Home
Current Affairs January 2024

What is the correct answer?

4

Powder metallurgy technique is used in the production of __________ tools.

A. Tungsten carbide

B. High carbon steel

C. High speed steel

D. Drilling

Correct Answer :

A. Tungsten carbide


Related Questions

What is the correct answer?

4

The thermodynamic law, = constant, is not followed by the

A. Free expansion of an ideal gas

B. Adiabatic expansion of steam in turbine

C. Adiabatic compression of air

D. Ideal compression of air

What is the correct answer?

4

Which of the following are considered applications of ultrasonic testing?

A. Determination of elastic constant

B. Detection of defects in metal

C. Measurement of material thickness

D. None of the above

What is the correct answer?

4

The bank of tubes located at the back of the domestic refrigerators are the __________ tubes.

A. Refrigerant cooling

B. Evaporator

C. Condenser

D. Throttling

What is the correct answer?

4

The most suitable material for die casting is

A. Iron

B. Copper

C. Steel

D. Nickel

What is the correct answer?

4

Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of

A. 1 : 1

B. 1 : 2

C. 2 : 1

D. 1 : 4

What is the correct answer?

4

Yield strength of a material is determined by the __________ test.

A. Creep

B. Tension

C. Compression

D. Endurance

What is the correct answer?

4

Wrought iron does not have

A. Uniform strength in all directions

B. Ability to hold protective coating

C. High ductility & corrosion resistance

D. Easily weldable characteristics

What is the correct answer?

4

Photographic plates are coated with

A. Silver nitrate

B. Silver halide

C. Calcium silicate

D. Metallic silver

What is the correct answer?

4

__________ is not a heat treatment process.

A. Cyaniding

B. Parkerizing

C. Austempering

D. Martempering

What is the correct answer?

4

Minimum thermal efficiency of a steam boiler may be around __________ percent

A. 25

B. 45

C. 65

D. 20

What is the correct answer?

4

The refrigerant freon-12 is chemically

A. CCl2F2

B. CCl3F

C. CClF3

D. CCl4F

What is the correct answer?

4

Which of the following relationships is correct for relating the three elastic constants of an isotropic elastic material (where, E = Young's modulus, G = Modulus of rigidity or shear modulus v = Poisson's ratio)?

A. E = 2G (1 + v)

B. E = G (1 + v)

C. E = G (1 + v)/2

D. E = 2G (1 + 2v)

What is the correct answer?

4

Thermal efficiency of an internal combustion engine is around __________ percent.

A. 8

B. 35

C. 65

D. 80

What is the correct answer?

4

__________ flux is used for the extraction of metal from its self fluxing ores.

A. No

B. Acid

C. Basic

D. Neutral

What is the correct answer?

4

Which of the following materials has the poorest electrical conductivity?

A. Carbon

B. Aluminium

C. Silver

D. Stainless steel

What is the correct answer?

4

A dummy activity is used in PERT network to describe the

A. Precedence relationship

B. Resource idleness

C. Resource restriction

D. Necessary time delay

What is the correct answer?

4

Carbon is present in the form of __________ in grey cast iron.

A. Spheroids

B. Nodular aggregates of graphite

C. Flakes

D. Cementite

What is the correct answer?

4

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

A. Free chlorine

B. Bromine

C. Iodine

D. Potassium permanganate

What is the correct answer?

4

As per international norms, the maximum permissible value of noise level in the industrial environment is __________ decibels as measured at a distance of 1.5 metres from the source of noise.

A. 110

B. 85

C. 60

D. 45

What is the correct answer?

4

The value of for air & most common gases can be safely assumed to be

A. 0.8

B. 1

C. 1.4

D. 1.8

What is the correct answer?

4

Surface tension of a liquid

A. Is due to intermolecular forces of cohesion

B. Decreases with rise in temperature

C. Is responsible for the spherical shape of an isolated liquid drop

D. All (A), (B) & (C)

What is the correct answer?

4

A high pressure boiler generates steam at a pressure greater than __________ kg/cm2.

A. 10

B. 30

C. 50

D. 80

What is the correct answer?

4

Probability of cavitation occuring becomes very high, when the local __________ resulting in water bubbles formation, which on rupture cause cavitation

A. Pressure falls below the vapour pressure

B. Pressure becomes very high

C. Temperature becomes low

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

What is the correct answer?

4

Co-efficient of performance of a Carnot cycle refrigerator operating between - 23°C and + 27°C is

A. 3

B. 5

C. 0.5

D. 1.5

What is the correct answer?

4

Current employed in resistance welding ranges from __________ kVA/.

A. 1.2 to 2.5

B. 4.5 to 6.2

C. 7.5 to 8.5

D. 10.5 to 15.5

What is the correct answer?

4

In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be

A. ΔQ = 0, ΔS=0

B. ΔQ = 0, ΔS = +ve

C. ΔQ = 0, ΔS = -ve

D. ΔQ = +ve, ΔS= +ve

What is the correct answer?

4

Liquor poisoning generally occurs due to the presence of __________ in it.

A. Ethyl alcohol

B. Impurities

C. Methyl alcohol

D. Carbonic acid

What is the correct answer?

4

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

A. Impact

B. Completely reversed

C. Dynamic

D. Static & dynamic

What is the correct answer?

4

Work hardenable alloy steel used to make the bucket wheel excavators, blades of bulldozers and other earth moving equipments contain iron, carbon and

A. Manganese

B. Silicon

C. Nickel

D. Chromium

What is the correct answer?

4

Larger length & diameter water pipes are made by

A. Electrical resistance welding

B. Die casting

C. Semi-centrifugal casting

D. Continuous casting