Top 101 Interview Questions and Answers of Refrigeration and Air Conditioning  ( Mechanical Engineering ) Asked in Interviews and Exams for Freshers and Experienced 

The idea behind the post Top 101 Interview Questions and Answers of Refrigeration and Air Conditioning  ( Mechanical Engineering ) Asked in Interviews and Exams for Freshers and Experienced  is to give an idea of questions to viewers of this post.  Top 101 Interview Questions and Answers of Refrigeration and Air Conditioning  ( Mechanical Engineering ) Asked in Interviews and Exams for Freshers and Experienced   are beneficial for students as well as candidates appearing for interviews.

What is the function of refrigerant?

What is brine?

Application of air refrigeration system

Function of cooling ponds

Importance of wet bulb temperature

What is the chemical formula of R-744

What is the function of capillary tube

On what cycle the domestic refrigerator works

How much power an Electrolux refrigerator will consume

What do you mean by latent heat?

What are insulating materials?

What is the cooling effect of a 1.5 ton Air Conditioner?

Name any four pipe fittings in a condition plant

What is sensible heating process? Show it on psychometric hart

What is the function of refrigerant?

What is brine?

Applications of air refrigeration system?

Function of cooling ponds?

Importance of wet bulb temperature.

What is the chemical formula of R-744?

What is the function of capillary tube?

On what cycle the domestic refrigerator works?

How much power an Electrolux refrigerator will consume?

What do you mean by latent heat?

What are insulating materials?

What is the cooling effect of a1.5 ton air conditioner.

Name any four pipe fittings in air conditioning plant?

What is sensible heating process?

Show it on psychometric hart.

How milky white ice can be obtained?

Can the heat rejected in a refrigerating system more than the heat absorbed or not?

What are inorganic refrigerants?

Which fluid is used in Electrolux refrigerator?

Explain the working of bell coleman cycle.

What are the advantage f sola refrigeration system over vapors compression system?

Write note on evaporative condenser.

Write short note on thermo-electric refrigeration?

What is the difference between COP and efficiency ?

What is the effect of moisture in refrigeration system? How it is removed?

Make a layout of an ice plant.

How will you charge a hermetically sealed compressor with refrigerant?

Explain any two refrigerant controls.

Give the properties of ammonia.

Explain finned tubed evaporator.

Which process Gives minimum work requirement for compression and why?

Explain the application of air conditioning in printing ,food and textile industry.

What is the function of thermostat in refrigeration?

What processes are carried out in maintenance of window air conditioner?

What are the properties of an idea refrigerant?

Compare vapor absorption and vapor compression cycles?

Draw and explain the psychometric chart?

Give the calculations of all heat loads in air conditioning plants.

Define refrigeration effect.

Define C.O.P of a refrigeration system.

What is effect of super heating of vapor on C.O.P in vapors compression refrigerated system?

Define enthalpy.

What is use of accumulator in vapor compression refrigerated system?

State volumetric efficiency in vapor compression refrigerated system?

What are hydrocarbons?

Define refrigerant.

Give two advantages of solar refrigeration system over vapor compression system.

Name two types of rotary compressor.

Define cooling tower.

What is use of valve in refrigeration system?

Define saturated air.

What is dry bulb temperature?

What is comfort air conditioning?

Define metabolic rate for a human body.

What is use of comfort chart?

Give one disadvantage of central air conditioning.

What are the main applications of refrigeration & air conditioning?

What are the main advantages of air refrigeration system?

Explain thermo-electric refrigeration.

Write short note on dry compression.

Draw & explain pv diagram of simple vapor compression refrigeration cycle.

What are the effect of change in suction pressure on performance of vapor compression system?

Define primary & secondary refrigerants. Give there examples also.

What is R-134a. What are its main properties?

Write short note on reciprocating compressor.

Explain the working of shell & coil condenser.

What is spray pond. Explain it with diagram?

Name the different types of expansion valves. Explain any one of them.

What is importance of psychometric?

Write a short note on spilt type air conditioning.

What are the main functions of air conditioning?

Write short on wet compression.

What  do you mean by  Superheated compression.

Explain in detail the domestic Electrolux refrigeration system with diagram.

Explain in detail the working of low-side float valve & high-side float valve.

What are psychometric processes?

Explain Sensible cooling

Explain Cooling with adiabatic humidification.

Explain window type air conditioning system with  the help of neat sketch. Give its advantages.

