Mechanical Questions | Mechanical Engineering Interviews

1. Draft on pattern means

b) Allowance for machining

c) Locating pad

d) Compensate for stripping

e) Compensation for shrinkage




Ans.: d) Compensate for stripping




2. Slag inclusion in the casting is a

a) Surface defects

b) Internal defect

c) Crack

d) Notch




Ans.: a) Surface defects



3. Fettling is an operation performed

a) Before casting

b) After casting

c) During casting

d) After heat treatment




Ans.: b) After casting



4. Sprue in casting refers to

a) Gate

b) Runner

c) Riser

d) Vertical passage




Ans.: d) Vertical passage



5. Severe quenching can cause

a) Blow holes

b) Warping

c) Inclusions

d) Non of them


Ans.: b) Warping



6. Casting defects caused by the molten metal is

a) Blow holes

b) Swell

c) Scab

d) All of the above


Ans.: d) All of the above



7. Forming operation which does not involve rotation of work piece is

a) Spinning

b) Thread rolling

c) Ring rolling

d) Upsetting


Ans.: d) Upsetting



8. In hot working process

a) Poor surface finish is produced

b) Scale formed

c) Close tolerance is difficult to maintain

d) All of the above


Ans.: d) All of the above



9. Swaging is an operation of

a) Extrusion

b) Forging

c) Casting

d) Rolling



Ans.: b) Forging



10. Age hardening is related with

a) Stainless steel

b) Duralumin

c) Gun metal

d) Cast iron


Ans.: b) Duralumin



11. Foundry crucible is made of

a) Stainless steel

b) Mild steel

c) Lead

d) Graphite


Ans.: d) Graphite


12. A 1000 tonne press implies that

a) The weight of press is 1000 tonne

b) The press can handle works weighing up to 1000 tonne

c) It can exert pressure up to 1000 tonne

d) Its turn over in a day is 1000 tonne


Ans.: c) It can exert pressure up to 1000 tonne



13. The transistor is made of

a) Silver

b) Germanium

c) Copper

d) Cast iron


Ans.: b) Germanium



14. Pre heating is essential in welding of

a) High speed steel

b) German steel

c) Stainless steel

d) Cast iron


Ans.: a) High speed steel



15. Spring back phenomenon occurs in

a) Forging

b) Hot penning

c) Spinning

d) Bending


Ans.: d) Bending



16. Wire is made by

a) Drawing

b) Forging

c) Rolling

d) Casting


Ans.: a) Drawing



17. Greater forging capacity is achieved with

a) Mechanical press

b) Power hammer

c) Hydraulic press

d) Non of them


Ans.: c) Hydraulic press



18. Turbine rotor is made by

a) Rolling

b) Sand casting

c) Forging

d) Extrusion


Ans.: b) Sand casting



19. Which of the following welding process uses consumable electrodes

a) TIG

b) MIG

c) Thermit

d) Laser


Ans.: b) MIG



20. The phenomenon of weld decay occurs in

a) Cast iron

b) Brass

c) Bronze

d) Stainless steel


Ans.: d) Stainless steel



21. The crystal structure of alpha iron

a) BCC

b) FCC

c) HCP

d) Cubic


Ans.: a) BCC



22. The hardest known material is

a) Ceramic

b) High speed steel

c) Cemented carbide

d) Diamond


Ans.: d) Diamond



23. Which of the following is the most ductile material

a) Lead

b) Copper

c) Mild steel

d) Vanadium


Ans.: a) Lead



24. Brinell hardness tester uses a hardened steel ball of size

a) 1 mm

b) 5 mm

c) 10 mm

d) 15 mm


Ans.: c) 10 mm



25. Trimming process is associated with

a) Polishing of metals

b) Machining

c) Electroplating

d) Forging


Ans.: d) Forging