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NCCCO > Core Test 1 > Flashcards

Core Test 1 Flashcards

1
Q

The term “Superstructure or Upper Works” refers to the area of the crane:

A

Above the swing circle

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2
Q

A crane must be level within _____% for the load chart ratings to be valid

A

1%

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3
Q

On what principle is crane stability based?

A

Leverage

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4
Q

What would be the effect of moving the tipping axis to the cranes center of gravity?

A

Reduced stability

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5
Q

Which of the following matches the appropriate load chart to a particular crane?

A

Serial number

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6
Q

A durable rating chart with legible letters and figures shall be provided with each crane and attached in a location accessible to

A

The operator while at the controls

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7
Q

The lifting capacities listed in the load chart assume that:

A

The lift is to be performed under ideal conditions.

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8
Q

A “rough terrain” crane set up on outriggers that is based on 85% tipping should have the tires:

A

Off the supporting surfaces.

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9
Q

Load charts are based on stationary loads, which are also known as:

A

Static Loads

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10
Q

The capacities in a mobile crane’s load chart are based on either structural limits or?

A

Stability

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11
Q

The values in the manufacture’s load chart show:

A

Rated capacities

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12
Q

Net capacity is:

A

Manufacture’s load ratings minus capacity deductions.

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13
Q

When determining the “gross load” the best method is:

A

Get an accurate load weight and add the rigging.

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14
Q

The weight of load handling devices, such as load blocks, spreader bars, and slings are considered:

A

Parts of the load.

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15
Q

Gross capacity is 10,300 lbs. total deductions are 7,622 lbs. What is net capacity?

A

2,678 lbs.

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16
Q

Boom length is measured from the:

A

Center of the heel pin(s) to the center of the boom tip sheaves.

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17
Q

The boom angle indicator indicates the booms angle to the:

A

Horizontal

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18
Q

Load radius is defined as: the horizontal distance from the centerline of rotation from the centerline of rotation to the centerline of the vertical hoist line with:

A

The rated load suspended

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19
Q

You are lifting a load directly under the hook. As you apply tension on it and the load lifts from the ground it swings away from the crane. What caused the increase in load radius as should have been anticipated before the lift took place?

A

Boom Deflection

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20
Q

A crane that is set up properly should have the tires off the supporting surface and the blocking under the float pads should be:

A

Sufficient to support the crane and the load.

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21
Q

When a boom extension considered to be in its stowed position, it is:

A

Pinned to the bottom base section.

22
Q

Crawler cranes produce the least amount of ground pressure is over the:

A

Side

23
Q

What is the best source of information for determining boom tip height?

A

Working range diagram

24
Q

What is the purpose of a work area diagram (chart)?

A

To identify operational quadrants

25
Q

On a telescoping boom truck crane with outriggers properly positioned, the working area chart will indicate that the “over front” area is:

A

Determined by the crane manufacturer.

26
Q

When the load radius falls between the capacities listed in the load chart us the gross capacity for the next

A

Longer radius

27
Q

When the boom angle falls between the capacities listed in the chart use the gross capacity for the next:

A

Lower boom angle

28
Q

When load weights are between the values listed in the load chart, the value that must be used is the:

A

Higher at a shorter radius.

29
Q

A Load Mount Indicator (LMI) is a computer installed on cranes designed to: Provide the operator with information regarding the boom length, boom angle, boom tip height, working radius, rated load, and total calculated weight being lifted by the crane. The LMI also warns the operator when an overloading situation is about to occur.

A

TRUE

30
Q

A crane operator plans to lift a gross load that weighs 26,300 lbs. Based solely on the line pull of the crane being 6000 lbs, what are the minimum parts of the line required to make the lift?

A

Five

31
Q

Backward stability on a truck mounted crane could be dangerous when the crane is working on rubber, at maximum boom angle, minimum boom length:

A

Over the side at a minimum radius.

32
Q

Hydraulic cranes shall be equipped with holding valves to prevent boom lowering in the event of

A

Hydraulic failure

33
Q

What is the sum of the following deductions?

A

1,605 lbs.

34
Q

What is the minimum number of wraps required by OSHA to remain on load hoist drums?

A

2 wraps

35
Q

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

A

Not hinder visual inspection

36
Q

When replacing the hoist on a crane, how do you determine the size or type of wire rope?

A

Use manufacturer’s operators manual or load chart

37
Q

On running ropes showing any evidence of heat damage, or wear of one third of the original diameter of the outside individual wires you must:

A

Remove the rope from service.

38
Q

The most commonly used rope for hoist lines is right regular (RRL). How many randomly broken wires must there be to remove a RRL from service?

A

6 in one lay or 3 in one strand in one lay.

39
Q

Breaking strength divided by the design (safety) factor equals:

A

Safe Working Limit (SWL)

40
Q

When retracting the boom on a telescopic boom crane:

A

The hook and load decreases their height off the ground.

41
Q

What is 77,208/8?

A

9,651

42
Q

Which unsafe condition could result when a wedge socket is attached directly to a load hook, using 6x19 IWRC?

A

Spinning the load

43
Q

Which of the following will indicate internal damage or ultimately core failure in rotation-resistant rope?

A

Diameter Reduction

44
Q

When a jib is erected from the stowed position and not used, how will its effective weight change?

A

It increases

45
Q

When operating a telescopic boom crane equipped with an anti two-block prevention device, which hydraulic functions are disabled when the device is activated?

A

Hoist, extend the boom, and raise the boom

46
Q

A load applied at an angle to the vertical plane of the boom describes:

A

Side loading

47
Q

What is the primary purpose of a power take off (PTO)?

A

Provides power transfer to the hydraulic pump(s)?

48
Q

Rapid hoist acceleration

A

Produces hook loads higher than the actual load weight.

49
Q

When is it permissible to leave a telescopic boom crane unattended with the crane running?

A

When operator can observe unauthorized entry.

50
Q

The crane is performing a pick and carry operation. Some important factors that should concern an operator are: The load being as low as possible, boom as short as possible, centered over the front and:

A

Tire pressure

NCCCO (1 decks)

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