Introduction to EC3 quiz

Please answer the following 10 multiple choice questions, then click 'submit' to check the result. The pass mark for a CPD certificate is 8 out of 10, and you may retake the quiz as many times as you wish, but the questions will vary! Please note that one, two, three or all of the possible answers presented for each question may be right, and to gain a mark for that question all correct answers must be identified.

Good luck

Introduction to EC3

Must all connections be classified by calculation?

No, classification by experience of satisfactory performance is permitted
Only for elastic design
Only for plastic design
Only if being used outside the UK

Which of the following increase the risk of brittle fracture?

Colder temperatures
Tension
Thicker steelwork
Higher strain rates

What best describes a 'destabilising' load?

One applied between restraints
A load applied to the top flange
A load which is free to move laterally with the buckling flange
A non-vertical load, with a lateral component

What does a value of αcr = 11 indicate?

A very sensitive frame
That second-order analysis must be used
That the second-order effects are small enough to be ignored
That the approximate allowances for second-order effects cannot safely be used

When can the Eurocodes be used?

When Approved Document A in the Building Regulations is revised
Only when the client specifies design to the Eurocodes
Immediately
Only for projects outside the UK

Which of the following statements about columns in 'simple construction' are correct?

Only open sections (UKC) can be used
Design moments in the columns are based on nominal eccentricities
Beams are designed as simply supported
The approach cannot be used in Eurocode design

In expressions 6.61 and 6.62, what structural mechanics do the k factors account for?

The residual stresses in the member
The shape of the bending moment diagram
The influence of the axial load
The section shape

When would a designer need to refer to BS EN 1993-1-5 and its UK National Annex?

When determining snow loads
When calculating the resistance of the webs of rolled sections
When selecting a steel sub-grade
For design guidance on stainless steel

In flexural buckling, what non-dimensional slenderness is approximately equivalent to a slenderness L/ryy = 200?

0.5
1.5
2.5
3.5

How is ε calculated?

No need; it's given in the tables
ε = (235/fy)1/2
ε = (275/fy)1/2
ε = (355/fy)1/2