Solved Example: 9091-01

The design strength of a tension member is given by a minimum of

i) Block shear strength of end region

ii) Rupture of critical section

iii) Yielding of net section

A. Only i)

B. i) and ii)

C. i) and iii)

D. i), ii) and iii)

Correct Answer: B

Solved Example: 9091-02

A tie member consists of ISA 100 $\times$ 75 $\times$ 8 longer leg is connected to a gusset plate. The gross cross sectional area of connected and unconnected leg are _______ mm$^2$ respectively. (KPSC JE 2016)

A. 768 and 568

B. 344 and 288

C. 976 and 654

D. 1206 and 743

Correct Answer: A

Solved Example: 9091-03

A steel plate is 300 mm wide and 40 mm thick is connected using 24 mm dia bolts of 3 numbers. The net sectional area of the plate is: (TN TRB Civil 2012)

A. 9840 mm$^2$

B. 8880 mm$^2$

C. 9480 mm$^2$

D. 8490 mm$^2$

Correct Answer: B

Solved Example: 9091-04

Lug angles: (SSC JE CE Paper V Mar 2017 Evening)

A. Are used to reduce the length of connection

B. Are unequal angles

C. Increases shear legs

D. All options are correct

Correct Answer: A

Connections are devices which are used to join elements of a structure together at a point such that forces can be transferred between them safely. Types of Connections according to connecting medium:

• Bolted Connections: Black Bolts, Turned Bolts, Ribbed Bolts
Advantages:
• Silent operation
• Cold process, so no risk of fire
• Quicker than riveting
• Less manpower required
Disadvantages:
• Reduction in strength due to loosening if subjected to vibrations
• Unfinished bolts have lesser strength because of non-uniform diameter.
• Welded Connections
Types of Welds:
• Fillet
• Plus
• Slot
• Plug and Slot
Advantages of Welding:
• Economical
• Higher efficiency than rivets
• Fbraication of complex structures is easy.
• Provides rigid joints
Disadvantages of welding
• Greater chances of cracking
• Members may distort due to uneven heating and cooling
• Inspection is difficult and costly.
• Riveted Connections

Solved Example: 9090-01

What will be the Minimum size of fillet weld if the plate thickness is less than 10mm? (MP Sub Engg Civil Sep 2018 Shift II)

A. 6 mm

B. 3 mm

C. 4 mm

D. 5 mm

Correct Answer: B

Solved Example: 9090-02

In a double riveted double-covered butt joint, the strength of the joint per pitch length in shearing the rivets P$_d$ and strength of one rivet in single shear P$_s$ are related as: (SSC JE CE Paper VI Sep 2019 Morning)

A. P$_d$ = 4 P$_s$

B. P$_d$ = 2.5 P$_s$

C. P$_d$ = 2 P$_s$

D. P$_d$ = 3 P$_s$

Correct Answer: A

Solved Example: 9090-03

The minimum pitch for an M16 bolt of grade 4.6 is? (UPPCL JE CE 2020)

A. 40

B. 18

C. 27

D. 50

Correct Answer: A

Solved Example: 9090-04

Fillet welds are designed to resist: (HPPSC AE Civil 2016 HPPTCL)

A. Tensile stress

B. Shear stress

C. Compressive stress

D. Torsional stress

Correct Answer: B

Solved Example: 9090-05

Design of pins is primarily governed by: (MPSC AE Civil Mains 2020 Paper I)

A. Shear

B. Bearing

C. Flexure

D. All of the above

Correct Answer: C