Explore topic-wise MCQs in Engineering.

To counteract the bad effects of strain hardening on a cold formed part, it must be

The dew point temperature lines on psychrometric charts are straight inclined sloping downwards to the right. When relative humidity of moist air is 100%, then

Galvanic corrosion can not be prevented by

Fire in fuel gas pipelines is extinguished most effectively by

Which of the following is the most suitable abrasive for grinding high tensile strength materials ?

Laser welding is widely employed in the __________ industries.

Dryness factor of steam is defined as the ratio of the mass of vapor in the mixture to the mass of the mixture. Dryness factor of steam is measured by a __________ calorimeter.

Which of the following is used to produce draught in the locomotive boilers ?

Temper brittleness of a material can be fairly detected by the __________ test.

When the wavelength of incident X-rays increases, the angle of diffraction

Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot

The most suitable material of construction for a sewer to carry sewage under high pressure is

Filler material used in welding should have __________ as compared to the parent metal to be welded.

Gantt charts are used for streamlining the

Which of the following does not come under the category of'primary nutrient' for plant growth?

Effectiveness of a fertiliser is independent of the

Though liquid ammonia itself is a fertiliser (with 82% nitrogen content) yet it is commonly not used as such in a tropical country like India, because it

A cylinderical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson's ratio of the rod is

The surface tension of a liquid, at critical temperature is

Large scale fire on fuel gas line is normally extinguished by

Brazing is the joining of metals

C/H ratio (by weight) of naphtha used in nitrogenous fertiliser making is about

Optimum reaction temperature in steam reforming of naphtha is __________ C.

Yield of elemental phosphorous from rock phosphate is about __________ percent.

Conversion achieved in HNO₃ synthesis with the use of platinum catalyst is about 95-97%. The rate of formation of nitrogen dioxide from the oxidation of nitric acid is favoured by

Liquid ammonia and 60% nitric acid reaction (which produces ammonium nitrate) is

Formation of ammonium carbamate by reaction of NH₃ with CO₂ is a/an __________ reaction.

A potassic fertiliser contains 50% K₂O. It could be

Which of the following is a natural inorganic fertiliser ?

Leaching of phosphate rock by strong __________ acid produces phosphoric acid.

A phosphatic fertiliser contains 16% P₂O₅. It could be

In natural gas, the C/H ratio (by weight) varies in the range of

Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber's process ?

Prilling of urea should be accomplished (in a sprayer) just above the melting point of urea with minimum of retention time, otherwise it will result in

Rock phosphate used for the production of phosphatic fertiliser is mined at

CaH₄(PO₄)₂ is the chemical formula of

Nitro-phosphate (manufactured at Trom-bay) is a __________ fertiliser.

Conversion of yellow phosphorus to red phosphorous is done in retorts at 250-450 C in the

__________ is not a fertiliser.

__________ is the undesirable by-product produced in the manufacture of urea.

Tempering of a material does not improve its

Fusion zone in the electric furnace used for reduction of phosphate rock to elemental phosphorous is maintained at __________ C.

High relative humidity decreases the evaporative process and as the temperature is increased, the relative humidity decreases. The comfort range for human body is the ambient temperature of 22 to 27 C with relative humidity ranging from __________ percent.

Which of the following performance characteristics of a S.I engine is not affected by the front end volatility of the petrol used ?

__________ glass is used in the mercury in glass thermometer meant for measuring a temperature of 500 C.

Half life of a radioactive isotope corresponds to the time required for half of the __________ to decay.

The product of a commercial direct reduction process is

In the diving apparatus, helium is used along with oxygen, because it is

Materials having resistivity ranging from 1 to 100 ohm. cm is termed as

Heat release during phase change is observed in case of a/an