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Recent questions tagged of
asked
Jan 6
by
anonymous
Names and formulae of substances
Names and formulae of substances
Last answer:
Think about what you call your friends. Some of your friends might have full names (long names) and a nickname (short name). These are the words we use to tell others who or what we are ... that was used earlier, the compound name is a combination of the names of the elements but slightly changed.
names
and
formulae
of
substances
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1
answer
asked
Jan 2
by
anonymous
State importance of colour scheme for pattern. Illustrate a common colour scheme.
State importance of colour scheme for pattern. Illustrate a common colour scheme.
Last answer:
Importance of Color coding used for pattern - Identify the core prints, loose pieces etc. - Identify quickly the main body of the pattern and different parts of the pattern to form the main body of ... for loose pieces Black strips on yellow base:- Stop offs Clear or No colour:- Parting surface
importance
of
colour
scheme
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1
answer
asked
May 7, 2020
by
anonymous
State the procedure for testing of earth pit resistance with necessary diagrams.
State the procedure for testing of earth pit resistance with necessary diagrams.
Last answer:
Following procedure (Method) for testing of earth pit resistance with necessary diagrams. 1) Earth Tester : i) Three point method ii) Four point method 2) By Potential drop method 3 ... of that earthing pit. In this test the accuracy is less but electrical rods are not required.
state
the
procedure
for
testing
of
earth
pit
resistance
with
necessary
diagrams
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1
answer
asked
May 7, 2020
by
anonymous
State the procedure for laying / installation of underground cable.
State the procedure for laying / installation of underground cable.
Last answer:
1) Direct laying Cable: or Trench laying method: Procedure: * For laying of a cable trench about 1.5m deep and 0.5m wide is made along the cable route. * A ... over. * Cables laid in this manner are usually plain lead covered because troughing affords good mechanical protection.
state
the
procedure
for
laying
installation
of
underground
cable
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1
answer
asked
May 7, 2020
by
anonymous
Explain HRGO and CRGO. State benefits of CRGO for manufacturing of core.
Explain HRGO and CRGO. State benefits of CRGO for manufacturing of core.
Last answer:
i) HRGO ( Hot -rolled grain oriented steel): * To minimize the size of machine flux density should be high with small magneto motive force (MMF). Due to this iron loss will ... percentage of silicon which in turn increases the resistance compared to regular steel which reduces eddy currents.
explain
hrgo
and
crgo
state
benefits
of
for
manufacturing
core
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337
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1
answer
asked
May 7, 2020
by
anonymous
State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.
State any two advantages of MCB over Fuse. State the standard specifications of MCB available in the market.
Last answer:
Following advantages of MCB over Fuse: 1. No need of replacement of fuse wire. 2. Manually restore of supply is simple. 3. Fault understanding by visual inspection 4. More safe than fuse The standard specifications of ... 6A, 10A,16A,20A, 25A, 30A, 32A, 40A, 50A, 60A and 63A 6. 250V and 450 v
state
any
two
advantages
of
mcb
over
fuse
the
standard
specifications
available
in
market
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103
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1
answer
asked
May 7, 2020
by
anonymous
State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material.
State two applications of : (i) PVC paper (ii) Porcelain with type of class based on withstand temperature is insulating material.
Last answer:
(i) Application of PVC paper : 1. It is used in slot lining or motor winding insulation purpose 2. For Insulation of Transformer winding (ii) Application of Porcelain : 1. Mainly used for manufacturing ... on withstand temperature : * H' & C' Class of insulation i e. 180° and above 180°C
state
two
applications
of
i
pvc
paper
ii
porcelain
with
type
class
based
on
withstand
temperature
is
insulating
material
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69
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1
answer
asked
May 7, 2020
by
anonymous
Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Select insulating materials for following parts : (i) Insulation between heating element and base plate of electric iron. (ii) Insulation used over copper or aluminium conductor used for making coils. (iii) Transformer bushings. (iv) Insulation between transmission line and pole.
