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Eng L3 Stress/Strain

Total questions: 20

Worksheet time: 13mins

Name
Class
Date
1.

What is Hookes law?

a)

Extension is directly proportional to length

b)

Extension is directly proportional to force applied

c)

Extension is inversly proportional to force applied

d)

Peter Pan isn't nice

2.

Denisty it measured in what units?

a)

kgm3kgm^3

b)

kg2mkg^2m

c)

kgm3kgm^{-3}

d)

yardsinch\frac{yards}{inch}

3.

Tensile (a)   is force applied per the perpendicular cross sectional area

4.

Tensile (a)   is a measure of how much a material stretches under a direct force

5.

A brittle material is one which:

a)

Doesn't deform plastically but breaks when the stress is too high

b)

Deforms plastically

c)

Deforms elastically and will return to its original shape

d)

Deforms to a new shape with little force

6.

The elastic limit is the force above which a material will (a)  

7.

Area under a force-extension graph represents

(a)  

8.

What is Young's Modulus?

a)

StressStrain\frac{Stress}{Strain}

b)

StrainStress\frac{Strain}{Stress}

c)

LΔLA\frac{L}{\Delta LA}

d)

\sqrt{\infty}

9.

How do you find the Young's Modulus from a stress-strain graph?

a)

Area under the line

b)

Gradient of the line

c)

Integral of the line

d)

ΔxΔy\frac{\Delta x}{\Delta y}

10.

Which graph represents a wire which has plastically deformed?

a)

Left graph

b)

Right graph

11.

Where is the ultimate tensile strength on a stress-strain graph?

a)

The lowest point

b)

The highest point

c)

The furthest right

d)

The furthest left

12.

The symbol used to represent direct stress is?

a)
τ
b)
δ
c)
θ
d)
σ
13.

The symbol used to measure direct strain is?

a)
λ
b)
δ
c)
σ
d)
ε
14.

The unit of direct stress is?

a)
Meters per second
b)
Pascals (Pa) or Newtons per square meter (N/m^2)
c)
Kilograms per square meter
d)
Joules per cubic meter
15.

The unit of direct strain is?

a)
Kilograms
b)
Dimensionless
c)
Meters
d)
Radians
16.

The modulus of elasticity (or Young's modulus) is measured in?

a)
Kilograms (kg)
b)

Metres (m)

c)

Newtons (N)

d)

Pascals or Newtons per square metre (Pa)

17.

Length is measured in?

a)
inches
b)
liters
c)
grams
d)

metres

18.

Force is measured in?

a)
Kilograms
b)
Meters
c)
Joules
d)
Newtons (N)
19.

The SI unit for Area is?

a)
square meters (m^2)
b)
liters (L)
c)
cubic meters (m^3)
d)
square centimeters (cm^2)
20.

I feel confident with this topic

a)

True

b)

False