Steel Structures Quiz Set-1

The forces acting on the web splice of a plate girder are

When the bolts are subjected to reversal of stresses, the most suitable type of bolt is

Diameter of a bolt hole is usually taken as

Bolts are most suitable to carry

Select the correct statement

Efficiency of a riveted joint, having the minimum pitch as per IS : 800, is

Minimum pitch of the rivets shall not be less than....

where d is gross diameter of rivet

Providing sufficient edge distance, which of the following failures of riveted joint can be avoided?

If the thickness of plate to be connected by a rivet is 16 mm, then suitable size of rivet as per Unwin's formula will be

As compared to field rivets, the shop rivets are

The difference between gross diameter and nominal diameter for the rivets up to 25 mm diameter is

Which of the following types of riveted joint is free from bending stresses?

When the axis of load lies in the plane of rivet group, then the most heavily loaded rivet will be the one which .....

Where, Fa is the load shared by each rivet due to axial load and Fm is the
shearing load due to moment in any rivet.

The external wind pressure acting on a roof depends on

The risk coefficient k, depends on

The basic wind speed is specified at a height 'h' above mean ground level in an open terrain. The value of 'h' is

For the buildings having a low permeability, the internal wind pressure acting normal to the wall and roof surfaces is taken as

Generally the purlins are placed at the panel points so as to avoid

To minimise the total cost of a roof truss, the ratio of the cost of truss to the cost of purlins shall be

Load factor is

The mechanism method of plastic analysis satisfies

Shape factor is a property which depends

The mechanism method and the statical method give

The elastic strain for steel is about

Study the following statements.
i) Top lateral bracing prevents the sidesway buckling of the chord.
ii) Sway bracing keeps the rectangular shape of the bridge cross-section.
iii) Sway bracing transfers the load from top of end posts to bearings.
The correct answer is

The portal bracing in a truss bridge is used to

The effect of racking forces is considered in the design of
i) lateral braces
ii) chord members
The correct answer is

The centrifugal force due to curvature of track is assumed to act on the bridge at a height of

If the floor is supported at or near the bottom but top chords of a bridge are not braced, then the bridge is called

If the loaded length of span in meters of a railway steel bridge carrying a single track is 6 m, then impact factor is taken as

Hudson's formula gives the dead weight of a truss bridge as a function of

The diameter of base of conical flare of a steel stack is ...

where d is the diameter of the cylindrical part

Maximum pitch of rivets, used in steel stacks, is limited to .....

where t is thickness of thinner plate being connected

Maximum pitch of rivets, used in steel stacks, is limited to .....

where t is thickness of thinner plate being connected

The maximum permissible span of asbestos cement sheets is

The range of economical spacing of trusses varies from

The maximum spacing of vertical stiffeners is ....

where d is the distance between flange angles

Rivets connecting flange angles to cover plates in a plate girder are subjected to

Bearing stiffeners are provided at
i) the supports
ii) the mid span
iii) the point of application of concentrated loads The correct answer is

Minimum spacing of vertical stiffeners is limited to .......

where d is the distance between flange angles

Gantry girders are designed to resist

The forces acting on the web splice of a plate girder are

Bearing stiffener in a plate girder is used to

Intermediate vertical stiffeners in a plate girder need be provided if the depth of web exceeds .........

where t is thickness of web

As per IS : 800, for compression flange, the out stand of flange plates should not exceed

The web crippling due to excessive bearing stress can be avoided by

Minimum thickness of web in a plate girder, when the plate is accessible and also exposed to weather, is

Horizontal stiffener in a plate girder is provided to safeguard against

Shear buckling of web in a plate girder is prevented by using

A tension member in the form of steel plate is to be Supported plates and rivets. Technical Name of these plates where question mark has been shown in figure

Economical depth of a plate girder corresponds to

The slenderness ratio of lacing bars should not exceed

The overlap of batten plates with the main members in welded connections should be more than

Battening is preferable when the

i) column carries axial load only
ii) space between the two main components is not very large
iii) column is eccentrically loaded The correct answer is

The effective length of a battened column is increased by

Angle of inclination of the lacing bar with the longitudinal axis of the column should preferably be between

Lacing bars in a steel column should be designed to resist

The use of tie plates in laced columns is

If the 20 mm rivets are used in lacing bars, then the minimum width of lacing bar should be

The best arrangement to provide unified behavior in built up steel columns is by

A beam curved in plan is designed for

Increase in the moisture content in concrete

Increase in the moisture content in concrete

In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively

The effect of creep on modular ratio is

According to ISI recommendations, the maximum depth of stress block for balanced section of a beam of effective depth d is

