BCGBC4010A Apply structural principles to residential low-rise constructions

Structural principles - Structural members

Topic activity
Question 1
Which best describes a simply supported beam?
A.	A beam supported over three or more points
B.	A beam supported at one end only
C.	A beam which only has supports at each end
D.	All of the above 
E.	None of the above
The correct answer is C -  A simple beam only has supports at each end.

Question 2
A vertical compression member (or column) may also be referred to by what other term(s)?
A.	Post
B.	Strut
C.	Stanchion
D.	All of the above
E.	None of the above
The correct answer is D - All of the above. All of these terms are used to describe a column.

Question 3
Which of the following does not affect deflection?
A.	Span
B.	Load
C.	Shear force
D.	Shape
E.	Young’s modulus
The correct answer is C - Shear force. Shear force does not affect deflection of a beam.

Question 4
Where does the maximum amount of compression occur in a simply supported beam?
A.	Along the neutral axis
B.	At the most extreme upper fibres
C.	At the most extreme lower fibres
D.	Near the supports
E.	Mid span
The correct answer is B - At the most extreme upper fibres. Maximum compression occurs in the uppermost fibres.

Question 5
Where does the maximum amount of vertical shear occur within a simply supported beam?
A.	Consistently over the entire length of the beam
B.	Near the mid-span 
C.	Along the neutral axis
D.	At the most extreme upper and lower fibres
E.	Near the supports
The correct answer is E - Near the supports. Maximum vertical shear occurs near the supports.

Question 6
Given a simple beam spanning 10 m, how close to the supports can service holes be located?
A.	2.0 m
B.	2.5 m
C.	3.0 m
D.	3.3 m
E.	5.0 m
The correct answer is B - 2.5 m. The minimum distance from the supports is one quarter of the span which is 2.5 m (10 ÷ 4).

Question 7
Which of the following are the main types of wind bracing?
A.	Thigh, P, star
B.	Hip, J, cross
C.	Knee, K, cross
D.	Arm, K, star
The correct answer is C - Knee, K, cross. 

Question 8
When a concrete slab is subject to 'doming', in which part of the slab is the tensile stress?
A.	The lower surface of the slab
B.	The upper surface of the slab
C.	The stiffening beam under the slab
D.	The steel reinforcement
The correct answer is B - The upper surface of the slab. 

Question 9
Which of these terms are parts of a roof truss?
A.	Chord, knee, web
B.	Spider, pitch, chord
C.	Ankle, heel, tar
D.	Web, heel, pitch
The correct answer is D - Web, heel, pitch.

Question 10
What is the minimum bearing capacity of a concrete slab in a residential situation?
A.	25 kPa
B.	40 kPa
C.	50 kPa
D.	25 MPa
E.	50 MPa
The correct answer is C - 50 kPa.
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