What is a ton refrigeration

What is COP

What is accumulator

Why it is difficult for wet compression

Name the classification of refrigerants

What is the function of rectifier in vapor absorption system

Degree of saturation

Latent heat of fusion

What is dew point

What us chemical formula of R-22

What is entropy

What is the function of filter

What is heat sink

On what principle the desert air cooler work

What does the area under PV diagram represents

Which has more efficiency vapor compression or vapor absorption cycle and why

What do you mean by duct

What us specific volume

What is the effect of sub cooling on COP

What is reversed cannot cycle? Explain with PV diagram

Give the properties of ammonia refrigerant

Disadvantages of air refrigeration system over vapor compression cycle

Compare open and closed system of refrigeration

Write short note on screw compressor with diagram

Explain thermostatic switch

What is sling psychomotor

Differentiate between a refrigerator and a heat pump

Draw and explain the vapor compression cycle

Write short note on solar heat gain through outside walls and roofs

Explain flooded type evaporator

What us the role of NH3 in domestic Electrolux refrigerator

Write short note on flash chamber

Write  five factors in details which contribute to human comfort conditioning

Explain in details any 5 refrigeration method

Compare the merits and demerits if vapor compression and vapor absorption cycle

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How to Alter Table in Oracle Sql to Add Column and Modify Column

How to Alter Table in Oracle Sql to Add Column and Modify Column 

 How to alter a table in SQL

Alter Table Command

A table in SQL can be altered by using alter table command. By using  alter table command , we can add new columns to an existing table. We can also change specification of the existing columns of a table using Alter Table command.

Adding New Columns using Alter Table command.

To add new columns in an existing table, we can use add option.

The general syntax is given below:

Alter table tablename add( new column specification);

Suppose we want to add zipcode column in employee table.

SQL>Alter table employee add(zipcode number(10));

This will add a new column zipcode to employee table.

Modifying existing columns of a table

To modify specification of existing columns of a table ,we can use modify option with alter table command.

The general syntax for modifying existing columns is given below

Alter table tablename modify( column new_specification);

Suppose we wants to chamge filed width of ecode column from 4 to 6.

SQL>Alter Table employee modify( ecode char(6));

Note: Be careful while changing column specifications 

add column sql

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Top 101 Interview Questions and Answers of Fluid Mechanics  ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced

 The idea of this post Top 101 Interview Questions and Answers of Fluid Mechanics  ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced is to give an idea of questions to viewers of this post.  Top 101 Interview Questions and Answers of Fluid Mechanics  ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced are beneficial for students as well as candidates appearing for interviews.

Centre of pressure

Specific weight

Vacuum pressure

Mass density

Nape

Specific gravity

Hydraulic gradient line

Viscosity

Kinetic head.

Surface tension

Transition flow

Cohesion

Water hammer

Adhesion

Discharge

Open channel

Steady flow

Unit of discharge.

Derive newton's law of viscosity

Compare a notch with a weir.

State Bernoulli theorem.

Name various types of manometers.

Explain why pipes in parallels are used.

What is venturimeter.
Convert pressure of 30kn/m2 into height of mercury column.

Differentiate between steady and unsteady flow.

Differentiate between absolute pressure and gauge pressure.

What is bramah press? State the law it is based upon.

What is function of current meter.
Distinguish between laminar and turbulent flow.
Give range of Reynolds number for various flows.
What do you mean by mouth piece?
Define Real fluid
Define Hydro kinematics
Specific volume
Vapor pressure
Compressibility
Thrust
Center of pressure
Absolute pressure
Non-uniform flow
Potential energy

Mouth piece

Co-efficient of velocity

Current meter

Critical velocity

Wetted perimeter

Loss of head due to sudden enlargement

Chezy's formula for discharge

Major loss in pipe

Differentiate b/w liquid & gas

Define dynamic viscosity & kinematics viscosity

Derive formula for pressure on vertical plane submerged surface

Write short note on differential monometer

State bernoulli’s theorem. Write assumption in its derivations.

What is continuity equation? Drive an expression for continuity equation

What is venturimeter? Give formula of discharge through venturimeter.

What is pitot tube? How will you determine the velocity of any point with pitot tube.

Differentiate b/w notch & weir.

What is significance of remold’s number?

What do you mean by hydraulic gradient line and total energy line?

What is water hammer?

Derive the conditions for rectangular channel of the best section.

Give the difference b/w flow through open channel and flow through pipe.

Give the loss of head due to obstruction in a pipe with sketch.

Surface  tension

Reynolds’s  number

Fluid mechanics

Turbulent flow

Bernoulli’s theorem

Adhesion

Hydraulic gradient line

Open channel

Total energy line

Water hammer

Continuity equation

Write a note on differential manometer

What is the difference between laminar flow and turbulent flow

What do you mean by co-efficient of discharge of contraction

Explain Pascal’s law

What do you mean by notch? Name the various types of notches

Write  a short note on bounder gauge

Explain loss of head due to sudden contraction.

Explain loss of head due to sudden enlargement.

What is the most economical section? Derive a expression for most economical rectangular  section,

State and prove Bernoulli’s theorem

Fluid mechanics.

Discharge.

