1. Which type of load is applied in tensile testing?
a) Axial load
b) Shear load
c) Transverse load
d) Longitudinal load
Explanation: An axial load is applied to the material to be tested when performing tensile testing and the load is applied axially to the body to be tested.
2. Given the cross sectional are as 4 m2, what will be the gauge length?
a) 12.3 m
b) 13 m
c) 11.3 m
d) 12 m
Explanation: The formula for gauge length (Lo) is Lo= 5.65* root over of Area of cross section. We know that under root 4 is 2, therefore 5.65*2 is equal to 11.3 m.
3. Which of the following does not affect the value of ultimate tensile strength?
a) Quality of surface finish
b) Speed of testing
c) Dimensional accuracy of the specimen
d) Length of the specimen
Explanation: The length of the specimen does not affect the value of ultimate tensile strength. While the quality of surface finish, speed of testing, dimensional accuracy of the specimen affect the value of ultimate tensile strength.
4. Which of the following is used to elongation in the material?
a) Clinometer
b) Extensiometer
c) Micrometer
d) Feeler gauge
Explanation: An extensiometer is a gauge which is attached to the specimen and it gives us the value of elongation in the body at a time. Feeler gauge and micrometer or clinometer cannot be used during the testing.
5. The yield limit of compression and the tensile test can be different for the same material.
a) True
b) False
Explanation: Titanium ( Ti ) is a material which shows different amount of yielding when subjected to tensile testing compared to when it is subjected to compressive testing.
6. An UTM can be used to conduct both tensile and compressive testing.
a) True
b) False
Explanation: A universal testing machine can be used to conduct tests like tension, compression, shear, friction, tear, stiffness. Many other such mechanical properties can be tested.
7. Which of the following factors do not affect the testing?
a) Temperature
b) Increase in number of axes for application of load
c) Fatigue
d) Pressure
Explanation: Increase in temperature and increase in the number of axes for load application can affect the testing results in a tensile or compressive test.
8. Which of the following cannot be determined using a torsion test?
a) Modulus of elasticity in shear
b) Torsion yield strength
c) Modulus of rupture
d) Young’s modulus
Explanation: Modulus of elasticity in shear, torsion yield strength and modulus of rupture can all be determined by performing torsion test on material
9. What is the use of weight head in a torsion testing equipment?
a) Holding the job only
b) Holding the job and applying twisting moment
c) Holding the job and measuring the twisting moment
d) It is not a part of torsion testing equipment
Explanation: The main job of weight head is to hold the job and measure the twisting moment.while twisting head holds the other end of job and applies twisting moment
10. Which of the following is used to measure how much the specimen is twisted?
a) Micrometer
b) Clinometer
c) Troptometer
d) None of the above
Explanation: Troptometer is an instrument which is used for measuring the angular distortion of the material. Mocrometer and vernier callipers are used to measure length. Tropometer measures amount of torsion for a bone.