While designing the pile as a column, the end conditions are nearly

The critical section for finding maximum bending moment for footing under masonry wall is located

In a counterfort retaining wall, the main reinforcement is provided on the
i) bottom face in front counterfort
ii) inclined face in front counterfort
iii) bottom face in back counterfort
iv) inclined face in back counterfort
The correct answer is

The main reinforcement in the toe of a T- shaped R C. retaining wall is provided on
i) top face parallel to the wall
ii) top face perpendicular to the wall
iii) bottom face parallel to the wall
iv) bottom face perpendicular to the wall
The correct answer is

In counterfort type retaining walls
i) the vertical slab is designed as a continuous slab

ii) the heel slab is designed as a continuous slab
iii) the vertical slab is designed as a cantilever
iv) the heel slab is designed as a cantilever
The correct answer is

Which of the following R.C. retaining walls is suitable for heights beyond 6m?

Due to circumferential action of the spiral in a spirally reinforced column

The diameter of ties in a column should be

The load carrying capacity of a helically reinforced column as compared to that of a tied column is about

The minimum cover to the ties or spirals should not be less than

The minimum diameter of longitudinal bars in a column is

The limits of percentage p of the longitudinal reinforcement in a column is given by

For a slab supported on its four edges with corners held down and loaded uniformly, the Marcus correction factor to the moments obtained by Grashoff Rankine's theory

The main reason for providing number of reinforcing bars at a support in a simply supported beam is to resist in that zone

When shear stress exceeds the permissible limit in a slab, then it is reduced by

The average permissible stress in bond for plain bars in tension is

A higher modular ratio shows

The slab is designed as one way if the ratio of long span to short span is

In reinforced concrete footing on soil, the minimum thickness at edge should not be less than

Minimum thickness of load bearing RCC wall should be

Critical section for shear in case of flat slabs is at a distance of

A continuous beam is deemed to be a deep beam when the ratio of effective span to overall depth (1/D) is less than

Maximum distance between expansion joints in structures as per IS : 456 -1978 is

Minimum pitch of transverse reinforcement in a column is

Which of the following statements is incorrect ?

Which of the following statements is incorrect?

The percentage of reinforcement in case of slabs, when high strength deformed bars are used is not less than

The ratio of the diameter of reinforcing bars and the slab thickness is

For a longitudinal reinforcing bar in a column, the minimum cover shall neither be less than the diameter of bar nor less than

The minimum cover in a slab should neither be less than the diameter of bar nor less than

According to IS : 456- 1978, minimum slenderness ratio for a short column is

According to IS : 456-1978, the column or the strut is the member whose effective length is greater than

According to IS : 456-1978, the flexural strength of concrete is

Maximum quantity of water needed per 50 kg of cement for M 15 grade of concrete is

For concreting of heavily reinforced sections without vibration, the workability of concrete expressed as compacting factor should be

Minimum grade of concrete to be used in reinforced concrete as per IS:456-1978 is

If the permissible stress in steel in tension is 140 N/mm2, then the depth of neutral axis for a singly reinforced rectangular balanced section will be

If the depth of actual neutral axis in a beam is more than the depth of critical neutral axis, then the beam is called

Diagonal tension in a beam

For a reinforced concrete section, the shape of shear stress diagram is

Examine the following statements :
i) Factor of safety for steel should be based on its yield stress,
ii) Factor of safety for steel should be based on its ultimate stress,
iii) Factor of safety for concrete should be based on its yield stress,
iv) Factor of safety for concrete should be based on its ultimate stress.
The correct statements are

The factor of safety for

The fineness modulus of fine aggregate is in the range of

1% of voids in a concrete mix would reduce its strength by about

Poisson's ratio for concrete

In testing of fresh concrete to check the workability, the test which is carried out with the apparatus which is shown in the figure is called as-

Select the incorrect statement

Workability of concrete is inversely proportional to

Air entrainment in the concrete increases

Modulus of rupture of concrete is a measure of

The effect of adding calcium chloride in concrete is

i) to increase shrinkage
ii) to decrease shrinkage
iii) to increase setting time
iv) to decrease setting time
The correct answer is

As compared to ordinary Portland cement, high alumina cement has

The percentage of voids in cement is approximately

Admixtures which cause early setting, and hardening of concrete are called

Increase in the moisture content in concrete

Strength of concrete increases with