Online Mechanical Engineering Test - Production Engineering Test

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Total number of questions: 20.
Time allotted: 30 minutes.
Each question carries 1 mark; there are no negative marks.
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Cast iron during machining produces

continuous chips

discontinuous chips

continuous chips with built-up-edge

none of these

[#]

Crater wear occurs mainly on the

nose part, front relief face and side relief face of the cutting tool

face of the cutting tool at a short distance from the cutting edge only

cutting edge only

front face only

[#]

The angle on which the strength of the tool depends is

rake angle

cutting angle

clearance angle

lip angle

[#]

When the backgear is engaged in a backgeared headstock, the spindle speed reduces considerably.

Agree

Disagree

[#]

Which of the following operations can be performed with milling cutters?

cutting key ways on shafts

cutting external screw threads

cutting teeth of spur gears

all of these

[#]

In oblique cutting system, the maximum chip thickness

occurs at the middle

may not occur at the middle

depends upon the material of the tool

depends upon the geometry of the tool

[#]

In a single point turning operation with a cemented carbide and steel combination having a Taylor exponent of 0.25, if the cutting speed is halved, then tool life will become

half

two times

eight times

sixteen times

[#]

The cutting speed of a drill depends upon the

material of drill

type of material to be drilled

quality of surface finish desired

all of these

[#]

A grinding wheel is said to be of __________ if it holds the abrasive grains more securely.

soft grade

medium grade

hard grade

[#]

10.

The operation of smoothing and squaring the surface around a hole is known as

counter-sinking

counter-boring

trepanning

spot facing

[#]

11.

Crater wear is mainly due to the phenomenon known as

adhesion of metals

oxidation of metals

diffusion of metals

all of these

[#]

12.

The width of cutting edge of a parting-off tool varies from

3 to 12 mm

5 to 20 mm

8 to 30 mm

15 to 40 mm

[#]

13.

The lip clearance angle should decrease towards the centre of the drill than at the circumference.

Yes

[#]

14.

In drilling brass, a drill with

zero helix angle is used

low helix angle is used

high helix angle is used

any helix angle can be used

[#]

15.

The abrasive recommended for grinding materials of low tensile strength is

silicon carbide

aluminium oxide

sand stone

diamond

[#]

16.

In ultra-sonic machining, tool is made of

tungsten carbide

brass or copper

diamond

stainless steel

[#]

17.

When the shear angle is large

path of shear is short and chip is thin

path of shear is large and chip is thick

path of shear is short and chip is thick

path of shear is large and chip is thin

[#]

18.

In a shaper

tool is stationary and work reciprocates

work is stationary and tool reciprocates

tool moves over stationary work

tool moves over reciprocating work

[#]

19.

Hard and tough materials like cast iron should be turned at

slow speed

high speed

any speed

certain specific speed

[#]

20.

The cutting speed for counter-boring should be __________ that of drilling operation.

equal to

less than

greater than

[#]

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Online Mechanical Engineering Test - Production Engineering Test

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