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Prestressed Concrete Structures
1000 Mechanical Behaviour Testing Materials
Quiz 1
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Q.1
With an increase in strain rate, ductility ______ and tensile strength _____
a) Decreases, decreases
b) Decreases, increases
c) Increases, increases
d) Increases, decreases
Q.2
Largest size flaw can be determined using which of the following test?
a) Shore test
b) Brinell test
c) Leeb test
d) NDT
Q.3
Yield and flow strength at lower plastic strain is more dependent on _____ than ______
a) Strain rate, temperature
b) Temperature, tensile strength
c) Tensile strength, strain rate
d) Strain rate, tensile strength
Q.4
R-curve behaviour is a material related property.
a) False
b) True
Q.5
Which of the following machine is used to measure compressive strength?
a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine
Q.6
Which of the following instrument is used to measure formability?
a) Universal testing machine
b) Impact testing machine
c) Fatigue testing machine
d) Erichsen machine
Q.7
Which of the following device is used to measure hardness in Mohs?
a) Rockwell tester
b) Sclerometer
c) Universal testing machine
d) Gyro meter
Q.8
What is the cross-section of standard specimen for impact testing?
a) 10mm × 10mm
b) 20mm × 60mm
c) 10mm × 40mm
d) 45mm × 60mm
Q.9
Which of the following test is more preferred for testing hardness of electroplated surface?
a) Microhardness test
b) Dynamic hardness test
c) Macro hardness test
d) Scratch hardness test
Q.10
Which of the following is a drawback of ultrasonic testing?
a) Shape restriction
b) Low depth
c) Higher errors
d) High sensitivity
Q.11
Is ultrasonic testing is destructive testing?
a) False
b) True
Q.12
Which of the following factor affects ductile-brittle transition behavior the most?
a) Triaxiality
b) Notching
c) Temperature
d) Strain rate
Q.13
Which of the following material shows a gradual rising R-curve with failure governed by R-curve behaviour?
a) Low toughness and strength
b) High toughness and strength
c) Low toughness / strength
d) High toughness / low strength
Q.14
The slope of the stress-strain curve in the plastic range is _____
a) Bauschinger effect
b) Resolved shear stress
c) True strain
d) Rate of strain hardening
Q.15
At strain rates _____ behaviour of the material is characterized by creep.
a) High, 104 per second
b) High, 10-4 per second
c) Low, 104 per second
d) Low, 10-4 per second
Q.16
Radiography don’t give ________
a) Pores in weldment
b) Blow holes in casting
c) Hardness
d) Thickness of material
Q.17
ECI is only used for ferromagnetic materials.
a) False
b) True
Q.18
Standard penetration depth varies from material to material.
a) False
b) True
Q.19
Which of the following material can’t be tested by MPI?
a) Mg
b) Fe
c) Co
d) Ni
Q.20
What is the Curie point for most of the ferrous magnetic materials?
a) 460˚C
b) 760˚C
c) 240˚C
d) 557˚C
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