Tower Crane A04 Theory Questions

Front 1

Which parts of the crane is the (lifting) radius measured from?

Back 1

Centre of slew ring to the centre of the hook.

Front 2

a)What is the purpose of a method statement?

b)What is required of the operator?

Back 2

a) To give instruction on a specific task and how to do it safely.

b) Crane operators MUST ALWAYS work towards method statement

Front 3

What is the difference between a CONTRACT LIFT and a STANDARD CRANE HIRE?

Back 3

CONTRACT LIFT: Crane company plan and supervise the lift

STANDARD CRANE HIRE: Work to hirers company lift plan.

Front 4

What is jib deflection and when does it occur?

Back 4

Bend/sag in the jib happens when lifting heavy loads.

Front 5

a) What is meant by the lifting capacity of the crane?

b) Who determines it?

Back 5

a) The maximum a crane can lift depending on the configuration.

b) The manufacturer determines this

Front 6

What is the purpose of the cranes counter-weight?

Back 6

Reduces over turning effect.

Front 7

A tower crane has been delivered to site, assembled and configured for lifting. What must be carried out before lifting? and by whom?

Back 7

Must be inspected by an authorised competent person.

Front 8

If a load of 20 tonnes is lifted on four falls of rope what is the tension in each fall?

Back 8

5 Tonnes ( 20/4)

Front 9

The safe working load or working load limit (SWL/WLL) of a multi leg chain sling only applies in what TWO configurations?

Back 9

1, Each leg is equally loaded

2, Within 90° of eachother (45° from vertical)

Front 10

If fitted what is the purpose of having flags situated on the jib?

Back 10

To show the radius of the crane and safe working load at that position of the jib.

Front 11

Only 2 legs of an 8 tonne 4 legged chain sling are used, what is the maximum load that can be lifted?

Back 11

4 tonnes. (8/2)

Front 12

Why should luffing jibs be placed in the correct out of service position at the end of the day?

Back 12

To allow the crane to weather vane.

Front 13

If setting up to lift loads near a pedestrian aream what main factor needs to be taken into account?

Back 13

The segregation of pedestrians from overhead loads using barriers, exclusion zones and other resources.

Front 14

a) at the end of the shift what FOUR security measures should be applied?

b)Why?

Back 14

a)

1, Isolate crane controls

2, Lock cab door

3, Turn off Power

4, Secure access to crane at ground level.

b) you do not want any unplanned movement of the crane, and you do not want any unauthorised access to the crane outside of working hours.

Front 15

What does the Health and Safety at work act require employers to do with regards to plant?

Back 15

To provide plant that is safe to operate and maintain (so it poses no risk to health)

Front 16

What determines the minimum distances that any part of plant and machinery has to be kept from overhead electricity lines?

Explain why a distance must be kept.

Back 16

The minimum distance is determined by the voltage of the over head electricity lines.

Electricity can ARC and jump across gaps.

Front 17

If the words STOP NOW are given to the crane operator by radio during the lift, what action must the operator take.

Back 17

Stop control of crane in a controlled and safe manner.

Front 18

Wind speeds can be variable throughout the working day, what actions must be taken to ensure safe working conditions are maintained?

Back 18

Lift loads carefully and check wind speeds regularly with the Anemometer.

Front 19

If radios are to be used during the lifting operations what FIVE actions and checks must be made bu the crane operator before use?!

Back 19

1, Check batteries (carry spares)

2, Check radios are working

3, Set to the correct channel

4, Make sure it is UHF/VHF licensed

5, Check signal strength

Front 20

a)How does the number of lines or falls of rope affect the lifting capacity of the crane?

b)How is hoist speed affected when the number of lines is reduced?

Back 20

a) It affects the lifting capacity.

b) The hoise speed increases when lines are reduced.

Front 21

List SIX typical subjects that should be covered in a site induction.

Back 21

1, Fire safety

2, Accident/near miss reporting

3, Correct PPE

4, Waste disposal

5, Dust control

6, Traffic routes

(toilets/access and egress/emergency procedures etc)

Front 22

What is the main purpose of the rated capacity indicator.

Back 22

To give warning of when the crane approaches or exceeds maximum rated lift.

Front 23

What is meant by a floor climbing tower crane?

Back 23

Cranes situated in the lift shaft, they rise as the building goes up.

Front 24

What re the possible outcomes of facing prosecution for not complying with legislation and regulations?

Back 24

Fine/Imprisonment.

Front 25

Name THREE ways that a hired in crane driver can contribute in ensuring repeat business?

Back 25

1, Work Safely.

2, Cooperate with others.

3, Be punctual.

Front 26

Name THREE ways in which a crane operator can reduce their impact on the environment.

Back 26

1, Efficient use of the crane.

2, Correct waste disposal.

3, Prior planning of lifts.

( have a well maintained crane)

Front 27

If a load is slewed rather quickly what two inital effects does it have on the load whilst slewing?

Back 27

Load can trail the jib causing load to swing outwards increasing the radius.

Front 28

What is the definition of a hazard?

Back 28

A danger or a risk.

Front 29

Name THREE ways in which wind speed can affect the lifting operations.

Back 29

1, Increase/decrease slewing speed.

2, Creates load swing (can put load outside of radius)

3, Can stop lifting operations.