Last answer:
Parts Insulating Materials Insulation between heating element and base plate of electric iron. Mica Insulation used over copper or aluminium conductor used for making coils. ... Transformer bushings Porcelain Insulation between transmission line and pole. Porcelain
heating
element
and
base
plate
of
electric
iron
ii
used
over
copper
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68
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1
answer
asked
May 7, 2020
by
anonymous
Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties.
Explain the suitability of aluminium as an electrical conductor with respect to its mechanical and electrical properties.
Last answer:
Following are requirements of conductor:- i) High conductivity : Material should have high conductivity, So that * cross section of conductor (size) reduces, * Copper losses reduces, * So Efficiency ... . Boiling point is 1820°C 9. Specific gravity is 2.7 10. High resistance to corrosion.
explain
the
suitability
of
aluminium
as
an
electrical
conductor
with
respect
to
its
mechanical
and
properties
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1
answer
asked
May 7, 2020
by
anonymous
State the type of insulating materials under Class Y and Class B.
State the type of insulating materials under Class Y and Class B.
Last answer:
The type of insulating materials under Class Y : 1. Cotton 2. Silk 3. Paper 4. Rubber 5. PVC The type of insulating materials under Class B: 1. Backelite 2. Impregnated varnish 3. Mica 4. Fiber glass 5. Asbestos
state
the
type
of
insulating
materials
under
class
y
and
b
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1
answer
asked
May 7, 2020
by
anonymous
State the types of protections provided by MCB.
State the types of protections provided by MCB.
Last answer:
The types of protections provided by MCB: 1. MCB provides short circuit protection. 2. MCB provides overload protection
state
the
types
of
protections
provided
by
mcb
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1
answer
asked
May 7, 2020
by
anonymous
State different types of holders used in wiring installation.
State different types of holders used in wiring installation.
Last answer:
Following types of holders used in wiring installation: 1. Pendent Holder 2. Batten Holder 3. Angle holder 4. Screwed holder
state
different
types
of
holders
used
in
wiring
installation
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1
answer
asked
May 7, 2020
by
anonymous
Types of rolling mills and its applications
Types of rolling mills and its applications
Last answer:
Types of rolling mills and its applications (1) Two-high rolling mill: used in blooming and slabbing mills (2) Three-high rolling mill: used for making plates or sections. (3) Four- ... : This mill is used for rolling stainless steel and other high strength steel sheets of thin gauge.
types
of
rolling
mills
and
its
applications
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1
answer
asked
May 7, 2020
by
anonymous
Types of slotting machine
Types of slotting machine
Last answer:
1. Puncher slotter 2. Precision slotter 3. Production slotter Working Principle of Slotting machine:- The slotting machine is a reciprocating machine tool in which, The vertical slide holding the cutting ... longitudinal and cross feeds, a rotary feed motion is also provided in the work table.
types
of
slotting
machine
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1
answer
asked
May 7, 2020
by
anonymous
Explain with neat sketch the working principle of MIG.
Explain with neat sketch the working principle of MIG.
Last answer:
In metal-arc inert gas welding the Weld area is shielded by an effectively inert atmosphere of argon, helium, carbon dioxide, or various other gas mixtures . The consumable bare Wire is fed automatically ... of the molten-weld puddle. Multiple-weld layers can be deposited at the joint.
explain
with
neat
sketch
the
working
principle
of
mig
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67
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1
answer
asked
May 7, 2020
by
anonymous
Explain any four properties of Moulding sand.
Explain any four properties of Moulding sand.
Last answer:
1. Porosity: Molten metal always contain a certain amount of dissolved gases, which are evolved when the metal freezes the molten metal coming in contact with the moist sand , generates steam or ... to the casting. Refractoriness is measured by the sinter point of the sand rather than its melting
explain
any
four
properties
of
moulding
sand
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1
answer
asked
May 7, 2020
by
anonymous
State the applications of TIG welding.
State the applications of TIG welding.
