steel sample quiz 13/06/2025

By providing sufficient edge distance, which

of the following failures of riveted joint can be

avoided?

• Tension failure of the plate

• Shear failure of the rivet

• Shear failure of the plate

• Crushing failure of the rivet

Answer explanation

Shear failure of plates

 If the maximum shear stress in the connection exceeds the shear strength of the plate but less than shear strength of the bolt then shear failure of plate occurs. This failure is generally observed when the bolts are placed at a lesser edge or end distance

Failure by block shear at an end connection of

a plate involves:

• Shear along two planes, tension along two

  planes

• Shear along one planes, tension along two

  planes

• Shear along two planes, tension along one plane

• Shear along one plane, tension along one

  plane

Answer explanation

Block Shear Failure

Block shear failure is Combined tension-shear failure i.e. failure plane includes both tension (Normal to the force) and shear (Parallel to the force) failure planes.

It is a failure in which a block of a member is torn out around the bolt holes in the Periphery.

When two plates are placed end to end and are

joined by two cover plates, the join is known as

• Lap joint

• Butt joint

• Chain riveted lap joint

• Double cover butt joint

Answer explanation

Lap Joint – Two plates placed one above other and connected in this overlap

Butt Joint – Two plates placed end to end and connected by a cover plate

A rivet will be in double shear if the joints is

• Double riveted lap joint

• Single cover single rivetted butt joint

• Double cover single revetted butt joint

• Single rivetted lap joint

Answer explanation

LAP JOINT

Single shearing plane

BUTT JOINT

Load on connection is not eccentric for

• Lap joint

• Single cover butt joint

• Double cover butt joint

• All the above

Answer explanation

In a double-riveted double-covered butt

joint, the strength of the joint per length in

shearing the rivets is n times the shear

strength of one rivet in single shear, where

'n' is equal to

• 1

• 2

• 3

• 4

Answer explanation

A 6 mm thick mild steel plate is connected

to an 8 mm thick plate by 16 mm diameter

shop rivets. What is the number of rivets

required to carry an 80 kN load?

( Lap joint, Permissible stress in shearing = 100Mpa, Permissible stress in Bearing = 300 Mpa )

• 2

• 3

• 4

• 6

Answer explanation

What is the ratio of the yield stress in power driven shop rivets relative to the permissible bearing stress of mild steel? 

• 1.0

• 0.8

• 0.6

• 0.4

Answer explanation

For field rivets, the permissible stresses are

reduced by what percentage?

• 10%

• 15%

• 25%

• 33.33%

Answer explanation

Identify the most effective butt joint (with

double cover plates) for a plate in tension

from the patterns (plan view) shown below,

each comprising .6 identical bolts with the

same pitch and gauge :

• 
• 
• 
• 

Answer explanation

 Diamond bolting is more effective than chain bolting because only one bolt hole is deducted at critical section so tensile strength is maximum