Machine Design Interview Questions with Answers
Question: 1. Define Ductility?
Answer:
It is the assets of the material allowing it to be drawn into wire, with the utility of tensile pressure. It have to be both strong and plastic. It is commonly measured in phrases of percent elongation and reduction in vicinity, (e.G.) Ni, Al, and Cu.
Question: 2. Define Fatigue?
Answer:
When a fabric is subjected to repeated stress, it fails at stresses below the yield factor stress; such sort of failure of the material is called fatigue.
AutoCAD Interview Questions
Question: 3. Define Factor Of Safety?
Answer:
The ratio between most stresses to running strain is known as thing of safety.
Factor of safety = Maximum pressure /Working pressure
Question: 4. Define Endurance Limit?
Answer:
Endurance restrict is the most value of completely reversed pressure that the usual specimen can maintain an countless quantity (106) of cycles without failure.
Question: 5. What Is Impact Load?
Answer:
If the time of load application is less than one 1/3 of the bottom herbal length of vibration of the part, it is called an effect load.
Solid Edge Interview Questions
Question: 6. What Are The Various Phases Of Design Process?
Answer:
The various levels of layout process are:
Recognition of want.
Definition of trouble
Synthesis
Analysis and optimization
Evaluation
Presentation
Question: 7. What Are The Different Types Of Loads That Can Act On Machine Components?
Answer:
Different loads on machine additives are:
Steady load.
Variable load.
Shock load
Impact load.
Mechanical Engineering Interview Questions
Question: eight. What Are The Factors Affecting Endurance Strength?
Answer:
Factors affecting endurance energy are
Load ii. Surface finish
Size
Temperature
Impact
Reliability
Question: 9. What Are The Types Of Variable Stresses?
Answer:
Types of variable stresses are:
Completely reversed or cyclic stresses
Fluctuating stresses
Repeated stresses
Drawing and Painting Interview Questions
Question: 10. Differentiate Between Repeated Stress And Reversed Stress?
Answer:
Repeated pressure refers to a stress varying from 0 to a maximum cost of equal nature.
Reversed strain of cyclic strain varies from one cost of anxiety to the same cost of compression.
Question: eleven. What Are The Types Of Fracture?
Answer:
The types of fracture are
Ductile fracture
Brittle fracture
3D Animation Interview Questions
Question: 12. Distinguish Between Brittle Fracture And Ductile Fracture?
Answer:
In brittle fracture, crack boom is as much as a small intensity of the material.
In ductile fracture large amount of plastic deformation is gift to a higher intensity.
AutoCAD Interview Questions
Question: thirteen. Define Stress Concentration And Stress Concentration Factor?
Answer:
Stress concentration is the boom in nearby stresses at factors of rapid exchange in go segment or discontinuities.
Stress attention aspect is the ratio of maximum stress at essential section to the nominal strain.
Question: 14. Explain Size Factor In Endurance Strength?
Answer:
Size issue is used to take into account the effect of the dimensions on staying power power. A large length item may have greater defects as compared to a small one. So, patience energy is reduced. If K is the scale element, then
Actual persistence energy = Theoretical endurance limit x K
Question: 15. Explain Griffith Theory. (or) State The Condition For Crack Growth?
Answer:
A crack can propagate if the power launch rate of crack is more than crack resistance.
Solid Works Interview Questions
Question: 16. What Are The Modes Of Fracture?
Answer:
The exceptional the modes of fractures are:
Mode I (Opening mode) – Displacement is everyday to crack surface.
Mode II (Sliding mode) – Displacement is inside the plane of the plate.
Mode III (Tearing mode) – Out of aircraft shear.
Question: 17. What Are The Factors To Be Considered In The Selection Of Materials For A Machine Element?
Answer:
While choosing a material for a gadget detail, the following factors are to be considered
Required material homes
Manufacturing ease
Material availability
Cost
Thermodynamics Interview Questions
Question: 18. What Are Various Theories Of Failure?
Answer:
The failure theories are:
Maximum essential pressure principle.
Maximum shear strain principle.
Maximum main strain concept.
Solid Edge Interview Questions
Question: 19. List Out The Factors Involved In Arriving At Factor Of Safety?
Answer:
The factors concerned in arriving at issue of protection are:
Material properties
Nature of masses
Presence of localized stresses
Mode of disasters
Question: 20. Give Some Methods Of Reducing Stress Concentration?
Answer:
Some of the strategies are:
Avoiding sharp corners.
Providing fillets.
Use of a couple of holes as opposed to single hollow
Undercutting the shoulder elements.
Machine getting to know Interview Questions
Question: 21. Explain Notch Sensitivity. State The Relation Between Stress Concentration Factor And Notch Sensitivity?
Answer:
Notch sensitivity (q) is the degree to which the theoretical impact of strain concentration is honestly reached.
The relation is, Kf = 1 + q (Kt-1)
Question: 22. What Are The Factors That Affect Notch Sensitivity?
Answer:
The factors effecting notch sensitivity are:
Material
Notch radius
Size of thing
Type of loading
Grain Structure
Question: 23. What Is The Use Of Goodman & Soderberg Diagrams?
Answer:
They are used to resolve the issues of variable stresses.
CATIA Interview Questions
Question: 24. Define Mach Inability?
