Mechanical Properties of Solids - Online Test

Mechanical Properties of Solids TEST : 3

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q1. For a bar of length l, breadth b, and depth d as shown in figure the deflection

δ

is given by

A. δ=Wl3/(4bd2Y)

B. δ=Wl2/(4bd3Y)

C. δ=Wl3/(4bd3)

D. δ=Wl3/(4bd3Y)

Answer : Option D
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q2. Rectangular section is rarely used in beams because

A. more material in kilos is required

B. stresses are uniform in a rectangular section

C. less material in kilos is required

D. stresses are always plastic in rectangular section

Answer : Option A
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q3. Columns are loaded in

A. shear

B. compression

C. tension

D. hydraulic stress

Answer : Option B
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q4. Material is said to be ductile if

A. material cross section is not significantly reduced at failure

B. material breaks suddenly at little elongation

C. fracture occurs soon after the elastic limit is passed

D. a large amount of plastic deformation takes place between the elastic limit and the fracture point

Answer : Option D
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q5. Material is said to be brittle if

A. fracture occurs soon after the elastic limit is passed

B. a large amount of plastic deformation takes place between the elastic limit and the fracture point

C. material cross section is significantly reduced at failure

D. material elongates a lot before finally breaking

Answer : Option A
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q6.

A steel wire of length 4.7 m and cross-sectional area 3.0

\times

1 0^{- 5}

m^{2}

stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of 4.0

\times

1 0^{- 5}

m^{2}

under a given load. What is the ratio of the Young’s modulus of steel to that of copper?

A. 2.0

B. 1.6

C. 1.2

D. 1.8

Answer : Option D
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q7. Figure shows the strain-stress curve for a given material. What is the Young’s modulus?

A. 3.6

\times

1 0^{8}

N / m^{2}

B. 3.2

\times

1 0^{8}

N / m^{2}

C. 3.4

\times

1 0^{8}

N / m^{2}

D. 3.0

\times

1 0^{8}

N / m^{2}

Answer : Option D
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q8. Figure shows the strain-stress curve for a given material. What is the approximate yield strength for this material?

A. 3.2

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108 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> 108

N / m 2 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> N / m 2

B. 3.6

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108 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> 108

N / m 2 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> N / m 2

C. 3.0

\times " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> \times

108 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> 108

N / m 2 " role="presentation" style="display: inline; line-height: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); position: relative; font-size: 13px; font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif;"> N / m 2

D. 3.4

\times " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> \times

108 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> 108

N / m 2 " role="presentation" style="display: inline; line-height: normal; font-size: 13px; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; color: rgb(33, 33, 33); font-family: "Open Sans", "Helvetica Neue", Helvetica, Arial, sans-serif; position: relative;"> N / m 2

Answer : Option C
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q9.

A steel rod 2.0 m long has a cross-sectional area of 0.30

c m^{2}

. It is hung by one end from a support, and a 550-kg milling machine is hung from its other end. Determine the stress on the rod.

A. 1.2

\times

1 0^{8}

B. 1.4

\times

1 0^{8}

C. 1.8

\times

1 0^{8}

D. 1.6

\times

1 0^{8}

Answer : Option C
Explaination / Solution:
No Explaination.

# Mechanical Properties of Solids # CBSE 11TH PHYSICS Prepare / Learn

Q10.

A steel rod 2.0 m long has a cross-sectional area of 0.30

c m^{2}

. It is hung by one end from a support, and a 550-kg milling machine is hung from its other end. Determine the resulting strain

A. 7.0

\times

1 0^{- 4}

B. 9.0

\times

1 0^{- 4}

C. 8.0

\times

1 0^{- 4}

D. 10.0

\times

1 0^{- 4}

Answer : Option B
Explaination / Solution:
No Explaination.

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