R4RIN – MCQs, Mock Tests | Agricultural Engineering Agricultural Engineering MCQs

The property by which a body returns to its original shape after removal of the force is called __________

1. Plasticity
2. Elasticity
3. Ductility
4. Malleability

✅ Correct Answer: 2

The property of a material by which it can be beaten or rolled into thin plates is called __________

1. Malleability
2. Plasticity
3. Ductility
4. Elasticity

✅ Correct Answer: 1

Which law is also called as the elasticity law?

1. Bernoulli’s law
2. Stress law
3. Hooke’s law
4. Poisson’s law

✅ Correct Answer: 3

The materials which have the same elastic properties in all directions are called __________

1. Isotropic
2. Brittle
3. Homogeneous
4. Hard

✅ Correct Answer: 1

A member which does not regain its original shape after removal of the load producing deformation is said __________

1. Plastic
2. Elastic
3. Rigid
4. None of the mentioned

✅ Correct Answer: 1

The body will regain it is previous shape and size only when the deformation caused by the external forces, is within a certain limit. What is that limit?

1. Plastic limit
2. Elastic limit
3. Deformation limit
4. None of the mentioned

✅ Correct Answer: 2

As the elastic limit reaches, tensile strain __________

1. Increases more rapidly
2. Decreases more rapidly
3. Increases in proportion to the stress
4. Decreases in proportion to the stress

✅ Correct Answer: 1

What kind of elastic materials are derived from a strain energy density function?

1. Cauchy elastic materials
2. Hypo elastic materials
3. Hyper elastic materials
4. None of the mentioned

✅ Correct Answer: 3

What the number that measures an object’s resistance to being deformed elastically when stress is applied to it?

1. Elastic modulus
2. Plastic modulus
3. Poisson’s ratio
4. Stress modulus

✅ Correct Answer: 1

The ability of a material to absorb energy when elastically deformed and to return it when unloaded is called __________

1. Elasticity
2. Resilience
3. Plasticity
4. Strain resistance

✅ Correct Answer: 2

The strain energy stored in a specimen when stained within the elastic limit is known as __________

1. Resilience
2. Plasticity
3. Malleability
4. Stain energy

✅ Correct Answer: 1

The maximum strain energy stored at elastic limit is __________

1. Resilience
2. Proof resilience
3. Elasticity
4. Malleability

✅ Correct Answer: 2

What is the modulus of resilience?

1. The ratio of resilience to volume
2. The ratio of proof resilience to the modulus of elasticity
3. The ratio of proof resilience to the strain energy
4. The ratio of proof resilience to volume

✅ Correct Answer: 4

The property by which an amount of energy is absorbed by material without plastic deformation is called __________

1. Toughness
2. Impact strength
3. Ductility
4. Resilience

✅ Correct Answer: 4

Resilience of a material plays important role in which of the following?

1. Thermal stress
2. Shock loading
3. Fatigue
4. Pure static loading

✅ Correct Answer: 2

Which of the following parameters can be obtained by tension test of a standard specimen?

1. Proportional Limit
2. Yield Strength
3. Percentage Reduction in area
4. All of the mentioned

✅ Correct Answer: 1

Proportional Limit is defined as the stress at which the stress strain curves begins to deviate from the straight line.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which of the following is the definition of Compliance?

1. Inverse of Rigidity
2. Inverse of Stiffness
3. Proportional to elastic Limit
4. None of the mentioned

✅ Correct Answer: 2

Yield strength is defined as the maximum stress at which a marked increase in elongation occurs without increase in________

1. Load
2. Strength
3. Toughness
4. Hardness

✅ Correct Answer: 1

For the materials which do not exhibit a well-defined yield points, the yield strength is defined as the stress corresponding to a permanent set of how much percentage of gauge length?

1. 0.1
2. 0.2
3. 0.3
4. 0.4

✅ Correct Answer: 2

Proof strength is defined as the stress which will produce a permanent extension of how much percentage in the gauge length of the standard test specimen.

1. 0.1
2. 0.2
3. 0.3
4. 0.4

✅ Correct Answer: 1

All engineering materials are plastic.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which of the following are true about plasticity?

1. Permanent Deformation
2. Ability to retain deformation under load or after removal of load
3. Plastic deformation is greater than elastic deformation
4. All of the mentioned

✅ Correct Answer: 4

Which of the following is measure of stiffness?

1. Modulus of elasticity
2. Modulus of plasticity
3. Resilience
4. Toughness

✅ Correct Answer: 1

Which of the following facts are true for resilience?

