In this post we are going to discuss, top machine design interview questions asked by the interviewers.
- What is standardization?
- What is the preferred number?
- Define ergonomics
- What is creep?
- What is tolerance?
- What is fit?
- What are types are tolerance?
- What are unilateral and bilateral tolerances?
- What is a clearance fit? Give its examples.
- What is transition fit? Give its examples.
- What is an interference fit? Give its examples.
- What is the shaft basis system for giving tolerances?
- What is the hole basis system for giving tolerances?
- Give the steps involved in the design process.
- What are the advantages of the hole basis system over the shaft basis system?
- What is the fundamental deviation?
- What is selective assembly?
- Distinguish between interchangeable and selective assemblies.
- Explain the symbol for surface roughness.
- What is the factor of safety?
- Why it is necessary to use the factor of safety?
- What is stress concentration?
- What are the causes of stress concentration?
- What are the methods of reducing stress concentration?
- What is fatigue failure?
- What are the machine components that fail by fatigue?
- What is the endurance limit?
- What is fatigue life?
- What is notch sensitivity?
- What are the factors that affect the endurance limit of a machine part?
- What is a power screw?
- What are the applications of power screws?
- What is “overhauling” of the power screw? State condition for overhauling.
- What is the “self-locking” of a power screw? State condition for self-locking.
- State the applications where self-locking is essential.
- What is a stud?
- Why is hexagonal head preferred for cap screw instead of the square head?
- What is a bolt of uniform strength?
- What are the four basic elements of the weld symbol?
- Why are riveted joints replaced by welded joints?
- How is rivet specified?
- What is the common material for rivets?
- What is caulking? What is its objective?
- What is fullering? What is its objective?
- What is the function of the transmission shaft?
- What is a fillet? Why it is provided for the shaft?
- What are the types of stresses induced in shafts?
- Which theories of failure are applicable for shafts? why?
- Define equivalent torsional moment and equivalent bending moment.
- What do you understand by torsional rigidity?
- What do you understand by lateral rigidity?
- What is the permissible shear stress as per the ASME code?
- What are splines? Where do you use them?
- What is the difference between the coupling and clutch?
- What are the functions of spring?
- What is the spring index?
- What is the stiffness of spring?
- What is a surge in spring?
- Why belt drives are called flexible drives?
- State the law of belting.
- What is belt rating?
- What is creep in belts?
- What is the standard value of belt angle in a V-belt?
- How will you designate V-belt?
- What is the standard value of groove angle for V-pulley?
- What is polygonal action in roller chains? How will you reduce it?
- What are the types of failure in roller chains?
- What are the functions of bearings?
- What are the applications of sliding contact bearings?
- What are the applications of the rolling contact bearing?
- Why ball and roller bearings are called ‘antifriction’ bearings?
- Why taper roller bearings are used in pairs?
- Define static load carrying capacity of bearing.
- What is the L10 and L60 life of bearing?
- What are the objectives of lubrication?
- What is thick film lubrication?
- What is zero film bearing?
- What is hydrostatic and hydrodynamic lubrication?
- Why hydrodynamic bearings are called ‘self-acting’ bearings?
- Why hydrostatic bearings are called ‘externally pressurized’ bearings?
- Define Viscosity.
- State Newton’s law of viscosity.
- Why does viscosity decreases with an increase in temperature?
- What is the viscosity index?
- State desirable properties of good bearing material.
- What is SAE?
- What is the purpose of additive?
- In a gear speed reducer, why is the diameter of an output shaft is greater than that of the input shaft?
- What is herringbone gear?
- State important reasons for adopting involute curve for gear tooth profile.
- What is a full depth involute gear tooth system?
- What is pitting and scoring?
- What is a hunting tooth?
- Where do you use grease as gear lubrication?
- What is virtual or formative helical gear?
- What is crown gear?
- What is miter gear?
- State the material for the worm and worm wheel.
- Where do you use worm gear?
- Where do you use bevel gear?
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