Mechanical Engineering Quiz # 40

Which of the following software enables to implement custom applications or modify the system for specialized needs?

Graphics software

Programming software

Operating software

Application softwar

On which of the following just in time manufacturing philosophy emphasizes?

Man power

Profit

Inventory

Manufacturing

Why designs are periodically modified?

To strive for zero-based rejection and waste

To make products easier and faster to manufacture

To improve product performance

All of the mentione

Why sustainable manufacturing is required?

Proper maintenance

Reuse

Conserving resources

All of the mentioned

Which of the following are the chemical properties of good product material?

Corrosion

Surface treatment

Oxidation

All of the mentione

Which of the following operation is used to make a ball bearing?

Upsetting

Press forging

Roll forging

Skew rolling

Which of the following software is used to control the computer’s work flow, organize its data and perform house keeping functions?

Graphics software

Programming software

Operating software

Application softwar

Which of the following are cleaning fluids?

Emulsions

Solvents

Alkaline solutions

All of the mentioned

Which of the following forging operation is Heading?

Embossing

Coining

Piercing

Upsettin

Which of the following casting technique has a greater impact in semiconductor industry?

Single crystal

Induction melting

Directional solidification

Conventional casting

In which of the following casting process the sand is mixed with a thermosetting resin to form a mould?

Shell moulding

Squeeze casting

Centrifugal casting

Die casting

Which of the following is used to form Complex shapes effectively?

Metal casting

Sand casting

Powder metallurgy

Turning

For manufacturing of a certain amount of hole, maximum hole size was found to be 50.14 mm and minimum hole size was found to be 49.98. What will be the Tolerance in mm?

0.14

0.15

0.16

0.17

In the manufacturing of hole and shaft, the maximum shaft diameter was 49.88 mm and the minimum hole diameter was found to be 49.94 mm. Which of the following is correct?

Interference fit

Transition fit

Clearance fit

None of the mentione

For helical gears, the angle between hob’s spindle axis and workpiece’s spindle axis must be _____ as the helix angle of the helical gear.

Decreased by the half amount

Increased by the half amount

Decreased by the same amount

Increased by the same amoun

What causes an un-proportionally thin and high tooth in the toe region, and a short and thick tooth at the heel?

Difference in feed rates

Difference in PCDs of the generating gears

Error in indexing while manufacturing

Difference in outer and inner circumference of the generating g

Which of the following is the most common material used to produce forming rolls?

Chrome steels

Oil hardened tool steels

Aluminium

Carbide

Which of the following is correct about ECG?

Burr-free sharpening of needles

Machining of soft metals like aluminium can be easily done

Lower MRRs when grinding hard, heat-sensitive materials

Difficult to machine materials with high hardness like tungsten carb

Which of the following manufacturing process is favourable for making tool for ECM?

Cold forging

Casting

Shaping

Laser cutting

According to which of the following Porous materials are classified?

Total area

Pore size

Manufacturing method

Difference between initial and final ma

Why do the pore characteristics of the resulting pSi structures depend upon the doping type? Choose the most correct option.

The pore formation mechanism relies on doping

Atomic size of doping atom affects the final structure

Processing time depends on the doping

The manufacturing process is selected on the basis of dop

Which of the following is the odd-one out?

Micro-grinding

Micro-turning

Micro-milling

Micro-EBM

Manufacturing of capillary electrophoresis chips has an application of which of the following process?

Electron beam machining

Abrasive jet machining

Chemical Milling

Ultrasonic machining

In composite or reverse laid ropes

Direction of twist of wires in strands is opposite to the direction of twist of strands

Direction of twist of wires and strands are same

Wires in two adjacent strands are twisted in opposite direction

Wires are not twisted

None of the above

Whether any core is required in wire ropes

Yes

No

Sometimes

Rarely

Very often

If shearing stress in nut is half the tensile stress in a bolt, then nut length should be equal to

Diameter of bolt

0.75 x diameter of bolt

1.25 x diameter of bolt

1.5 x diameter of bolt

0.5 x diameter of bolt.

Basic shaft is one

Whose upper deviation is zero

Whose lower deviation is zero

Whose lower as well as upper deviations are zero

Does not exist

None of the above

Basic hole is one

Whose upper deviation is zero

Whose lower deviation is zero

Whose lower as well as upper deviations are zero

Does not exist

None of the above

I.S. specifies following total number of grades of tolerances

18

16

20

22

14

For standard coarse threads of nut, the threads will be as strong in failure by shear as the bolt in tension, if the height of nut (h) is approximately

0.4 times

0.6 times

0.7 times

0.8 times

0.9 times the normal diameter of bolt