Answer:
It is the belongings of the cloth, which refers to a relative ease with which a material may be reduce. It is measured in some of ways including comparing the tool existence for reducing special cloth.
Mechanical Engineering Interview Questions
Question: 25. What Is An S-n Curve?
Answer:
N curve has fatigue pressure on ‘Y’ axis and variety of loading cycles in ‘X’ axis. It is used to locate the fatigue strain cost similar to a given wide variety of cycles.
Question: 26. What Is Curved Beam?
Answer:
In curved beam the neutral axis does no longer coincide with the centroidal axis.
Electrical Machines Interview Questions
Question: 27. Give Some Example For Curved Beam?
Answer:
C frame, crane hook.
Drawing and Painting Interview Questions
Question: 28. What Is Principle Stress And Principle Plane?
Answer:
A plane which has no shear pressure is known as precept aircraft the corresponding stress is called principle strain.
Question: 29. Write The Bending Equation?
Answer:
The bending second equation is, M/I = f/y= E/R,
Where,
M – Bending second (M is in N-mm)
I – Moment of inertia about centroidal axis (I is in mm?)
f – Bending Stress (f is in N/mm²)
y – Distance from neutral axis (y is in mm)
E – Young’s modulus (E is in N/mm²)
R – Radius of curvature (R is in mm)
Engineering Drawing Interview Questions
Question: 30. Write The Torsion Equation?
Answer:
The torsional equation is, T/J = q/r = G?/L
Where,
T – Torsional second (T is in N-mm)
J – Polar second of inertia (J is in mm?)
q – Shear stress in the element (q is in N/mm²)
r – Distance of detail from centre of shaft (r is in mm)
G- Modulus of Rigidity (G is in N/mm²)
? – Angle of twist (? is in radians)
L – Length of the shaft (L is in mm)
Question: 31. What Are The Common Profiles Used For Splines In Machine Elements?
Answer:
The profiles used for splines in gadget factors are instantly sided splines, triangular splines and in volute splines.
Question: 32. What Type Of Threads Are Used For Pressure Tight Joints And For Power Transmission?
Answer:
Pipe threads are used for strain tight joints and rectangular threads for electricity transmission.
Ic Engine Interview Questions
Question: 33. How Computer Helps In Designing?
Answer:
Computer is capable of shop lot of information and equal can be retrieved fast.
It plays calculations very fast. The design may be visualized on screen and any changes made and its effects certainly seen. Thus gold standard designs can be performed tons faster and these are very well examined from all angles.
3-d Animation Interview Questions
Question: 34. Can You Tell Something About Hazop Study?
Answer:
In Hazop (Hazards and operatibility) have a look at each and every manageable procedure deviation from normal operating circumstance of a device having same design goal, is thoroughly analysed for reasons and result and required motion plan to mitigate threat/operability problems are counseled on the basis of available protective machine.
Question: 35. Why Slenderness Ratio Is Considered In Design Of Members?
Answer:
When duration of the member is extended, the member may fail due to buckling even though the member is symmetrical in all respects and the burden is concentric.
Question: 36. What Do You Mean By Allowance In Limits And Fits?
Answer:
Allowance in limits and suits refers to most clearance between shaft and hollow.
Solid Works Interview Questions
Question: 37. A Wire Rope Is Designated As 6 X 19 Standard Hoisting. What Do The Numbers 6 X 19 Represent?
Answer:
Number of strands x quantity of wires in each strand.
Question: 38. Why A Sleeve Is Fitted On A Ball Bearing?
Answer:
To save you relative axial motion among the shaft and the bearing.
Question: 39. What Is The Constant Factor In Case Of R-10 Series Of Preferred Numbers?
Answer:
1.25
Question: forty. On What Basis A Transmission Shaft Subjected To Bending Loads Must Be Designed?
Answer:
Maximum shear strain theory.
Thermodynamics Interview Questions
Question: 41. In Designing A Clutch Plate, What Assumption Is Made?
Answer:
Uniform put on condition is assumed because it results in safer layout.
Question: forty two. The Critical Speed Of Rotating Shaft Depends Upon What?
Answer:
Mass and stiffness.
Machine mastering Interview Questions
Question: 43. What Is The Empirical Formula Used To Give The Number Of Bolts In Flange Coupling?
Answer:
n = 0.2nd + three
Question: 44. How The Size Of The Gearis Usually Specified?
Answer:
By pitch circle diameter.
Question: 45. While Taking A Turn, What Action Differential Makes?
Answer:
An increase inside the pace of the outer wheel.
Question: 46. Rankine’s And Guest’s Theory Of Failure Are Applicable For What Materials?
Answer:
Rankine’s theory of failure is applicable for brittle substances. Guest’s concept of failure is applicable for ductile materials.
Question: 47. What Is The Main Purpose Of A Gear Box In A Vehicle?
Answer:
To range the torque at the road automobiles.
Question: 48. What Is Endurance Limit?
Answer:
Endurance restriction or fatigue restrict is the maximum stress that a member can with stand for an countless range of load applications without failure whilst subjected to absolutely reversed loading.
Question: forty nine. For Tight Leakage Joints, Which Type Of Thread Is Best Suited?
Answer:
NPT( National Pipe Threads)
Question: 50. A Bench Vice Has Which Type Of Thread?
Answer:
ACME