Home
Current Affairs January 2024

What is the correct answer?

4

The effect of friction on the flow of steam through a nozzle is to decrease the __________ of steam.

A. Wetness

B. Mass flow rate

C. Both 'a' & 'b'

D. Neither 'a' nor 'b'

Correct Answer :

C. Both 'a' & 'b'


Related Questions

What is the correct answer?

4

The main charge in blast furnace is usually

A. Iron ore & coke

B. Iron ore, coke & air

C. Limestone, coke & iron ore

D. Limestone, sand & iron ore

What is the correct answer?

4

Which of the following is not an explosive?

A. TNT

B. CMC

C. RDX

D. Lead azide

What is the correct answer?

4

The following thermocouple may be used for measuring temperature upto 1873°K.

A. Chromel-alumel

B. Copper-constantan

C. Platinum-platinum rhodium

D. Iron-constantan

What is the correct answer?

4

Force between the molecules of the same substance is called __________ force.

A. Adhesive

B. Cohesive

C. Molecular

D. Vander Walls

What is the correct answer?

4

Cold working of a material results in increase in hardness, which is termed as the __________ hardening.

A. Cold

B. Work

C. Age

D. Induction

What is the correct answer?

4

__________ pipe is the most suitable for carrying sanitary drainage.

A. Stainless steel

B. Reinforced cement concrete

C. Cast iron

D. Asbestos cement

What is the correct answer?

4

Which of the following fastening devices has its both ends threaded?

A. Bolt

B. Stud

C. Set screw

D. Split nut

What is the correct answer?

4

__________ of test specimens is not involved in any hardness testing method.

A. Fracture

B. Indentation

C. Wear

D. Scratch

What is the correct answer?

4

The property of material, by which a given amount of energy is absorbed by it without plastic deformation, is called the

A. Resilience

B. Toughness

C. Ductility

D. Impact strength

What is the correct answer?

4

Which of the following hardness tests does not measure the indentation hardness of metals and alloys?

A. Vickers hardness test

B. Shore scleroscope test

C. Brinell hardness test

D. Rockwell hardness test

What is the correct answer?

4

__________ of hard alloy and tool steel is done to make it easily machinable.

A. Case carburising

B. Tempering

C. Normalising

D. Annealing

What is the correct answer?

4

Air/fuel ratio by weight for combustion of methane with theoretical quantity of air will be about

A. 9 : 1

B. 17 : 1

C. 23 : 1

D. 29 : 1

What is the correct answer?

4

Austempering process results in the formation of __________ structure.

A. Martensitic

B. Bainitic

C. Carburised

D. Stressed

What is the correct answer?

4

Screws are specified by their __________ diameters.

A. Minor

B. Major

C. Pitch

D. None of these

What is the correct answer?

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

What is the correct answer?

4

Non-ferrous alloys used for making cutting tools need not have high

A. Abrasion resistance

B. Toughness

C. Red hardness

D. Cutting speed

What is the correct answer?

4

Friction factor for fluid flow in pipe does not depend upon the

A. Pipe length

B. Pipe roughness

C. Fluid density & viscosity

D. Mass flow rate of fluid

What is the correct answer?

4

Which of the following is an example of stress corrosion?

A. Season cracking of brass

B. Caustic embrittlement of steel

C. Both (A) & (B)

D. Neither (A) nor (B)

What is the correct answer?

4

Nusselt number is related to Grashoff number (Gr) in turbulent & laminar flow respectively, in respect of free convection over a vertical flat plate as

A. Gr0.25, Gr

B. Gr0.25, Gr0.33

C. Gr, Gr0.25

D. Gr0.33, Gr0.25

What is the correct answer?

4

Which of the following is not a characteristic observed in material failure by fatigue fracture?

A. Plastic deformation of material does not occur

B. Initiation of crack from below the surface does not occur

C. Initiation of crack occurs on the surface of the machine part

D. Presence of both rough & smooth zone with conchoidal markings in smooth zone of the surface

What is the correct answer?

4

Dry saturated steam can be converted into superheated steam by

A. Increasing its cross-sectional area of flow

B. Passing it through a pressure reducing valve

C. Forcing it downwards through a vertical tube

D. None of these

What is the correct answer?

4

Plastics as a material of construction suffer from the drawback of low

A. Machinability

B. Density

C. Strength

D. Plastic deformation

What is the correct answer?

4

Starting friction is low in case of the __________ lubrication.

A. Boundary

B. Hydrodynamic

C. Hydrostatic

D. Mixed/semi-fluid

What is the correct answer?

4

In chemical dehumidification process

A. Wet bulb temperature increases

B. Dry bulb temperature remains constant

C. Dew point temperature increases

D. Dry bulb temperature increases

What is the correct answer?

4

The type of pump used for lifting large quantity of sewage is a __________ pump.

A. Gear

B. Centrifugal

C. Reciprocating

D. Plunger

What is the correct answer?

4

A compact estimate about the amount of materials handling between various work stations is obtained from the

A. Gantt chart

B. Bin chart

C. String diagram

D. Travel chart

What is the correct answer?

4

Tumbling is the process of improving the __________ of the materials/parts.

A. Surface finish

B. Fatigue limit

C. Creep limit

D. Surface cleanliness

What is the correct answer?

4

Which of the following is not a ferromagnetic material?

A. Nickel

B. Cobalt

C. Aluminium

D. Iron

What is the correct answer?

4

For which pair of the fuel gases, calorific value (C.V.) of one fuel is almost double that of the other on volume basis (i.e., kcal/Nm3) while the C.V. is same on weight basis (i.e., kcal/kg)?

A. Propane and acetylene

B. Propane and LPG

C. Sewage gas and gobar gas

D. B.F gas and coke oven gas

What is the correct answer?

4

A particle is settling in a liquid under Stokesian conditions. The free falling velocity of the particle is proportional to

A. √(Particle diameter)

B. Particle diameter

C. (Particle diameter)2

D. (Particle diameter)3