E-2 (answers)

Question 1

What is the minimum breaking strength required of a fibre rope used to lift a 400 kg workers?

Answer 1

4000 kg

Question 2

The best knot to use to attach a tag line to the load is

Answer 2

Bowline

Question 3

The centre of gravity of an object to be lifted is that point at which the object will ______ regardless of the objects position

Answer 3

Balance

Question 4

The double basket hitch should be set so that the angle to the HORIZONTAL is never less than

Answer 4

60 degrees

Question 5

The most suitable way to tie two ropes of different diameter together is with a:

Answer 5

Sheet bend

Question 6

A correct method for determining a safe sling angle is

Answer 6

the sling length is longer than the horizontal distance between the attachment points

Question 7

A knot in a fibre rope reduces the strength of the rope by

Answer 7

1/2

Question 8

A pull that is 45 degrees from the vertical on a shouldered eye-bolt, reduces the safe working load by

Answer 8

75%

Question 9

How many legs of a double basket hitch can be considered to be supporting the load?

Answer 9

4

Question 10

How many legs of a four leg bridal hitch may be considered to be supporting the load

Answer 10

2

Question 11

How many legs of a triple bridal hitch can be considered to be supporting the load

Answer 11

2

Question 12

What is the nearest safe distance you are to maintain from even the lowest voltage
“high-tension” power line when rigging?

Answer 12

3.0 M

Question 13

The safety factor for ropes used to support a worker is

Answer 13

10

Question 14

The sling attachment points on a load should always lie _____ the centre of gravity on the load

Answer 14

Above

Question 15

The spacing between cable clips is usually equal to approximately

Answer 15

6 rope diameters

Question 16

The tag line should be

Answer 16

Made of non conducting material

Question 17

Tirfor jacks can be made to travel in the opposite direction by:

Answer 17

Relocating the pipe handle to the other level

Question 18

To avoid electrical shock, a tag line should be made of

Answer 18

Polypropylene rope

Question 19

To make a secure attachment to a pipe that must be lifted on end using a rope you should tie a

Answer 19

Timber hitch

Question 20

U bolt cable clips must be installed so their u bolts are on

Answer 20

The dead end of the rope

Question 21

When forming a loop into the end of a wire rope what must be used

Answer 21

A thimble

Question 22

What will happen if you exceed the lifting capacity of a wire rope winch (tirfor jack)

Answer 22

A shear pin within the winch will break

Question 23

When slings are new what is the allowable percentage by which the SWL may be exceeded when lifting materials

Answer 23

0%

Question 24

Which of the following fibre ropes is most resistant to shock loads

Answer 24

Nylon

Question 25

Which of the following is the most suitable to make a secure loop in the end of a rope

Answer 25

Bowline

Question 26

Which of the following types of rope is the strongest

Answer 26

Nylon