1. Ability of material to absorb energy when deformed elastically
2. Ability to retain deformation under the application of load or after removal of load
3. Ability of material to absorb energy when deformed plastically
4. None of the mentioned

✅ Correct Answer: 1

Modulus of resilience is defined as

1. Strain energy per unit volume
2. Strain energy per unit area
3. Independent of strain energy
4. None of the mentioned

✅ Correct Answer: 1

Which of the following are true for toughness

1. Ability of material to absorb energy before fracture
2. Measured by Izod & Charpy test
3. Decreases with the increase in temperature
4. All of the mentioned

✅ Correct Answer: 4

Malleability increases with temperature while ductility decreases with temperature.

1. True
2. False
3.
4.

✅ Correct Answer: 1

In which way, the notch decreases the tendency of brittle failure?

1. By producing high local stresses
2. By introducing triaxial tensile state of stress
3. By providing low local strain hardening and cracking
4. By creating a local magnification to the strain rate

✅ Correct Answer: 3

The fracture of material occurs when the flow curve _______________

1. is under the fracture curve
2. intersects the fracture curve
3. is parallel to fracture curve
4. is perpendicular to fracture curve

✅ Correct Answer: 2

Which of the following does not influence the ductile to the brittle transition of a material?

1. Stress state
2. Temperature
3. Strain rate
4. Shape of specimen

✅ Correct Answer: 4

In the case of 3-dimension state of stress, if one of the stress values, say, principal stress direction becomes compressive, the fracture stress reduces significantly.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The hydrostatic compressive state of stress __________ the fracture strength of the material.

1. increases
2. decreases
3. does not alter
4. no relationship

✅ Correct Answer: 1

The hydrostatic component of stress exerts no __________

1. shear stress
2. tensile stress
3. compressive stress
4. triaxial stress

✅ Correct Answer: 1

The Hydrostatic stress __________________ the dislocation pileup in the material.

1. increases
2. decreases
3. does not increase
4. sometimes increases and then decreases

✅ Correct Answer: 3

The hydrostatic stress influence the crack propagation but not the crack initiation.

1. True
2. False
3.
4.

✅ Correct Answer: 1

Which of the following is not among the basic condition responsible for causing the fracture of brittle?

1. A triaxle state of stress
2. Low temperature
3. High strain rate
4. Large sample width

✅ Correct Answer: 4

In both the Charpy and Izod impact testing, the load is applied from the backside on notch for causing fracture.

1. True
2. False
3.
4.

✅ Correct Answer: 2

The principle result in the impact test is the energy absorbed in the fracturing of the sample.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The nature of fracture in charpy test is not determine by __________

1. distance hammer travelled after impact
2. appearance of the fracture surface
3. the amount of energy absorbed
4. the type of loading

✅ Correct Answer: 4

Which of the following material has highest tendency for ductile to brittle transition?

1. FCC
2. HCP
3. BCC
4. DBTT does depends on crystal structure

✅ Correct Answer: 3

The fracture transition plastic (FTP) point is defined as __________

1. point where fracture is 100% brittle
2. point where fracture is 100% ductile
3. point where fracture is 50% brittle and 50% ductile
4. point above which the fracture is 100% ductile

✅ Correct Answer: 4

The fracture appearance transition temperature (FATT) point is defined as the _______

1. point where fracture is 100% brittle
2. point where fracture is 100% ductile
3. point where fracture is 50% brittle and 50% ductile
4. point above which the fracture is 100% ductile

✅ Correct Answer: 3

The nil ductility temperature (NDT) was used in world war-II for analysis of breaking ship. The NDT is defined as the ______

1. maximum temperature where fracture is 100% brittle
2. minimum temperature where fracture is 100% ductile
3. maximum Temperature where fracture is 50% brittle and 50% ductile
4. maximum Temperature above which the fracture is 100% ductile

✅ Correct Answer: 2

The necking begins when the ___________

1. true stress and engineering stress becomes equal
2. true strain and engineering strain becomes equal
3. the true strain becomes equal to the strain hardening coefficient
4. strain hardening coefficient becomes equal to an engineering strain

✅ Correct Answer: 3

The formation of necking produces the state of _________________

1. triaxle stress
2. biaxial stress
3. uniaxial stress
4. pure shear stress

✅ Correct Answer: 1

The crack growth in ductile material is by method of ______________

1. shearing
2. void coalescence
3. dislocation movement
4. impurity segregation

✅ Correct Answer: 2

The main cause of presence of dimple in ductile fracture surface is ___________

1. slip bands
2. impurity atoms
3. micro voids
4. corrosion

✅ Correct Answer: 3

The preferred sites for void formation are inclusions, second-phase particles, or the fine oxide particles, while in pure metals it is grain-boundary triple points.

1. True
2. False
3.
4.

✅ Correct Answer: 1

The ductility of true strain values _____________ with increase in second phase particles.

1. increases
2. decrease
3. remains constant
4. no relationship

✅ Correct Answer: 2