Front 30

State the functions of the following roles: a) Appointed person

b) Crane Supervisor

c) Crane operator

d) Slinger/Signaller

Back 30

a)

-Overall planning and reviewing of lift plans

-Production of risk assesments.

-Leading team and making appointments.

-Ensuring examinations and inspections are carried out.

b)

-Supervising to ensure method statements are being followed and that work is being carried out safely and efficiently.

c) Setting up and operating crane to given instruction.

d) Attaching and detaching loads and signalling and communicating with crane operator.

Front 31

a) In what environments are luffing units commonly used?

b) why are they used?

Back 31

a) Luffing units are used in built up areas.

b) It can operate in tight areas and reduces the problem of over sailing over adjacent buildings.

Front 32

Where should the operators manual be kept and why?

Back 32

In the cranes cab for easy reference.

Other people may need to see it for example Maintenance staff, erection staff and supervisors.

Front 33

Why is it important to follow manufacturers procedures precisely when assisting in setting/erecting up a crane?

Back 33

To avoid accident, incidents or damage to the crane.

Front 34

At the end of the shift:

a) How should cab cleanliness be maintained?

b) Explain why.

Back 34

a) Take your rubbish with you at the end of the day.

b) For the comfor and hygiene of yourself and other crane drivers.

Front 35

If a load is being slewed at a speed too high for it's size, What TWO factors must the operator and signaller take into account?

Back 35

1, Time and distance to stop.

2, Excessive swing, snatching and shock loading.

Front 36

When slewing with a load, where should the operator be looking?

Back 36

Operator should be looking ahead of the load.

Front 37

What prevents the hook blokc from contacting the jib pulley?

Back 37

The cut out/limit switch.

Front 38

What THREE main duties of the health and safety at work act must employees follow?

Back 38

1, Take care of ourselves and others.

2, Cooperate with employer.

3, do no recklessly or deliberately interfere with health and safety issues.

Front 39

Name TWO ways that wet weather can affect lifting operations.

Back 39

1, Loads can become heavier (porous materials like sand)

2, Reduced visibility.

Front 40

What is meant by a cast in base?

Back 40

Crane is cast into a large concrete pad or in building foundations.

Front 41

The operator has to use a new model of crane that he is not familiar with. What do regulations (ie LOLER 98) require the operator to check?

Back 41

Make sure that you have correct training, information and instruction.

Front 42

On a busy site, how would a slinger be identified?

Back 42

By their PPE.

Front 43

What do the work at heights regulations require of tower crane operations.

Back 43

Control measures in place to reduce the risk of falling.

Front 44

Why are hard hats needed for climbing tower cranes?

Back 44

Falling objects and bangs to the head.

Front 45

a) Where must the load radius diagram be located?

b) What information must it contain?

Back 45

a) On the base of the crane.

b) Information on safe working load at different radius and which configuration of rope/falls.

Front 46

What problems can be created when operating a crane in high speed drive?

Back 46

Excessive swing, snatching and shock loading.

Front 47

What effect can a swinging load have on a crane?

Back 47

It can create unstability of the crane and can increase the loads radius.

Front 48

What are the THREE actions a crane operator must undertake during pre use inspections?

Back 48

1, Check Manufacturers recommendations.

2, Check base of crane for the load radius diagram to check for information on SWL at different radius and different configurations of rope/falls.

3, Check operations manual.

Front 49

Why are crane operators considered safety critical workers?

Back 49

Because their actions have serious health and safety consequences to themselves and others.

Front 50

The number of falls has been changed on the hook, how has this action affected the RCI?

Back 50

It has changed the lifting capacity of the cran, The RCI needs to be adjusted.

Front 51

Apart from the operator who else needs to use the machines operator manual?

Back 51

1, Maintenance staff

2, Erection staff

3, Supervisors.

Front 52

Name FIVE requirements that must be followed if accessing the end of the jib for maintenance purposes?

Back 52

1, Authorised.

2, Harness trained.

3, Correct PPE

4, Good weather

5, Rescue plan in place.

Front 53

Two cranes are working in the same vicinity that encroaches on the operating radius of each.

What actions would the lift plan/method statement normally specify?

Back 53

Method statement/lift plan would need to specify limits on slewing.

(requires good communication between signaller and operator)

Front 54

If the hook block inadvertently lands, what course of action should be taken?

Back 54

1, Hook block checked for damage

2, check rope alignment

3, check crane drum for rope crossover

4, find out why it happened.

Front 55

Why are some tower cranes rail mounted?

Back 55

So that they can cover a larger working area.

Front 56

what is the purpose of a risk assesment?

Back 56

To Identify hazards and place control measures on them.

Front 57

What makes up total gross weight of a load?

Back 57

1, Load itself.

2, Hook block.

3, Lifting accessories.

Front 58

Why must tools not be kept on deck?

Back 58

Prevents trips, slips and falls.

Front 59

During the lifting operation, part of the task cannot be carried out as detailed in the lift plan.

a) What initially must happen to lifting operations?

b)by whom?

Back 59

a) Work must STOP

b) Appointed person.

Front 60

Name FOUR types of disciplinary action that employers and judicial bodies can apply to operators who do not comply to rules and legislation?

Back 60

1, Verbal warning

2, Written warning.

3, Dismissal.

4, Prosecution.

Front 61

How can a qualification or card benefit an operator?

Back 61

Proof of training and competency to employer.