STD: QUESTION BANK

Long Column

Timber column with a square cross-section of 150x150mm and length of 2.5m. It is hinged at the ends so that K=0.8. Is the column short, intermediate or long?

10.2569 mPa

Timber column with a square cross-section of 150x150mm and length of 2.5m. It is hinged at the ends so that K=0.8. What is the allowable axial load of the column?

230,841 N or 230.84 kN

Timber column with a square cross-section of 150x150mm and length of 2.5m. It is hinged at the ends so that K=0.8. What is the allowable compressive stress of the column?

Steel

A material used long before Renaissance Period, however it was not popular as a building material due to inefficient production methods.

Roads

Which of the following is not a common use of steel?

Warm Pressed

Which of the following is not a type of structural steel?

Cold Formed

It is made by rolling or pressing thin gauges of steel into pre-determined shapes.

Built-up Section

It is made by welding together standard shapes to create desired section.

Strain Hardening

A strain range where increase in strain is accompanied by a significant increase in

stress.

Ductility

An important property of steel which allows absorption and redistribution of stresses in continuous members and at points of high local stress caused by external forces.

109.65mm

Determine the ideal depth of a rectangular column if it uses 80% stress Grade Narra, with compression Parallel to Grain of 11.4 MPa, and its width is 100mm. The column is expected to support 125kN axial load.

127.41mm

A 80% stress Grade Molave, with compression Parallel to Grain of 15.4MPa is used as a square column. This column will support an axial load of 250kN. If the height of the column is 4.0 meters, with both ends assumed to be fixed, compute the trial section of

the column. E= 6.54x103 MPa.

Long, K < < 50 is true

A 80% stress Grade Molave, with compression Parallel to Grain of 15.4MPa is used as a square column. This column will support an axial load of 250kN. If the height of the column is 4.0 meters, with both ends assumed to be fixed, determine if the column is

short, intermediate, or long. E= 6.54x103 MPa.

Cold Rolled

Cold Formed

Cold Pressed

A type of structural steel that is made by rolling or pressing thin gauges of

steel into predetermined shapes.

Carbon Steel

A class of structural steel that can yield strength of 36-50 ksi (A36- A50).

Strain Hardening

Within what range of strain does an increase in strain coincide with a

significant increase in stress.

Bessemer Process

It was introduced in the mid-19th century which made steel inexpensive and mass production possible.

Over 930°C

At what temperature is raw steel (steel billets) typically roll-pressed during

the hot rolling process?

150 mm x 150 mm

A Square Molave Column with 80% stress grade has a compression parallel to grain of 15.40 MPa. It needs to support an axial load of 278 KN. The Modulus of Elasticity is 6.54 x10^3 MPa. The height of the column is 4 meters and the end condition is assumed to be Pin-to-Pin connection. What will be the size of the column in mm?

Long

A Square Molave Column with 80% stress grade has a compression parallel to grain of 15.40 MPa. It needs to support an axial load of 278 KN. The Modulus of Elasticity is 6.54 x10^3 MPa. The height of the column is 4 meters and the end condition is assumed to be Pin-to-Pin connection. Is it Short, Intermediate or Long?

3.08438 MPa

A Square Molave Column with 80% stress grade has a compression parallel to grain of 15.40 MPa. It needs to support an axial load of 278 KN. The Modulus of Elasticity is 6.54 x10^3 MPa. The height of the column is 4 meters and the end condition is assumed to be Pin-to-Pin connection. Determine the actual computed stress (F'C) on the column.

0.30

What is the typical range of the ratio of transverse to longitudinal strain for most common metals in the elastic range?

Stress increases due to dislocation interactions and strain hardening

When analyzing strain hardening in a tensile test, which of the following correctly describes the relationship between true stress and true strain beyond the yield point?

Short Curing Time

Which, among the following, is not considered an advantage in using Structural Steel as a building material?

50 to 75 ksi

What is the yield strength range of Heat Treated Carbon/HSLA Steel?

0.3mm to 6mm

What is the typical range of thickness for Cold-Formed Steel sections?

Hot Rolled

This type of structural steel use steel billets roll-pressed at more than 930 deg. C to produce shapes such as angle bars and flat plates.

High Compression Strength

Which among the following is NOT an advantage of structural steel?

Cold Formed

What type of structural steel is made by rolling or pressing thin gauges of steel into pre-determined shapes?

0.30

What is the Poisson's Ratio in the elastic range for structural steel?

Heat Treated Construction Alloy Steel

Which of the structural steel classes requires a yield strength of no less than 100 ksi?

W = 250 mm, L = 125 mm

A rectangular timber column made of 80% stress grade Agoho is required to support an axial load of 300 kN. The allowable compressive strength parallel to the grain is 14.5 MPa, and the modulus of elasticity (E) is 8.22 × 10³ MPa. Determine the required cross-sectional shop dimensions, assuming the column has a width-to-thickness ratio of 2:1.

LONG; 31.953

A rectangular timber column made of 80% stress grade Agoho is required to support an axial load of 300 kN. The allowable compressive strength parallel to the grain is 14.5 MPa, and the modulus of elasticity (E) is 8.22 × 10³ MPa. If the column has a height of 5 m with fixed-fixed end conditions, classify the column as short, intermediate, or long and determine the slenderness ratio based on the computed section

SAFE; 2.414 mPa

A rectangular timber column made of 80% stress grade Agoho is required to support an axial load of 300 kN. The allowable compressive strength parallel to the grain is 14.5 MPa, and the modulus of elasticity (E) is 8.22 × 10³ MPa. Determine if the previously computed section of the column is still safe and the F'c to prove so.

178.41mm

A 80% stress grade Yakal circular column with a height of 4m is needed to carry an axial load of 500kN. If the column has a compressive stress of 20mPa and both end conditions are fixed determine the diameter of column.

SAFE; 1.36x10^3

A 80% stress grade Yakal circular column with a height of 4m is needed to carry an axial load of 500kN. If the column has a compressive stress of 20mPa and both end conditions are fixed determine if the column is Short, Intermediate, or Long.

Rolled Shapes

A type of structural steel that is produced by passing red-hot blooms or billet steel through rolls until the desired shape is attained

Yield Point, Yield Strength

The stress corresponding to a specified deviation from perfectly plastic behavior.

High Strength Low Alloy Steels (HSLA)

Which class of structural steel has a yield strength greater than 40 ksi and achieves its strength without heat treatment?

136.04 mm

A beam made from 80% stress grade molave is designed to support an axial load of 190 kN. With a compression of 15.4MPa, parallel to the grain, what will the depth be if d=1.5b?

79.56 mm

A square column is required to support an axial load of 100 kN. The material has a compression parallel to grain of 15.8 MPa, and the stress grade is 80% of the Yakal grade. What will be the required size of the column?

17.18 mm, Long

A square timber column made of Narra is designed to support an axial load of 200 kN. The estimated allowable compression parallel to the grain is 11.4 MPa, and the estimated modulus of elasticity (E) is 5.94 × 10³ MPa. Consider the height of the column to be 3.5m, with its end conditions assumed to be fixed. Determine the slenderness ratio (Le/d) and classify the column as short, intermediate, or long.

Elastic Range

It is a strain range that has no permanent deformation.

Low Tensile strength, High resistance to Compression

Given below are the advantages of Structural Steel, which of the following does not belong to the group?