Free Printable Understanding Stress and Strain Concepts

1.

What is the equation for Stress?

a)

$Stress = \frac{A}{F}$

b)

$Stress = \frac{F}{A}$

c)

$Stress = F \times A$

d)

$Stress = A - F$

2.

What are the US Units for Stress?

a)

N/m²

b)

lb/in²

c)

kg/m²

d)

lb/ft²

3.

What is the SI Unit for Stress?

a)

lb/in²

b)

N/m²

c)

kg/m²

d)

N/cm²

4.

What are the US units for Force?

a)

N

b)

kg

c)

lbf

d)

lb

5.

What are the SI units for Force?

a)

lb

b)

N

c)

kg

d)

lbf

6.

What are the US units for Area?

a)

m²

b)

cm²

c)

in²

d)

ft²

7.

What is the SI unit for Area?

a)

m²

b)

ft²

c)

in²

d)

cm²

8.

What are the US units for mass?

a)

kg

b)

lb

c)

g

d)

oz

9.

What is the SI unit for mass?

a)

lb

b)

g

c)

kg

d)

oz

10.

What are the units for Strain?

a)

N/m²

b)

lb/in²

c)

Unitless

d)

m²

11.

What are the units for Young's Modulus?

a)

Same as Force

b)

Same as Stress

c)

Unitless

d)

Same as Area

12.

Which of the following is a unit of Force in the SI system?

a)

lb

b)

N

c)

kg

d)

m

13.

Which of the following is a unit of Area in the US system?

a)

m²

b)

cm²

c)

ft²

d)

mm²

14.

Which of the following is a unit of mass in the SI system?

a)

lb

b)

oz

c)

kg

d)

g

15.

Which of the following is a unit of Stress in the SI system?

a)

lb/in²

b)

N/m²

c)

kg/m²

d)

lb/ft²

16.

N/m^2 is the same as?

a)

Pa

b)

what?

c)

psi

d)

pick number 3 my lord

17.

lb/in^2 is the same as?

a)

Pa

b)

what?

c)

psi

d)

pick number 3 my lord

18.

If a material has a cross-sectional area of 5 square meters and subjected to a normal force of 20 N, which of the following is the stress?

a)

4 Pa

b)

25 Pa

c)

0.4 Pa

d)

15 Pa

19.

How is strain calculated?

a)

Number of sleepless nights divided by number of cups of coffee

b)

Divide load (F) by the original test sample cross-sectional area (A₀).

c)

Change in Length (ΔL) under load divided by the original Length (L₀)

d)

Stress (σ) divided by strain (ε)

20.

A 58in long steel rod has a cross-sectional area of 0.025in^2. The rod is a part of a vertical support that holds a heavy 1238 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

Solve for Stress

a)

49520 psi

b)

49520 Pa

c)

48520 lbs

d)

48520psi

21.

A 58in long steel rod has a cross-sectional area of 0.055in^2. The rod is a part of a vertical support that holds a heavy 1285 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

Solve for Stress

a)

49520 psi

b)

49520 Pa

c)

23363.64 psi

d)

23363.64 Pa

22.

A 58in long steel rod has a cross-sectional area of 0.035in^2. The rod is a part of a vertical support that holds a heavy 1238 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

stress =35371.43psi
Solve for Strain

a)

0.0012in

b)

0.0012

c)

0.0014in

d)

0.0014

23.

A 58in long steel rod has a cross-sectional area of 0.035in^2. The rod is a part of a vertical support that holds a heavy 1238 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

stress =66370.45psi
Solve for Strain

a)

0.0014in

b)

0.0026

c)

0.0026in

d)

0.0014

24.

A 58in long steel rod has a cross-sectional area of 0.035in^2. The rod is a part of a vertical support that holds a heavy 1238 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

Strain =0.0016psi
Solve for Elongation (ΔL)

a)

0.092

b)

0.093

c)

0.092in

d)

0.093in

25.

A 73in long steel rod has a cross-sectional area of 0.035in^2. The rod is a part of a vertical support that holds a heavy 1238 lbs that hangs attached to the rod’s lower end. Ignoring the weight of the rod, what is the stress in the rod and the elongation (change in length) of the rod under the stress knowing E= 29,000,000 psi for steel.

Strain =0.05psi
Solve for Elongation (ΔL)

a)

3.65in

b)

3.65psi

c)

3.65

d)

3.65in^2

Understanding Stress and Strain Concepts

Total questions: 25

Worksheet time: 15mins

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