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4

In a drilling process, the metal is removed by both shearing & extrusion. General purpose drills are made of

A. Stainless steel

B. Mild steel

C. High speed steel

D. High carbon steel

Correct Answer :

C. High speed steel


Related Questions

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4

A common disinfectant used in village wells for disinfection of water is

A. Free chlorine

B. Bromine

C. Iodine

D. Potassium permanganate

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4

A gas which is collected over water becomes moistened due to water vapor, exerts its own partial pressure at the gas temperature, which is termed as its

A. Aqueous tension

B. Saturated humidity

C. Vapor pressure

D. Absolute humidity

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4

__________ is not used as a material of construction in thermocouples.

A. Alumel

B. Rhodium

C. Constantan

D. Duralumin

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4

Large scale fire on fuel gas line is normally extinguished by

A. Water

B. Steam

C. Foam

D. Nitrogen

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4

The most abundant metal present in the earth's crust is;

A. Iron

B. Copper

C. Titanium

D. Aluminium

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4

Gas turbine normally employs a constant __________ cycle.

A. Pressure

B. Temperature

C. Volume

D. None of these

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4

For a first order chemical reaction, the concentration of the reactant decreases __________ with time.

A. Linearly

B. Exponentially

C. Logarithmically

D. Inversely

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4

Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of __________ gms of zinc per of steel strip.

A. 5-10

B. 1000-1500

C. 120-500

D. 1500-3000

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4

CANDU type nuclear reactor using natural uranium as fuel is the extensively used nuclear reactor because of the fact that the

A. Specific fuel consumption is very low due to the use of heavy water

B. Fuel cost is much lower than that used in pressurised water or boiling water reactor

C. Heavy water is used both as coolant as well as moderator

D. Both 'b' & 'c'

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4

The units of the rate constant for a second order reaction are

A.

B.

C.

D.

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Coating provided on the electrodes used in the arc welding is not expected to

A. Add alloying elements

B. Prevent electrode from contamination

C. Stabilise the arc

D. Provide protective atmosphere to weld

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4

Pick out the wrong statement about coating/electroplating of metals.

A. Phosphate coating is used as an excellent base for paints & enamels

B. Phosphate coating is less corrosion resistant than chromate coating

C. The base metal to be electroplated is normally made the cathode of the electrolytic cell and coating metal is made the anode

D. Calorising is the process of coating steel with chromium

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4

Which of the following does not discharge the dust collected as a dry solid?

A. Electrostatic precipitator

B. Wet scrubber

C. Bag filter

D. Gravity settling chamber

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4

Cassiterite is an ore of

A. Tin

B. Lead

C. Molybdenum

D. Chromium

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4

Pick out the wrong statement.

A. Complete unity of command exists in a line organisation

B. Line organisation is net suitable for expansion and growth of an industry

C. In line and staff organisation, line executes and staff directs

D. None of these

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4

The ratio of thermal & electrical conductivity is same for all the metals at the same temperature; and at around room temperature, this ratio is proportional to(where, T = absolute temperature, °K)

A. T

B. 1/T

C. T2

D. 1/T2

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4

Other parameters remaining same, the recrystallisation temperature of an alloy is lowered, when

A. Strain rate is increased

B. Grain size is increased

C. Prior cold deformation is increased

D. Not affected by any of the above parameters

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4

Which of the following is a boiler accessory
i.e., not a boiler mounting?

A. Blow off cock

B. Feed check valve

C. Feed water pump

D. Stop valve

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4

A material being tested for endurance strength is subjected to the __________ load.

A. Impact

B. Completely reversed

C. Dynamic

D. Static & dynamic

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4

Brazing is the joining of metals

A. Without melting the base metal

B. With a non-ferrous filler

C. Both (A) & (B)

D. Neither (A) nor (B)

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4

The lightest non-inflammable gas is

A. H2

B. He

C. Ar

D. O2

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4

The concentration of (H+) ions is 4 x 10-5 in a solution. Then pH of the solution will be (Given log 4 = 0.6)

A. 4.4

B. 5.6

C. 8.4

D. 2.4

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4

__________ test determines the yield strength, Young's modulus of elasticity, percentage reduction in area & percentage elongation of a material.

A. Tensile

B. Fatigue

C. Impact

D. None of these

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4

Most of the phosphorous present in the blast furnace burden enters into

A. Hot metal

B. Flue gases

C. Slag

D. Refractory lining

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4

Which of the following is a commonly used manometric liquid for low pressure range?

A. Ethyl alcohol

B. Carbon tetrachloride

C. Glycerol

D. Ethylene glycol

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4

According to thermodynamic Fahrenheit scale, the fundamental interval between ice point to steam point is

A. 180°

B. 212°

C. 32°

D. 273°

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4

Wavelength of radiation emitted by a body depends on the __________ of its surface.

A. Temperature

B. Area

C. Nature

D. All 'a', 'b' & 'c'

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4

__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.

A. Mach

B. Reynolds

C. Froude

D. Weber

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4

A jig is used while __________ a hole.

A. Boring

B. Counter boring

C. Drilling

D. Enlarging

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4

The trace metal present in insulin is

A. Cu

B. Zn

C. Fe

D. Ni