High carbon steel tools are used for turning at............
A higher cutting speed than HSS B lower cutting speed than HSS
C same cutting speed as HSS D same cutting speed as carbide tipped tool
Carbon percentage in a HSS tool is
A 0.-2to0.3% B 0.6 to 0.75% C 0.75 to 1.0% D 1 to 2 %
The most commonly used proportions of the alloying elements in HSS are............
A 18% tungsten 4% chromium 1% vanadium
B 18% chromium 4% cobalt 1 % tungsten
C 18% cobalt 4% tungsten 1 % chromium
D 18% vanadium 4% carbon 1 % cobalt
Easiness in machining with regard to tool life, surface finish and power consumption is called.............
A machinability B hardenability C rate of metal removal D surface finish rating
The working principle of the dial test indicator is............
A the linear motion is converted into reciprocating motion using slotted link
B the linear motion is converted into rotary motion using rack and pinion
C magnifications of small variation using lenses
D magnifications by electronic means
Chip breaker in a tool is given to.................
A break the chips into small pieces B have continuous chip
C have curled chip D have straight chip
Other name for ball turning is.............
A form turning B convex turning C spherical turning D profile turning
A jig is a special device which..........
A holds the job B locates the cutting tool C guides the tool
D holds supports, locates job and guides the tool
The type of jig in which base plate is not available is................
A plate jig B box jig C post jig D latch jig
Sine bar is made of..........
A high carbon steel B high speed steel C nickel steel D stabilized chromium steel
The length of sine bar is the distance between..............
A one end to another end of the sine bar B diagonal cross length of the sine bar
C centre to centre between the rollers D outside to outside between the rollers
The purpose of the holes provided on the sides of the sine bar is for.........
A easy handling
B supporting the slip gauge
C using as a reference while setting
D to reduce the weight as well as to clamp the work piece
Calculate the rpm, when cutting speed is 120m/min and the diameter of work is 80mm.
A 402 B 442 C 482 D 502
Determine the machining time where / = 350, n = 637, s = 0.05 mm and cs= 130 m/min.
A 8.78 min B 10.98 min C 12.98 min D 14.98 min
Which one of the following grade of slip gauge is recommended for workshop use?
A 00 B 0 C i D ii
Negative rake angle is used for.
A finishing cut B light depth of cut C medium depth of cut D heavy depth of cut
Standard wheel marking is given below. A 60 J8 V, where the letter, where V represent.............
A abrasive B grain C grit D bond
Aluminium oxide grinding wheels are used to grind material of...........
A low tensile strength B medium tensile strength
C high tensile strength D carbide tipped tool
The minimum dimension that can be measured in inside micrometer is......
A 13.00 mm B 20.00 mm C 25.00 mm D 38.00 mm
The least count of the inside micrometer is.........
A 0.001 mm B 0.01 mm C 0.10 mm D 1.00 mm
A lubricant is used with the objective of..............
A increasing fractional heat
B increasing resistance
C decreasing fractional resistance
D providing direct contact
A lubricant can posses high...................
A volatility B acidity C oiiiness D rusting agent
A good lubricant should have.............
A low viscosity - index B high viscosity - index
C low fire point D high volatility
Most important property of lubricating is..........
A its fire point B cloud point C oiliness D viscosity index
A fixed steady rest is used to support........
A the tool rigidly to avoid chatter during operation
B long shafts that are being threaded for their full length
C support work pieces during facing large diameter work pieces with short length
D support long work pieces held in chuck, to perform operation at the overhanging end
To fix an irregular shaped work piece on a lathe, which one of the following accessories is used?
A 3 jaw chuck B Driving plate C Face plate D Catch plate
The function of a travelling steady is to..........
A prevent bending of long shafts due to cutting force
B avoid load on the lathe centres while turning long job
C reduce the load on the cutting tool while turning
D ensure to turn at higher cutting speed than recommender
Which one of the following statement refers to the tool line?
A Time between starting and finishing job
B Total time for turning work including regrinding of tool
C Time between two successive regrinds
D Time between starting of metal cutting and tool wear cut
To cut two start thread, a 24 teeth driver gear is fixed at stud as driver gear. After completion of first start and before starting of second start, the driver gear must be turned to........
A 24 teeth B 18 teeth C 12 teeth D 6 teeth
The distance through which a screw thread advances axially in one turns is called........
A pitch of thread B lead of thread C depth of thread D diameter of thread
The diameter of the external screw thread is checked by............
A screw pitch gauge B thread ring gauge C screw thread micrometer D vernier caliper
The pitch of 3 start thread is the lead divided by...........
A 1 B 2 C 3 D 4
Tool maker's buttons are made of.
A plastic B cast iron C hardened steel D bronze
Tool maker's buttons are used to...........
A adjust the slackness in the guide ways of cross slide
B alter the tool height
C align the work for boring to a given datum
D alter align between centres
A screw thread is formed on a cylindrical
surface by cutting.........
A helical grooves B V - grooves C square grooves D half round grooves
The setting of lathe tool which respect to the work axis effects the value of.........
A rake angle and clearance angle B rake angle and cutting angle
C cutting angle and clearance angle D cutting angle and side rake angle
The width of the tool used to cut 10 mm pitch square thread is.........
A 10 mm B 7.5 mm C 5 mm D 2.5 mm
The tip of a cemented carbide tool is joined on the shank by...............
A welding B brazing C soldering D clamping with screw
By which one of the following, a rnulti - start, thread is cut on a lathe?
A Chaser B Single - point tool C Die head D Split die
Which one of the following screw threads forms has an included angle of 29° between the flank of thread?
A B.A thread B Acme thread C Butters thread D Knuckle thread
The special gear of 127 teeth or 63 teeth may be used to cut metric threads in a lathe having British lead screw is..........
A idle gear B change gear C translating gear D compound gear
The major diameter of a square thread is 40 mm pitch is 5 mm. What is the minor diameter?
A 30 mm B 32 mm C 35 mm D 36 mm