Last answer:
The applications of TIG welding are as follows: 1. Mostly used to weld aluminum and aluminum alloys. 2. It is used to weld stainless steel, carbon base alloy, copper base alloy, nickel base alloy etc. 3. It is used to welding dissimilar metals. 4. It is mostly used in aerospace industries.
state
the
applications
of
tig
welding
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1
answer
asked
May 7, 2020
by
anonymous
State the applications of rolling.
State the applications of rolling.
Last answer:
Applications of rolling are as follows: 1. Concrete reinforcing bars. 2. Plates. 3. Wire rods. 4. Sheet and strip. 5. Rails. 6. Piping and tubes. 7. Body panels. 8. Construction materials
state
the
applications
of
rolling
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1
answer
asked
May 7, 2020
by
anonymous
List types of chips produced in machining process.
List types of chips produced in machining process.
Last answer:
The various types of chips produced in machining process are as follows: 1. Continuous chips: According to its name, continuous chips have a continuous segment. . 2. Discontinuous chips or segmental chips: ... chip is same as the continuous chips except a built edge is form at the face of tool.
list
types
of
chips
produced
in
machining
process
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1
answer
asked
May 7, 2020
by
anonymous
List different starting methods of three phase synchronous motor. Explain any one of them.
List different starting methods of three phase synchronous motor. Explain any one of them.
Last answer:
Different Starting Methods of Three Phase Synchronous Motor: As synchronous motor is not self starting, different methods of starting are as follows: 1) By using an Induction (Pony) motor 2) ... . The rotor gets pulled into synchronism and starts running at constant speed as a synchronous motor.
list
different
starting
methods
of
three
phase
synchronous
motor
explain
any
one
them
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1
answer
asked
May 7, 2020
by
anonymous
Define armature reaction in an alternator. Explain the effect of armature reaction at various P.F. of loads of alternator.
Define armature reaction in an alternator. Explain the effect of armature reaction at various P.F. of loads of alternator.
Last answer:
Armature Reaction: The effect of armature flux on main flux is called as armature reaction. Armature Reaction at Various Power Factors: When armature is loaded, the armature flux modifies ... lagging p.f. For capacitive loads the effect of flux is partly distorting and partly strengthening.
define
armature
reaction
in
an
alternator
explain
the
effect
of
at
various
p
f
loads
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128
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1
answer
asked
May 7, 2020
by
anonymous
State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.
State the modification to be done in dc series motor to work satisfactorily as ac series motor. State applications of ac series motor.
Last answer:
Modifications are necessary in a dc series motor so that it operates satisfactorily on ac supply. The modifications are as follows: 1) AC series motor is built with a few field turns as ... and grinders 5) High speed vacuum cleaners 6) Sewing machines 7) Food processors 8) Drilling machine
state
the
modification
to
be
done
in
dc
series
motor
work
satisfactorily
as
ac
applications
of
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1
answer
asked
May 7, 2020
by
anonymous
Explain the activities carried out during weekly maintenance of 3 ph. Induction motor.
Explain the activities carried out during weekly maintenance of 3 ph. Induction motor.
Last answer:
Activities Carried out During Weekly Maintenance of 3 ph. Induction Motor: 1) Check belt tension. In cases where this is excessive it should immediately be reduces and in the case of sleeve ... and cooled by oil mist systems its important to check the oil mist flow paths/pressure components.
explain
the
activities
carried
out
during
weekly
maintenance
of
3
ph
induction
motor
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1
answer
asked
May 7, 2020
by
anonymous
Explain construction and working of AC servomotor.
Explain construction and working of AC servomotor.
Last answer:
Construction of AC Servo Motor: AC servo motor is mainly composed of a stator and a rotor. Laminated stator core is usually made of silicon steel. Two phase windings are placed in the stator slots at 90 degree ... on rotor. Due to the force or torque acting on the rotor, it is set in motion.
explain
construction
and
working
of
ac
servomotor
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1
answer
asked
May 7, 2020
by
anonymous
Describe with neat sketch working of hysteresis motor.
Describe with neat sketch working of hysteresis motor.
