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4

The acetylene cylinder is usually painted with

A. Black colour

B. White colour

C. Maroon colour

D. Yellow colour

Correct Answer :

C. Maroon colour


Related Questions

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The cutting edge of a chisel should be

A. Hardened

B. Tempered

C. Hardened and tempered

D. Case hardened

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Extrusion

A. Is extensively used for making bolts and nuts

B. Is used for reducing the diameter of round bars and tubes by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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4

The binder commonly used in making oil sand, is

A. Clay type binder

B. Organic type binder

C. Inorganic type binder

D. Any one of these

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4

According to Indian standard specifications, 100 H6/g 5 means that.

A. Basic size is 100 mm

B. Actual size is 100 mm

C. Difference between the actual size and basic size is 100 mm

D. None of the above

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4

Spot welding is used for welding

A. Lap joints in plates having 0.025 mm to 1.25 mm thickness

B. Lap joints in plates having thickness above 3 mm

C. Butt joints in plates having 0.025 mm to 1.25 mm thickness

D. Butt joints in plates having thickness above 3 mm

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4

In a cold chamber die casting machine

A. Melting pot is separate from the machine

B. Melting pot is an integral part of the machine

C. Melting pot may have any location

D. Low temperature and pressure is used

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4

The surface to be left unmachined is marked on the pattern by

A. Red colour

B. Yellow colour

C. Black colour

D. Blue colour

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4

The increase in hardness due to cold working, is called

A. Age hardening

B. Work hardening

C. Induction hardening

D. Flame hardening

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4

In a compound die

A. Only one operation is performed at each stroke of the ram

B. Two or more operations are performed simultaneously at the single stroke of the ram

C. Two or more cutting operations are performed at one station of the press in every stroke of the ram

D. Both cutting and non-cutting operations are performed at one station of the press in every stroke of the ram

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4

Rotary swaging

A. Is extensively used for making bolts and rivets

B. Is used for reducing the diameters of round bars and a tube by rotating dies which open and close rapidly on the work

C. Is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface

D. Consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part

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4

The operation of cutting a sheet of metal in a straight line along the length, is known as

A. Plunging

B. Notching

C. Slitting

D. Forming

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4

In backhand welding, the angle between the welding rod and the work is ________ as compared to forehand welding.

A. Same

B. Less

C. More

D. None of these

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4

If an aluminium pattern made from a wooden master pattern is to be used for grey iron castings, then the shrinkage allowance allowed on the wooden pattern should be

A. 10 mm/m

B. 16 mm/m

C. 20 mm/m

D. 26 mm/m

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The metal is subjected to mechanical working for

A. Refining grain size

B. Reducing original block into desired shape

C. Controlling the direction of flow lines

D. All of these

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The welding set up is said to have straight polarity, when

A. Work is connected to the positive terminal and the electrode holder to the negative terminal

B. Work is connected to the negative terminal and the electrode holder to the positive terminal

C. Work is connected to the positive terminal and the electrode holder is earthed

D. Work is connected to the negative terminal and the electrode holder is earthed

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In shielded arc welding

A. Large electrode is used

B. Welding rod coated with slag is used

C. Welding rod coated with fluxing material is used

D. None of the above

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4

In forehand welding, the angle between the welding rod and the work is kept as

A. 30°-40°

B. 40°-50°

C. 50°-60°

D. 60°-70°

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4

When a hole or cavity to be cored is not in line with the parting surface, then a ________ is used.

A. Horizontal core

B. Vertical core

C. Drop core

D. Balanced core

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4

In order to cut mild steel, the cutting angle of chisel should be

A. 30°

B. 45°

C. 50°

D. 60°

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During hot working of metals

A. Poor surface finish is produced

B. Scale is formed on the metal surface

C. Close tolerances cannot be maintained

D. All of these

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4

The blank diameter used in thread rolling will be

A. Equal to minor diameter of the thread

B. Equal to pitch diameter of the thread

C. A little larger than the minor diameter of the thread

D. A little larger than the pitch diameter of the thread

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4

A rip saw

A. Is a two man saw

B. Is used for cutting along the grains of wood

C. Has a narrow blade with two wooden handles

D. All of the above

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4

In a cold chamber die casting machine, only nonferrous alloys with _________ are casted.

A. Low melting temperature

B. High melting temperature

C. Both (A) and (B)

D. None of these

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4

When a pattern is made in three parts, the top part, is known as a

A. Drag

B. Cheek

C. Cope

D. None of these

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4

Thermit, used in Thermit welding, is a mixture of

A. Charcoal and iron oxide

B. Charcoal and aluminium

C. Iron oxide and aluminium

D. Charcoal, iron oxide and aluminium

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4

Notching is the operation of

A. Cutting a sheet of metal in a straight line along the length

B. Removal of metal to the desired shape from the edge of a plate

C. Cutting a sheet of metal through part of its length and then bending the cut portion

D. Bending a sheet of metal along a curved axis

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4

The teeth of hacksaw blade are bent

A. Towards right

B. Towards left

C. Alternately towards right and left and every third or fourth left straight

D. May be bent in any direction

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4

In sheet metal work, he cutting force on the tool can be reduced by

A. Grinding the cutting edges sharp

B. Increasing the hardness of tool

C. Providing shear on tool

D. Increasing the hardness of die

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4

The type of file used for a wood work is

A. Single cut file

B. Double cut file

C. Rasp cut file

D. Any one of these

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4

In submerged arc welding, an arc is produced between a

A. Carbon electrode and the work

B. Metal electrode and the work

C. Bare metal electrode and the work

D. Two tungsten electrodes and the work