Home
Current Affairs January 2024

What is the correct answer?

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

Correct Answer :

C. Feed water pump


Related Questions

What is the correct answer?

4

Oxyacetylene reducing flame is used while carrying out welding on

A. Alloy steel

B. Grey cast iron

C. Mild steel

D. High carbon steel

What is the correct answer?

4

__________ has the highest melting point out of the following.

A. Tungsten

B. Zirconium

C. Molybdenum

D. Tantalum

What is the correct answer?

4

Corrosion of metals cannot be prevented by its

A. Tempering

B. Chromising

C. Aluminising

D. Alloying

What is the correct answer?

4

Glycerine is used as a coolant in cooling of some engines instead of water, because

A. Its higher boiling point (290°C) increases its heat carrying capacity

B. Comparatively less weight of coolant is required

C. Smaller radiator can be used

D. All a, b & c

What is the correct answer?

4

The passage between the nozzle and the __________ is called 'sprue' in case of injection moulding.

A. Runner

B. Cylinder

C. Mold

D. None of these

What is the correct answer?

4

__________ is a special constituent of chlorophyll without which photosynthesis is not possible.

A. Calcium

B. Nitrogen

C. Phosphorous

D. Hydrogen

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

Fire in fuel gas pipelines is extinguished most effectively by

A. Spraying water

B. Blanketting the area with nitrogen atmosphere

C. Fire fighting foam

D. None of these

What is the correct answer?

4

Use of water as a manometric liquid suffers from the disadvantage of its

A. Low vapour pressure

B. Corrosive nature

C. High vapour pressure

D. High boiling point

What is the correct answer?

4

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

A. Hot metal

B. Flue gases

C. Slag

D. Refractory lining

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

High speed steel tools retain their hardness upto a temperature of __________ °C.

A. 500

B. 750

C. 900

D. 1100

What is the correct answer?

4

Which of the following terminology is used for the temperature at which new grains are formed in a metal?

A. Eutectic temperature

B. Lower critical temperature

C. Recrystallisation temperature

D. Upper critical temperature

What is the correct answer?

4

__________ test can be termed as the semidestructive test.

A. Impact

B. Torsion

C. Hardness

D. Charpy

What is the correct answer?

4

Which of the following is not categorised as the ore agglomeration process?

A. Nodulising

B. Pelletising

C. Balling

D. Briquetting

What is the correct answer?

4

Thermal equivalent of electrical power in practical calculation is __________ kcal/kWh.

A. 746

B. 3000

C. 1000

D. 550

What is the correct answer?

4

In case of compression of one kg of air, the work done will be the least, when the value of polytropic index 'n' is

A. 1

B. 1.4

C. 1.5

D. Y = Cp/Cv

What is the correct answer?

4

The burnout heat flux in the nucleate boiling regime is not a function of the

A. Liquid density

B. Vapour density

C. Temperature difference

D. Heat of evaporation

What is the correct answer?

4

The 'transition temperature' for ductile to brittle behaviour of steel increases with increase in the __________ content in steel.

A. Carbon

B. Manganese

C. Both 'a' nor 'b'

D. Neither 'a' nor 'b'

What is the correct answer?

4

In Imperial Smelting Process for extraction of zinc, zinc vapour thus produced is quenched in the external condenser by the use of the following:

A. Jet of water at high pressure

B. Blast of air

C. Mixture of water and air

D. Rain of molten lead

What is the correct answer?

4

The usual energy consumption in electric arc furnace steel making is __________ KWh/ton of steel.

A. 60 - 100

B. 400 - 700

C. 1200 -1500

D. 2000 - 2300

What is the correct answer?

4

Material of construction of foundry crucible is

A. Lead

B. Stainless steel

C. Graphite

D. Cast iron

What is the correct answer?

4

The leaching solvent used in Baeyer's process for the purification of bauxite is

A. Ammonium hydroxide

B. Sodium carbonate

C. Sodium hydroxide

D. Ammonium carbonate

What is the correct answer?

4

In connection with corrosion of metals, passivation is the process that

A. Intensifies deterioration

B. Changes the composition of the metal

C. Inhibits further deterioration

D. None of these

What is the correct answer?

4

Normalising of an object does not

A. Refine coarse grain structure obtained during hot working

B. Improve ductility

C. Improve yield strength

D. Improve mechanical properties

What is the correct answer?

4

Steel balls are manufactured by

A. Sintering

B. Casting

C. Cold heading

D. Spinning

What is the correct answer?

4

In condensers used in thermal power plants, steam is normally used in shell side and cooling water on the tube side, because of the reason that

A. Compared to the mass flow rate of cooling water, the rate of condensation of steam is invariably smaller

B. Maintaining vacuum on tube side is more difficult than that on the shell side

C. Water velocity can be increased conveniently to increase the overall heat transfer co-efficient because of its lower specific volume compared to steam

D. Condenser can act as a storage unit for condensed steam

What is the correct answer?

4

Corrosion rate cannot be lowered by reducing the __________ of the corroding medium.

A. Concentration

B. Velocity

C. Temperature

D. None of these

What is the correct answer?

4

Cascade control is

A. The continuous adjustment of the set point index of an automatic control loop by a primary (master) controller

B. Used when changes in process conditions cause serious upsets in the controlled variable

C. Useful to control flow from temperature

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

What is the correct answer?

4

The expected efficiency of a single riveted lap joint is of the order of 50%. If the thickness of the plate is increased four times, then the rivet diameter will have to be increased __________ times.

A. Two

B. Four

C. Six

D. Eight