Last answer:
Working: When stator is energized with single phase ac supply, rotating magnetic field is produced because of starting (auxiliary) and main windings, which remain in circuit permanently. The ... the principle of magnetic locking this motor either rotates at synchronous speed or not at all.
describe
with
neat
sketch
working
of
hysteresis
motor
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1
answer
asked
May 7, 2020
by
anonymous
List applications of stepper motor.
List applications of stepper motor.
Last answer:
Applications of Stepper Motor: 1) Computer controlled systems 2) Numerical control of machine tools 3) Tape drives 4) Floppy disc drives 5) Computer printers 6) X-Y plotters 7) ... ) Extruders 21) Engravers 22) Analytical and Medical instruments 23) Embroidery Machines 24) Packaging Machines
list
applications
of
stepper
motor
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1
answer
asked
May 7, 2020
by
anonymous
State advantages of rotating field type alternators.
State advantages of rotating field type alternators.
Last answer:
Advantages of Rotating Field Type Alternator: 1) For high-voltage alternator, large space is required to accommodate conductors with insulation, as high voltage is induced in them. If field poles are placed ... is kept rotating. 8) Rotating field is comparatively light and can run with high speed.
state
advantages
of
rotating
field
type
alternators
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59
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1
answer
asked
May 7, 2020
by
anonymous
State advantages of short pitch winding over full pitch winding in alternators.
State advantages of short pitch winding over full pitch winding in alternators.
Last answer:
Advantages of Short Pitch Winding over Full Pitch Winding in Alternators: 1) Short pitching reduces the amount of copper needed for end connection when compared with full pitched coil. 2) They ... reduced, thereby increasing the efficiency. 4) The power quality of generated emf is improved.
state
advantages
of
short
pitch
winding
over
full
in
alternators
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211
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1
answer
asked
May 6, 2020
by
anonymous
Give the full form of SCADA & HMI.
Give the full form of SCADA & HMI.
Last answer:
Full Form of SCADA and HMI: SCADA:-Supervisory Control and Data Acquisition HMI :- Human Machine Interface
give
the
full
form
of
scada
&
hmi
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62
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1
answer
asked
May 6, 2020
by
anonymous
List types of timers.
List types of timers.
Last answer:
Types of Timers: Retentive Timers: 1. ON Delay 2. OFF Delay Non Retentive Timers: 1. ON Delay 2. OFF Delay
list
types
of
timers
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52
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1
answer
asked
May 6, 2020
by
anonymous
Draw the block diagram of PLC.
Draw the block diagram of PLC.
Last answer:
Block diagram of PLC and input/output devices used for PLC Input/output devices - The input module has bank of terminals for physically connecting input devices, like push buttons, limit switches etc. ... is to translate signals from the PLC's CPU into a form that the output device can use.
draw
the
block
diagram
of
plc
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157
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2
answers
asked
May 6, 2020
by
anonymous
State the need of automation.
State the need of automation.
Last answer:
Need of Automation in Process : * To fulfill the demand of product at right time. * To reduce the human errors and involvement of human being in the process. * For better productivity. * For better ... of process. * For better quality. * For reducing man power. * For reducing cost of product.
state
the
need
of
automation
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1
answer
asked
May 6, 2020
by
anonymous
Give the expression for ABCD constant of T model.
Give the expression for ABCD constant of T model.
Last answer:
Expression for ABCD constants of T model:
give
the
expression
for
abcd
constant
of
t
model
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1
answer
asked
May 6, 2020
by
anonymous
State the impact of inductance and resistance on transmission line performance
State the impact of inductance and resistance on transmission line performance
Last answer:
Impact of inductance on transmission line: 1) It causes IXL drop in transmission line which affects regulation. 2) It is the only parameter which decides power transmission capacity of line i. ... is very small, it causes losses, temperature rise& poor voltage regulation so it cannot be neglected
state
the
impact
of
inductance
and
resistance
on
transmission
line
performance
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84
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1
answer
asked
May 6, 2020
by
anonymous
Draw equivalent circuit of alternator.
Draw equivalent circuit of alternator.
