What do you understand by sulphur print ?Mechanical engineering Interview Question an Answer for experienced/Engineering Interview Questions and Answers for Freshers & Experienced

What do you understand by sulphur print ?

Sulphides, when attached with dilute acid, evolve hydrogen sulphide gas which stains bromide paper and therefore can be
readily detected in ordinary steels and cast irons. While sulphur is not always as harmful as is sometimes supposed, a sulphur
print is a ready guide to the distribution of segregated impurities in general.

Posted Date:- 2022-06-25 12:22:07

Why gas turbine power plant needs efficient compressor ?

How the thickness of thermal boundary layer and thickness of hydrodynamic boundary layer related ?

Which furnace burns low-ash fusion coal and retains most of the coal ash in the slag?

Out of electric heater and heat pump, which is economical in operation ?

Why supercritical boilers use less amount of steel compared to non-supercritical boilers ?

Horse power of I.C. engines can be expressed as RAC rating, SAE rating, or DIN rating. To which countries these standards belong ?

How engine design needs to be changed to burn lean mixture ?

As compression ratio increases, thermal n increases. How is thermal n affected by weak and rich
mixture strength?

Why consumption of lubricating oil is more in two-stroke eycle petrol engine than four-stroke cycle
petrol engine ?

In some engines glycerine is used in place of water for eooling of engine. Why ?

Which impurities form hard scale and which impurities soft seale ?

What is caustic embrittlement ?

What is pitting ? How it is caused ?

What is the name given to portion of thermal energy to be necessarily rejected to environment ?

Why the work per kg of air flow in axial flow compressor is less compared to centrifugal compressor for same pressure ratio ?

Why the electric motor of a fan with backward curved blades is never got overloaded under any condition ?

What is the difference between stalling and surging in rotary compressions ?

Under what condition the work done in reciprocating compressor will be least ?

When maximum discharge is obtained in n0zzle ?

How much is the work done in isochoric process ?

What is the relationship between COP of heating and cooling ?

How much resistance is offered to heat flow by drop wise condensation ?

Why rate of condensation is higher on a polished surface compared to rusty surface ?

Enthalpy and entropy are functions of one single parameter. Which is that ?

What are two essential conditions of perfect gas ?

Why entropy change for a reversible adiabatic process is zero?

What is the difference between scavenging and supercharging ?

In which process fluid expands but does no work ?

Whether entropy is intensive property or extensive property ?

Out of constant pressure and constant volume lines on TS diagramn which line has higher slope ? And whether slope is constant or variable ?

Whether superheated steam can be treated like ideal gas ?

Which parameter remains constant in isochoric process ?

Define the terms free energy and free enthalpy. What is their significance and importance?

What do you understand by latent heat ? Give four examples of latent heats.

Explain the rule to find specific heat of aqueous solutions.

What is the difference between heat capacity and specific heat of a material ?

What is Bauschinger effect?

What are whiskers ?

What is temper embrittlement in alloy steels and what are its effects ?

In which process internal energy remnains constant ?

Name the strongest and weakest type of atomic bonds.

List two effects of manganese in plain carbon steels.

What is the name given to ratio of actual eycle efficiency and ideal cycle efficieney.

Which factors influence the type of fracture in failure of a material ?

What for zinc finds applications ?

What is the maximum use of magnesium ?

What for admiralty brass used ?

What is the effect of addition of zinc in copper? What is the use of 7o/30 brass ?

What is the different between brass and bronze ?

What do you understand by sulphur print ?

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