Surface tension

Adhesion

Open channel

Continuity equation

Piezometer

Ideal fluid

Hydraulic gradient line

Transition losses

Inclined plane

Sudden contraction

What is a fluid and how are these classified ?

What is capillarity ?derive expression for height of capillary rise.

A rectangular tank 5 metres long and 3 meterswide contains water up to a depth of 3.5m calculate the pressure on the base of the tank .

Describe with the help of neat sketches the different types of manometers.

A tube is inserted in a  pipe carrying oil of specific gravity 0.85, the oil rises in the tube to a height of 0.45m. Determine the pressure in the pipe in n/m2.

Derive the equation of continuity of flow.

Derive an expression for the discharge over a rectangular weir with velocity to approach.

The water is flowing with the velocity of 4.5m/s in a pipe of length 2850m the diameter of the pipe is 35cm. A value is provided at the end of the pipe it is closed in 30 seconds. Determine the rise in pressure if the velocity of pressure wave that is c=1410m/s.

Explain laminar and turbulent flow through Reynolds experiment.

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Top 101 Interview Questions and Answers of Construction Material ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced

 The idea of this post Top 101 Interview Questions and Answers of Construction material ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced is to give an idea of questions to viewers of this post.  Top 101 Interview Questions and Answers of Construction material ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced are beneficial for students as well as candidates appearing for interviews.

Define metamorphic rocks.

Define fat lime.

What do you mean by hydration of cement?

Name two types of glasses.

Write two uses of lime.

Name two types of timber.

What is a modular brick?

What do you mean by thermal Insulation?

Define compressive strength.

What are polymers?

What are the Paver blocks?

What is water paint?

What is the function of silica in cement?

Write the role of Gypsum in cement.

Define stone ware.

What are the requirement of good building stones?

Write a note on storage of cement.

What is water cement ratio? How it effects the strength of concrete?

Enumerate various defects if Timber.

What is the purpose of seasoning of timber?

Write a note on cement paints.

Name four construction chemicals.

Write the properties & use iof wired glass.

List the functions of ingredient of OPC.

Enlist the uses of varnishes.

Give advantages of timber.

Name different types of cement.

Write a short note on compaction.

Give properties of mild steel.

What are Bitumen sheets, give their uses?

Explain slump test of cement concrete.

Briefly describe the working of "BULL TRENCH" Kline for burning of brick with neat sketch.

Discuss the characteristics and uses of Marble and Granite.

How will you test compressive strength of cement?

Define metamorphic rocks.

Name two sedimentary rocks.

Define construction material.

Define water absorption bricks..

Write the size of modular brick

The final setting time of ordinary Portland cement should not be more than……

Define mounding of bricks.

Name two laboratory tests on Tiles.

Why gypsum is added in cement?

Name any two defects in Timber

Name any two ferrous material.

Define rapid hardening cement

What is fiber board

Define quick lime

What do you mean by oil paints?

define thermal insulation

Define veneers.

Write four requirements of a good building stone

Write a note on efflorescence in bricks

Write a not on kota stone

Make a line diagram of Bull's Trench k1/n

Precautions in storage of cement

Enlist properties of Timber

Write various commercial forms of Plastics

What is the commercial us of Aluminum in civil engg

Write a note on classification of plastics

Name some Heat insulation materials

Enlist types of paints

Write a note on various forms of Glass available in the market

Highlight the importance of initial setting time of cement

Define LACQUER, Write its uses

Write a note on use of Fiber Boards

Write a explanatory note on testing of bricks.

Write a note on 1. Soundness of cement 2. Seasoning of Timber

What are the various types of cements? Write their specific uses.

Write a report on common timber in India. Write their uses.

Write a note on - 1. Calcinations and kating of lime 2. Water paints.

Why gypsum is added during the manufacturing of cement?

What is rapid hardening cement?

What are sun dried bricks?

Give functions of iron oxide in the manufacturing of bricks.

What re clamps?

Define quick lime.

Differentiate between wood and timber.

Name any two solvents used in cement paints.

What is high carbon steel?

What is the effect of carbon on steel?

What is cello Tec?

Name various types of igneous rocks.

What are ceramic tiles/Give their uses.

What are the raw materials used in the manufacturing of cement?

Write the uses of lime.

What is plywood? Write its uses.

Give the properties and use of cast iron.

Explain briefly different water proofing components.

Explain the characteristics and uses of granite and lime stone.

What is mounding of bricks? Explain hand mounding and table mounding.

Define seasoning of timber.

Explain the various constituents of an oil paint.

Write notes on the following: (a) Asbestos based products. (b) Rapid hardening and low heat cements.

What is sedimentary rock?

What is Frog?

The standard dimension of an ideal Brick as per BIS are__________

What is Fat Lime?

Gypsum is added to control the ____ of cement.

Annual rings represent ____________of the tree.

