is at the point of instability when the cranes leverage on the load equals:

Back 65

100% of the loads leverage on Crane

Front 66

Who must determine maximum speed for a mobile Crane to travel with a suspended load?

Back 66

The competent person

Front 67

Deflection of the boom while operating a mobile Crane will increase what?

Back 67

Load radius

Front 68

A sudden start or stop of the hoisting function while operating a mobile Crane can produce a:

Back 68

Dynamic load

Front 69

When traveling with a suspended load on a mobile Crane climbing an incline, the load should be carried in which direction

Back 69

Uphill

Front 70

Which mobile Crane boom configuration can cause the most hazardous side loading condition for the Crane?

Back 70

Long boom with minimum radius

Front 71

When preparing to hoist a load, the load block hook should be positioned:

Back 71

Directly above the load center of gravity

Front 72

When making a lift on outriggers, the maximum ground bearing pressure occurs in which boom position?

Back 72

Over the corner

Front 73

When personnel platforms are hoisted with a mobile Crane, what item listed must be provided?

Back 73

In anti two-block device

Front 74

Personnel platforms suspended on the hook of a mobile Crane, must not exceed what percentage of a cranes capacity at any given radius?

Back 74

50%

Front 75

When proof testing a personnel platform to a 125% of its rated capacity, how long must the platform be suspended?

Back 75

5 minutes

Front 76

Which of the following correctly states the requirements for hooks used to hoist employees on a Crane supported personnel platform?

Back 76

Hook shall have a latch that closes and locks

Front 77

OSHA permits hoisting of personnel by a Crane as long as the employer can show:

Back 77

There is no less hazardous or practicable way

Front 78

Before lifting an occupied personal platform on a job site the crew must ensure they:

Back 78

Attend a pre lift meeting, fully deploy all outriggers, and perform a trial lift

Front 79

Before lifting in occupied personnel platform on a job site one must:

Back 79

Use 50% of cranes rated capacity, trial lift anticipated load wait, ensure rigging is dedicated to platform only.

Front 80

Which standards or regulations governs the lifting of personnel and construction?

Back 80

OSHA 1926.1431.

Front 81

According to OSHA 1926.1431, which device must be attached to the Crane?

Back 81

Anti two block

Front 82

According to OSHA 1926.1431, what type of hoist is prohibited

Back 82

Hoist free fall

Front 83

Inside the personal platform except for gates, how much of the perimeter must contain a grab rail for the occupants?

Back 83

100%

Front 84

According to OSHA 1926.1431, which personnel platform hoisting operations, access gates shall not swing in which direction?

Back 84

Outward

Front 85

OSHA 1926.1431 states that tag lines must be used:

Back 85

When necessary to control platform

Front 86

According to OSHA 1926.1431, while hoisting a personal platform, what weather condition will promptly discontinue the operation?

Back 86

Dangerous

Front 87

While hoisting employees in a personnel platform, direct communication must be maintained between the signal person and who?

Back 87

Operator

Front 88

According to OSHA 1926.1431, at what wind speed must a qualified person be consulted?

Back 88

20 miles per hour

Front 89

If working near power lines and using a tag line, which type of rope is least conductive to electricity?

Back 89

Polypropylene

Front 90

When working near power lines with a mobile Crane, where does OSHA require caution stickers be installed on all equipment?

Back 90

At operator station and two on the outside of the equipment

Front 91

According to OSHA table T, what is the minimum clearance for 133 kV power lines?

Back 91

10 ft

Front 92

According to OSHA, when working near power lines when is a dedicated spotter required?

Back 92

When Crane operator is unable to see the warning line of signs

Front 93

According to OSHA stable T, what clearance should a mobile Crane in transit keep while going under 445kV lines?

Back 93

16 ft

Front 94

According to OSHA when is it safe to hoist loads with a mobile Crane below energized power lines?

Back 94

When the fully extended boom can't reach the prohibited zone

Front 95

According to OSHA 1926.1408, when operating rear high voltage power lines, what clearance shall be required when the rating of the lines is 275kV?

