When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

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When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

A. Cd⁴/D³n

B. Cd⁴/2D³n

C. Cd⁴/4D³n

D. Cd⁴/8D³n

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First law of thermodynamics deals with

A. Conservation of heat

B. Conservation of momentum

C. Conservation of mass

D. Conservation of energy

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The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

A. Workdone

B. Entropy

C. Enthalpy

D. None of these

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The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

A. 0.086

B. 1.086

C. 1.086

D. 4.086

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The assumption made in Euler's column theory is that

A. The failure of column occurs due to buckling alone

B. The length of column is very large as compared to its cross-sectional dimensions

C. The column material obeys Hooke's law

D. All of the above

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When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is

A. Tensile stress

B. Compressive stress

C. Shear stress

D. Thermal stress

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The weakest section of a diamond riveting is the section which passes through

A. The first row

B. The second row

C. The central row

D. One rivet hole of the end row

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The throttling process is __________ process.

A. Reversible

B. Irreversible

C. Reversible or irreversible

D. None of these

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Tensile strength of a material is obtained by dividing the maximum load during the test by the

A. Area at the time of fracture

B. Original cross-sectional area

C. Average of (A) and (B)

D. Minimum area after fracture

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Shear modulus is the ratio of

A. Linear stress to linear strain

B. Linear stress to lateral strain

C. Volumetric strain to linear strain

D. Shear stress to shear strain

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A coil is cut into two halves, the stiffness of cut coil will be

A. Double

B. Half

C. Same

D. None of these

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When a body is subjected to biaxial stress i.e. direct stresses (σ_x) and (σ_y) in two mutually perpendicular planes accompanied by a simple shear stress (τ_xy), then minimum normal stress is

A. (σ_x + σ_y)/2 + (1/2) × √[(σ_x - σ_y)² + 4 τ²_xy]

B. (σ_x + σ_y)/2 - (1/2) × √[(σ_x - σ_y)² + 4 τ²_xy]

C. (σ_x - σ_y)/2 + (1/2) × √[(σ_x + σ_y)² + 4 τ²_xy]

D. (σ_x - σ_y)/2 - (1/2) × √[(σ_x + σ_y)² + 4 τ²_xy]

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The value of modulus of elasticity for mild steel is of the order of

A. 2.1 × 10⁵ kg/cm²

B. 2.1 × 10⁶ kg/cm²

C. 2.1 × 10⁷ kg/cm²

D. 0.1 × 10⁶ kg/cm²

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Which of the following statement is incorrect?

A. The liquid fuels consist of hydrocarbons.

B. The liquid fuels have higher calorific value than solid fuels.

C. The solid fuels have higher calorific value than liquid fuels.

D. A good fuel should have low ignition point.

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When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

A. Zeroth law of thermodynamics

B. First law of thermodynamics

C. Second law of thermodynamics

D. Kelvin Planck's law

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All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

A. Boyle's law

B. Charles' law

C. Gay-Lussac law

D. Joule's law

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The following cycle is used for air craft refrigeration

A. Brayton cycle

B. Joule cycle

C. Carnot cycle

D. Reversed Brayton cycle

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True stress strain-curve for materials is plotted between

A. Load/original cross-sectional area and change in length/original length

B. Load/ instantaneous cross-sectional area and loge (original area/ instantaneous area)

C. Load/ instantaneous cross-sectional area and change in length/ original length

D. Load/ instantaneous area and instantaneous area/original area

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The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.

A. Equal to

B. Less than

C. Greater than

D. None of these

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The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

A. 0.5 s.l.σ_t

B. s.l.σ_t

C. √2 s.l.σ_t

D. 2.s.l.σt

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The absolute zero pressure can be attained at a temperature of

A. 0°C

B. 273°C

C. 273 K

D. None of these

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When a thin cylindrical shell is subjected to an internal pressure, the volumetric strain is (where ε₁ = Hoop strain, and ε₂ = Longitudinal strain)

A. 2ε₁ - ε₂

B. 2ε₁ + ε₂

C. 2ε₂ - ε₁

D. 2ε₂ + ε₁

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A tri-atomic molecule consists of __________ atoms.

A. One

B. Two

C. Three

D. Four

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The property of a material by virtue of which a body returns to its original, shape after removal of the load is called

A. Plasticity

B. Elasticity

C. Ductility

D. Malleability

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Which of the following cycles is not a reversible cycle?