The thinner used for oil paints is__________

The principle are Aluminum is known as________

Pigment are added to Plastics to Provide__________

Give one name of the material used for sound insulation.

Wired glass is used for ___________

Bituminous felts are used largely for ___________

What are the characteristics of good bricks?

Define (i) Quick lime (ii) Hydrated lime (iii) lump lime

What are the requirement for good building stones?

How is Cement stored in go down? Why is it necessary to take special precaution for storing cement?

What are common defects in timber?

Describe the process of painting a new iron work?

Describe in detail the burning of bricks in Bull Trench Kiln.

Mention the various uses of copper in engineering works.

What are the various methods of seasoning timber? Describe in brief.

What is Varnish? What is the composition of Varnish? What are the qualities of a good varnish?

Write details note on water proofing materials 

Write details note on Products of plastics used in civil engg. Write details note on Calcination and slaking of lime 

Write details note on flow diagram of manufacturing of cement by wet process.

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Top 101 Interview Questions and Answers of Building Construction ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced

 The idea of this post Top 101 Interview Questions and Answers of Building Construction ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced is to give an idea of questions to viewers of this post.  Top 101 Interview Questions and Answers of Building Construction ( Civil Engineering ) Asked in Interviews and Exams for Freshers and Experienced are beneficial for students as well as candidates appearing for interviews.

Under reamed pile

Mortar

Quion

Jamps

Haunch

Intrados

Lock Rail

Base course

Hip

Baluster

Priming Coat

Super structure

What is foundation? Where it is used?

Explain briefly different types of walls..

Differentiate between elliptical and parabolic arch.

What factors are considered for the selection of site for industrial building.

What are the spiral stairs? Explain with the help of sketch.

Explain chemical used in anti-terminate treatment

What is bond? What is its necessity? Differentiate between English and Flemish bond.

Explain various types of damp proofing materials.

Discuss application of paints on wooden and steel surfaces.

What are common repair problems in buildings? How these problems can be solved?

What is Stone flooring.

Fiber boards.

Flush door.

Shallow Foundation

Reveals

Natural bed

Springing line

Topping

Purlin

Breast wall

Corbel

Underpinning

Chaukhat

Cellotex

How surface excavation is carried out?

What are the brick arches? How these are constructed?

Give the constructional details of a wooden partition wall.

Explain plaster boards as a ceiling material.

What are the quarter turn and half turn stairs? Explain with sketches.

How the maintenance of public health services is carried out?

Explain the methods of laying bricks in walls. How the bonding of new brickwork with old is carried out?

Define dampness. Discuss its sources.

Describe with sketches the method of construction of timber flooring and give their specifications.

Explain in details color washing and dis tempering.

Write note on  Treatment of masonry foundations planning of building services

Write note on Parallel and glazed door

Write note on Superstructures

What is Brick bat.

Hazardous Buildings.

Queen closer.

Dampness

Hold fasts.

Pitched roof.

Non load bearing wall.

Sill.

Arch.

Arch ring.

Rise of an arch.

Tread.

Door closure.

Curing.

Baluster

Bond

Name different type of pointing.

What is the purpose of anti termite treatment in a building?

Write a note on scaffolding.

What is the purpose of foundation in a building ?

Write a brief note on deep foundations.

Write names of tools used in building construction.

What do you understand by interior decoration?

Make a neat diagram ofterrazo flooring.

Name different type of shallow foundations.

Name any three anti termite chemicals.

Write a note on false ceiling.

Write a note on cement paints.

What is "Vastu Shastra"?

Write any four factors to be considered while selecting a site for a residential building.

Explain the various methods of bonding new brick work with old brick work.

What are the sources of dampness in a building?

Explain different types of stone masonary.

Write a detailed note n building services.

Name various types of layout of stairs support your answer with free hand sketches.

Recreational buildings

Pitched roof

Basement

Lintel

Centering & shuttering

Handrail

Landing

Header

Stretcher

Brick bat

Scaffolding

Substructure

Pile foundation

Building construction

Parapet

Bond

Assembly buildings

What is the necessity of bond in a brick work?

Differentiate between office buildings & commercial buildings.

Write four principals to be observed in construction of stone masonry walls.

Write a short note on shallow foundation

What are the various material used in the construction of a buildings

Difference between English & Flemish bond.

Name method of bonding new brick work and old brick work

Write a short note on steel scaffolding.

Differentiate between precast and cast in site. Piles.

What do you under stand by post construction termite treatment in a buildings

What to you know about various part s of a buildings?

Write a short note on a cement paints.

What is different between rise & riser in a stair

Difference between storage buildings &hazardous buildings.

Define dampness, what are the causes & ill effect of dampness?

Explain different types of pointing.

Write a detailed note on doors.

Write about various types of floors, support your answer with free hand sketches.

Doglegged stair

Purpose of foundation in a building.

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