Back 95

20 ft w/encroachment precautions

Front 96

According to OSHA 1926.1411, when you encounter power lines with a voltage of 44kV and the Crane is traveling, according to table T, what is the minimum required clearance?

Back 96

6.

Front 97

According to OSHA 1926.1408, the minimum clearance between any part of the Crane and power lines rated 50kV or below shall be:

Back 97

10 ft w/ encroachment precautions

Front 98

According to OHSA 1926.1408, for power lines rated a 100kV, the minimum clearance between the Crane and any line shall be:

Back 98

15 ft w/ encroachment precautions

Front 99

The term "jib offset" can be expressed as the jib angle to which mobile Crane component?

Back 99

Boom

Front 100

On a mobile Crane the term "parts of line" refers to which item?

Back 100

The number of lines running through the load block and boom point sheaves

Front 101

According to OSHA, mobile Crane load block hooks must not have a twist in excess of:

Back 101

Zero degrees

Front 102

According to OSHA, mobile Crane load block hooks must not have a throat opening in excess of

Back 102

5% of its original size

Front 103

What is the design factor for grade 80 chain slings?

Back 103

4.

Front 104

What grade alloy steel chain should be used for hoisting slings?

Back 104

80.

Front 105

Loads rigged using and basket hitch should be _____ to prevent slippage.

Back 105

Balanced

Front 106

When slings encounter sharp edges on loads to be lifted, riggers shall ensure that slings are:

Back 106

Protected or padded

Front 107

According to OSHA, quadruple sling bridle ratings are the same as:

Back 107

Triple sling bridle ratings

Front 108

When correctly installing U-bolt type wire rope clips, the U portion of the clip shall be on:

Back 108

The dead or short end

Front 109

As horizontal load angle decreases, what increases?

Back 109

Stress

Front 110

The approximate percentage of strength of choker, vertical, and basket hitches respectively:

Back 110

75%, 100% and 200%

Front 111

According to ASME, what shall not be used for the suspension system on suspended personnel platforms?

Back 111

Synthetic web bridle

Front 112

When rigging a bundle of pipe or tubing, which of the following would provide the best contact between sling and load?

Back 112

Double wrap choker

Front 113

What is the best angle between the top of the load and the sling leg referred to in sling load charts?

Back 113

Horizontal sling angle

Front 114

When installing a wedge socket, it must be attached with the load line pulling in a straight line from the:

Back 114

Pin

Front 115

For any signal other than emergency stop, who is permitted to give hand signals to the Crane operator during a lift?

Back 115

A qualified signal person

Front 116

What does this mean?

Back 116

Move slowly

Front 117

What does this mean?

Back 117

Use whipline

Front 118

What is the first element of voice signals given to a Crane operator prior to the lift?

Back 118

Function and direction

Front 119

According to OSHA, each series of voice signals contain how many elements?

Back 119

Three

Front 120

What does this mean ?

Back 120

Lower

Front 121

What does this mean?

Back 121

Swing

Front 122

What does this mean?

Back 122

Lower boom and raise load

Front 123

What does this mean?

Back 123

Emergency stop

Front 124

What does this mean?

Back 124

Lower boom

Front 125

What does this mean?

Back 125

Dog everything

Front 126

What does this mean?

Back 126

Raise boom, lower load

Front 127

What does this mean?

Back 127

Stop

Front 128

When directing a Crane using voice signals the transmission must be through a channel that is:

Back 128

Dedicated

Front 129

Before commencing lifting operations, the operator and signal person must contact and identify each other when using which form of communication?

Back 129

Voice signals

Front 130

According to OSHA where must a signal chart be posted?

Back 130

On the equipment or in the area of the hoisting operation

Front 131

How many audible travel signals are there?

Back 131

Three

Front 132

What does this mean?

Back 132

Use main hoist

Front 133

What does this mean?

Back 133

Hoist

Front 134

What does this mean?

Back 134

Raise boom

Front 135

What does this mean?

Back 135

Extend boom