Production Engineering

Q1: In up milling, the thickness of chip is

A minimum at the beginning of the cut and maximum at the end of the cut

B maximum at the beginning of the cut and minimum at the end of the cut

C uniform throughout the cut

D none of these

Q2: The velocity of tool relative to the workpiece is known as cutting velocity.

A True

B False

Q3: Internal gears can be made by

A hobbing

B shaping with pinion cutter

C shaping with rack cutter

D milling

Q4: The machining of titanium is difficult due to

A high thermal conductivity of titanium

B chemical reaction between tool and work

C low tool-chip contact area

D none of these

Q5: In hot machining, tool is made of

A tungsten carbide

B brass or copper

C diamond

D stainless steel

Q6: When the cutting edge of the tool is dull, then during machining

A continuous chips are formed

B discontinuous chips are formed

C continuous chips with built-up edge are formed

D no chips are formed

Q7: A drill considered as a cutting tool having zero rake, is known as a

A flat drill

B straight fluted drill

C parallel shank twist drill

D tapered shank twist drill

Q8: A single point thread cutting tool should ideally have

A zero rake angle

B positive rake angle

C negative rake angle

D point angle

Q9: The lead screw of a lathe has __________ threads.

A single start

B double start

C multi-start

D any one of these

Q10: The tool made of cemented carbide wear out faster at

A slow speeds

B medium speeds

C fast speeds

D very fast speeds

Q11: Twist drills are made of

A high speed steel

B carbon steel

C stainless steel

D either (a) or (b)

Q12: A fixture is defined as a device which

A holds and locates a workpiece and guides and controls one or more cutting tools

B holds and locates a workpiece during an inspection or for a manufacturing operation

C is used to check the accuracy of workpiece

D all of the above

Q13: Side rake angle of a single point cutting tool is the angle

A by which the face of the tool is inclined towards back

B by which the face of the tool is inclined sideways

C between the surface of the flank immediately below the point and a plane at right angles to the centre line of the point of the tool

D between the surface of the flank immediately below the point and a line drawn from the point perpendicular to the base

Q14: Lapping is an operation of

A making a cone-shaped enlargement of the end of a hole

B smoothing and squaring the surface around a hole

C sizing and finishing a small diameter hole

D producing a hole by removing metal along the circumference of a hollow cutting tool

Q15: Gear lapping is an operation

A after heat treatment

B prior to heat treatment

C for gear reconditioning

D none of these

Q16: The work or surface speed for cylindrical grinding varies from

A 5 to 10 m/min

B 10 to 20 m/min

C 20 to 30 m/min

D 40 to 60 m/min

Q17: Which of the following statement is incorrect with reference of lathe cutting tools?

A The flank of the tool is the surface or surfaces below and adjacent to the cutting edges

B The nose is the corner, arc or chamfer joining the side cutting and the end cutting edges

C The heel is that part of the tool which is shaped to produce the cutting edges and face

D The base is that surface of the shank which bears against the support and takes tangent pressure of the cut

Q18: If the helix angle of the drill is made __________ 30°, then the torque required to drive the drill at a given feed will be more.

A equal to

B less than

C more than

Q19: A fine grained grinding wheel is used to grind hard materials.

A Correct

B Incorrect

Q20: A twist drill is a

A side cutting tool

B front cutting tool

C end cutting tool

D none of these

Q21: Drilling is an example of

A orthogonal cutting

B oblique cutting

C simple cutting

D uniform cutting

Q22: A push broach as compared to pull broach

A has less number of teeth

B is short and stocky

C removes less material for each pass of the tool

D all of the above

Q23: The lip angle of a single point tool is usually

A 20° to 40°

B 40° to 60°

C 60° to 80°

D none of these

Q24: The different spindle speeds on a lathe form

A arithmetical progression

B geometrical progression

C harmonical progression

D any one of these

Q25: Cast iron during machining produces

A continuous chips

B discontinuous chips

C continuous chips with built-up-edge

D none of these

Q26: Crater wear occurs mainly on the

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

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

C cutting edge only

D front face only

Q27: In ultra-sonic machining, the metal is removed by

A using abrasive slurry between the tool and work

B direct contact of tool with the work

C maintaining an electrolyte between the work and tool in a very small gap between the two

D erosion caused by rapidly recurring spark discharges between the tool and work

Q28: The rake angle required to machine brass by high speed steel tool is


B 10°

C 20°

D -10°

Q29: Grinding wheels should be tested for balance

A only at the time of manufacture

B before starting the grinding operation

C at the end of grinding operation

D occasionally

Q30: The correct sequence of tool materials in increasing order of their ability to retain their hot hardness is

A carbide, ceramic, cermet, borazon

B ceramic, carbide, borazon, cermet

C cermet, carbide, ceramic, borazon

D borazon, ceramic, carbide, cermet

Q31: A fixture does not guide the tool.

A Correct

B Incorrect

Q32: A round nose tool may be fed eitner from left to right end or from right to left end of the lathe bed.

A Yes

B No

Q33: In oblique cutting system, the maximum chip thickness occurs at the middle.

A Correct

B Incorrect

Q34: In order to prevent tool from rubbing the work __________ on tools are provided.

A rake angles

B relief angles

Q35: Side rake angle on tools is provided to control chip flow.

A True

B False

Q36: The angle included between the two lips projected upon a plane parallel to the drill axis and paralled to the two cutting lips, is called helix angle.

A Correct

B Incorrect

Q37: The average cutting speed for turning brass with a high speed steel tool is

A 15 to 19 m/min

B 25 to 31 m/min

C 60 to 90 m/min

D 90 to 120 m/min

Q38: If the diameter of the hole is subject to considerable variation, then for locating in jigs and fixtures, the pressure type of locator used is

A conical locator

B cylindrical locator

C diamond pin locator

D vee locator

Q39: The maximum production of small and slender parts is done by

A watch maker's lathe

B sliding head stock automatic lathe

C multispindle automatic lathe

D capastan lathe

Q40: Segmental chips are formed during machining

A mild steel

B cast iron

C high speed steel

D high carbon steel

Q41: In the relation VTn = C, the value of n for carbide tools is

A 0.1 to 0.2

B 0.20 to 0.25

C 0.25 to 0.40

D 0.40 to 0.55

Q42: Which of the following statement is wrong about ultra-sonic machining?

A It is best suited for machining hard and brittle materials.

B It cuts materials at very slow speeds.

C It removes large amount of material.

D It produces good surface finish.

Q43: The method of grinding used to produce a straight or tapered surface on a workpiece, is

A internal cylindrical grinding

B form grinding

C external cylindrical grinding

D surface grinding

Q44: The cutting tool in a milling machine is mounted on

A spindle

B arbor

C column

D knee

Q45: Cemented carbide tool tips are produced by powder metallurgy.

A True

B False

Q46: In orthogonal cutting system, the maximum chip thickness occurs at the middle.

A Correct

B Incorrect

Q47: The silicon carbide abrasive is chiefly used for grinding

A cemented carbide

B ceramic

C cast iron

D all of these

Q48: The facing is an operation of

A bevelling the extreme end of a workpiece

B embossing a diamond shaped pattern on the surface of a workpiece

C reducing the diameter of a workpiece over a very narrow surface

D machining the ends of a workpiece to produce a flat surface square with the axis

Q49: Larger end cutting edge angle __________ tool life.

A increases

B decreases

C does not effect

Q50: A left hand tool on a lathe cuts most efficiently when it travels

A from left to right end of the lathe bed

B from right to left end of the lathe bed

C with the help of a compound slide

D across the bed

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