Mobile 3 Potential Problems

Question 1

How must the rope on drums be wound

Answer 1

Tightly and evenly

Question 2

What can occur if rope is not wound correctly

Answer 2

Severe rope damage

Question 3

Name 9 common causes of poor drum winding and slack rope

Answer 3

Rope incorrectly installed on drum

Incorrect fleet angle

Rope to stiff for drum

Sheaves poorly lubricated or stiff from cold

Effect of wind on hoist line

Suddenly stopping a load during hoisting

Block or ball too light

Sudden change in rope tension

Overlowering

Question 4

Give a brief description of how to determine the correct Anchorage for rope on the drum

Answer 4

Find out if it’s over wound or under-wound

Find out if it’s left or right lay and use corresponding hand index out palm facing you for over wound and palm facing away for under wound
Extended finger always points to correct flange

Question 5

Give the fleet angle not to be exceeded on a grooves drum and the ratio

Answer 5

2 degrees

30:1

Question 6

Give the fleet angle not to be exceeded on a smooth drum and the ratio

Answer 6

1. 5 degrees

40: 1

Question 7

Name two possible solutions for rope that is too stiff

Answer 7

Would need a larger diameter drum

Get more supple rope

Question 8

How do you prevent problems from sheaves being to stiff or cold

Answer 8

Boom down and inspect all sheaves thoroughly

Try to warm up sheaves in cold weather by running line up and down slowly

Question 9

What can be caused by suddenly stopping the load as it’s being hoisted and how would you prevent this

Answer 9

Cause the load to jump which will cause slack in the line which in turn could loosen the wraps on the drum

Take care when Hoisting to keep consistent and smooth operation

Question 10

What common occurrence could prevent the rope from staying taught

Answer 10

Hook or headache ball to light

Ensure both are heavy enough for length of boom rope type and crane configuration

Question 11

Give two examples that could cause a sudden change in rope tension, resulting in slack rope momentarily which could cause loose coils on the drum or cross coiling

Answer 11

Lifting a load out of ice

Lifting a cut off portion of steel where the slag has re glued

Question 12

What else can cause the same effect in rope tension besides a load in ice or fresh cut steel and how do you prevent it

Answer 12

Overlowering the load

Slow down as you deposit load

Keep block and ball from touching ground

Question 13

What are 6 things to keep in mind when the temperature drops below freezing

Answer 13

Avoid maximum capacity lifts

Slow down cycle of operation

Do not dynamic or shock load any components

Proper hydraulic system warm up

Slow smooth infrequent lifting only if necessary

Lifting as per manufactures charts

Question 14

What would tell you the proper distance to maintain from power lines and where would you find it

Answer 14

Table 4 in z-150

Question 15

When would need to use a signal person or work area definition person ona site with power lines

Answer 15

If any part of the crane or load encroaches on the MSAD

Question 16

What six things is a site supervisor responsible for regarding power lines

Answer 16

Provide qualified signalman

Be aware of the requirements of electrical authority

If travel will be repeated then route will be marked with rider poles

Ensure the crane grounded where necessary

Report every incident involving contact to site safety inspector

Not use crane until it has been inspected by competent person

Question 17

What is the general MSAD from power lines

Answer 17

7 metres

Question 18

Name five steps to take in the event of contact with a power line

Answer 18

Do not panic

Remain in cab if feasible

Instruct all personnel to stay away

Try unaided with no one near to back of crane so it is clear of power line

If the machine can not get away or disentangled remain in the machine until things are de energized and safety is confirmed by electrical authority

Question 19

Be aware when working near transmitters the boom and load can become electrically charged.

What is the best way to prevent this and what should an operator wear getting on and off the crane

Answer 19

Synthetic sling between block and load

Rubber gloves

Question 20

Give 8 ways a lattice boom may collapse backwards

Answer 20

Boom angle higher than permitted

Sudden forward movement when at high boom angle

Hook block tied back and pulled to tight

Sudden release of load

High wind on front of boom

Two blocking

Swinging from downhill to up hill side

Starting or stopping swing suddenly

Question 21

What would be malfunction on a lattice boom if you boomed up higher than permitted

Answer 21

Boom kick out not working

Boom stops not set properly

Question 22

How does releasing a load suddenly cause backwards tip over

Answer 22

Boom deflection and stretching pendants will spring back

Question 23

How far must your crane be from MSAD

Answer 23

one full boom length

Question 24

Where is a boom at its strongest

Answer 24

A high angle

Question 25

When is the boom tip most likely to bend

Answer 25

When lowered to a dangerous point

Question 26

What must you do if the boom makes contact with something

Answer 26

Stop

The load should be removed from crane

Question 27

What are the causes of two blocking

Answer 27

Telescoping out

Booming down

Cabling up

Question 28

What is the anti two block comprised of

Answer 28

A weight

A connecting method

A sensor