1. Minimum diameter of bolt when member is less than 16mm thick is
a) 8
b) 10
c) 22
d) 20
Explanation: Rivets/bolts should not be less than 16mm in diameter for member less than 10mm thick, 20mm in diameter for member less than 16mm thick and 22mm in diameter for member more than 16mm thick.
2. Which of the following is not true?
a) spacing of tack bolt should be less than 600mm
b) spacing of tack bolt should be greater than 600mm
c) if bolts are used, they should be spaced longitudinally at less than 4 times the bolt diameter
d) connection should extend at least 1.5 times the width of the member
Explanation: Spacing of tack bolt should be less than 600mm. If bolts are used, they should be spaced longitudinally at less than 4 times the bolt diameter. Connection should extend at least 1.5 times the width of the member.
3. Members connected back-to-back connected by bolts should be
a) not be used
b) subjected to transverse loading in plane perpendicular to bolted surface
c) subjected to twice the transverse loading in plane perpendicular to bolted surface
d) not subjected to transverse loading in plane perpendicular to bolted surface
Explanation: Members connected back-to-back connected by bolts should not be subjected to transverse loading in plane perpendicular to riveted/bolted/welded surface.
4. For members placed back-to-back, the spacing of bolt should not exceed
a) 12t
b) 16t
c) 18t
d) 20t
Explanation: For members placed back-to-back, the spacing of bolt should not exceed 12t or 200mm, where t is thickness of member.
5. Longitudinal spacing between intermittent welds used for connection should be
a) greater than 18t
b) greater than 16t
c) not greater than 16t
d) equal to 18t
Explanation: Longitudinal spacing between intermittent welds used for connection should not be greater than 16t, where t is thickness of thinner connection.
6. A column that can support same load in compression as it can in tension is called
a) intermediate column
b) long column
c) short column
d) cannot be determined
Explanation: A column that can support same load in compression as it can in tension is called short column. Short column usually fail by crushing.
7. The strength of compression members subjected to axial compression is defined by curves corresponding to _______ classes
a) a, b, c and d
b) a, d
c) b, e, f
d) e, f, g
Explanation: The strength of compression members subjected to axial compression is defined by curves corresponding to a, b, c and d classes. The value of imperfection factor depends on type of buckling curve.
8. Which of the following is not a compression member?
a) strut
b) boom
c) tie
d) rafter
Explanation: Strut, boom and rafter are compression members, whereas tie is a tension member.
9. The best compression member section generally used is
a) single angle section
b) I-section
c) double angle section
d) channel section
Explanation: Generally, ISHB sections are used as compression members.
10. The best double-angle compression member section is
a) unequal angles with short leg connected
b) unequal angles with long leg connected
c) unequal angles on opposite side of gusset plate
d) unequal angles on same side of gusset plate
Explanation: Unequal angles with short leg connected are preferred as compression member section.