A. Carnot

B. Ericsson

C. Stirling

D. None of the above

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If the radius of wire stretched by a load is doubled, then its Youngs modulus will be

A. Doubled

B. Halved

C. Becomes four times

D. None of the above

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The compression ratio for Diesel engines is

A. 3 to 6

B. 5 to 8

C. 15 to 20

D. 20 to 30

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One kg of carbon produces __________ kg of carbon dioxide.

A. 3/7

B. 7/3

C. 11/3

D. 3/11

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When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.

A. Atomisation

B. Carbonisation

C. Combustion

D. None of these

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A material obeys hooks law up to

A. Plastic limit

B. Elastic limit

C. Yield point

D. Limit of proportionality

Discuss this answer

Proof resilience per material is known as

A. Resilience

B. Proof resilience

C. Modulus of resilience

D. Toughness

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Accepted Answer

D. Cd⁴/8D³n

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

Correct Answer :

Show all Strength of Materials MCQ

Related Questions

First law of thermodynamics deals with

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

The assumption made in Euler's column theory is that

When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is

The weakest section of a diamond riveting is the section which passes through

The throttling process is __________ process.

Tensile strength of a material is obtained by dividing the maximum load during the test by the

Shear modulus is the ratio of

A coil is cut into two halves, the stiffness of cut coil will be

When a body is subjected to biaxial stress i.e. direct stresses (σ_x) and (σ_y) in two mutually perpendicular planes accompanied by a simple shear stress (τ_xy), then minimum normal stress is

The value of modulus of elasticity for mild steel is of the order of

Which of the following statement is incorrect?

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

The following cycle is used for air craft refrigeration

True stress strain-curve for materials is plotted between

The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

The absolute zero pressure can be attained at a temperature of

When a thin cylindrical shell is subjected to an internal pressure, the volumetric strain is (where ε₁ = Hoop strain, and ε₂ = Longitudinal strain)

A tri-atomic molecule consists of __________ atoms.

The property of a material by virtue of which a body returns to its original, shape after removal of the load is called

Which of the following cycles is not a reversible cycle?

If the radius of wire stretched by a load is doubled, then its Youngs modulus will be

The compression ratio for Diesel engines is

One kg of carbon produces __________ kg of carbon dioxide.

When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.

A material obeys hooks law up to

Proof resilience per material is known as

Also checkout

When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the stiffness of the spring is given by

Correct Answer :

Show all Strength of Materials MCQ

Related Questions

First law of thermodynamics deals with

The sum of internal energy (U) and the product of pressure and volume (p.v) is known as

The ratio of root mean square velocity to average velocity of gas molecules at a particular temperature is

The assumption made in Euler's column theory is that

When a bar is subjected to a change of temperature and its deformation is prevented, the stress induced in the bar is

The weakest section of a diamond riveting is the section which passes through

The throttling process is __________ process.

Tensile strength of a material is obtained by dividing the maximum load during the test by the

Shear modulus is the ratio of

A coil is cut into two halves, the stiffness of cut coil will be

When a body is subjected to biaxial stress i.e. direct stresses (σx) and (σy) in two mutually perpendicular planes accompanied by a simple shear stress (τxy), then minimum normal stress is

The value of modulus of elasticity for mild steel is of the order of

Which of the following statement is incorrect?

When two bodies are in thermal equilibrium with a third body, they are also in thermal equilibrium with each other. This statement is called

All perfect gases change in volume by 1/273th of its original volume at 0°C for every 1°C change in temperature, when the pressure remains constant. This statement is called

The following cycle is used for air craft refrigeration

True stress strain-curve for materials is plotted between

The maximum tangential stress in a thick cylindrical shell is always _________ the internal pressure acting on the shell.

The tensile strength of the welded joint for double fillet is (where s = Leg or size of the weld, l = Length of weld, and σt = Allowable tensile stress for weld metal)

The absolute zero pressure can be attained at a temperature of

When a thin cylindrical shell is subjected to an internal pressure, the volumetric strain is (where ε₁ = Hoop strain, and ε₂ = Longitudinal strain)

A tri-atomic molecule consists of __________ atoms.

The property of a material by virtue of which a body returns to its original, shape after removal of the load is called

Which of the following cycles is not a reversible cycle?

If the radius of wire stretched by a load is doubled, then its Youngs modulus will be

The compression ratio for Diesel engines is

One kg of carbon produces __________ kg of carbon dioxide.

When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel, the process is known as __________ of fuel.

A material obeys hooks law up to

Proof resilience per material is known as

Also checkout

When a body is subjected to biaxial stress i.e. direct stresses (σ_x) and (σ_y) in two mutually perpendicular planes accompanied by a simple shear stress (τ_xy), then minimum normal stress is