Last answer:
Equivalent circuit of alternator
draw
equivalent
circuit
of
alternator
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117
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1
answer
asked
May 5, 2020
by
anonymous
State properties of conductor material used for overhead conductor.
State properties of conductor material used for overhead conductor.
Last answer:
Following are the properties of conductor material:- 1. High conductivity :- Material should have high conductivity 2. High mechanical strength:- Material should have sufficiently high mechanical strength ... available & less costly. 9. Scrap Value: - Material should have high scrap value.
state
properties
of
conductor
material
used
for
overhead
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72
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1
answer
asked
May 5, 2020
by
anonymous
State the classification of distribution substation.
State the classification of distribution substation.
Last answer:
The classification of distribution substation. 1. Pole mounted distribution substation 2. Plinth mounted distribution substation 3. Compact/prefabricated distribution substation 4. ... Indoor distribution substation 6. Outdoor distribution substation 7. Mobile distribution substation
state
the
classification
of
distribution
substation
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1
answer
asked
May 3, 2020
by
anonymous
State the needs and benefits of star labelling.
State the needs and benefits of star labelling.
Last answer:
Needs of star labelling: * Star labelling is meanly required to recognize quality of product * Star labelling is also required to determine life and efficiency of the product. * Star labels ... emission and air pollution will be reduces. 5. Market efficiency and compilation will be improve.
state
the
needs
and
benefits
of
star
labelling
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199
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1
answer
asked
May 3, 2020
by
anonymous
List the different types of tariff.
List the different types of tariff.
Last answer:
Various types of Tariff:- 1) Flat-demand Tariff 2) Simple-demand Tariff or Uniform Tariff 3) Flat-rate Tariff 4) Step-rate Tariff 5) Block-rate Tariff 6) Two-part Tariff 7) Maximum demand Tariff ... c) KW and KVAR Tariff 10) TOD (Time of Day) Tariff 11) TOU ( Time of Usage) Tariff
list
the
different
types
of
tariff
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63
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1
answer
asked
May 3, 2020
by
anonymous
State the advantages of cogeneration.
State the advantages of cogeneration.
Last answer:
Advantages of co-generation: 1) Co-generation can meet both power & heat requirements. 2) Less cost than conventional generation. 3) Higher system efficiency due to energy wastage is highly ... reduces due to cogeneration plant is located in same premises. 10) It can maintain grid stability
state
the
advantages
of
cogeneration
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1
answer
asked
May 3, 2020
by
anonymous
List functions of MEDA.
List functions of MEDA.
Last answer:
Functions of MEDA: 1. To decide long term energy conservation policy's for Maharashtra state. 2. To coordinate with central government organization i.e NPC, MNRE etc for energy conservation policy ... our society. 6. To decide penalty, incentive, subsidy for energy conservation at state level.
list
functions
of
meda
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72
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1
answer
asked
May 3, 2020
by
anonymous
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Describe control of a single lamp from three places. Draw the relevant circuit diagram.
Last answer:
Single lamp control from three places- It consists of two way switches & intermediate switch, the circuit diagram is as shown in figure. We require two 2-way switches and one intermediate switch and a lamp ... position of any one switch is changed, then the lamp will be turned off.
describe
control
of
a
single
lamp
from
three
places
draw
the
relevant
circuit
diagram
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87
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1
answer
asked
May 3, 2020
by
anonymous
State the requirements of illumination scheme of shipyard.
State the requirements of illumination scheme of shipyard.
Last answer:
Requirements of illumination scheme of shipyard: 1) The shipyard lighting always depends upon the surrounding conditions. e.g. wind pressure, rain fall, location of shipyard from the sea-share etc. ... solar grass lamps, LED-Solar energy lawn lamps, various focus lamps, metal halide lamps etc.
state
the
requirements
of
illumination
scheme
shipyard
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56
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1
answer
asked
May 3, 2020
by
anonymous
State the various lighting calculations methods and Describe any one of them.
State the various lighting calculations methods and Describe any one of them.
Last answer:
Lighting calculation methods: 1. Lumens or Light flux method 2. Point to point or Inverse Square law method 3. Watts per Square meter method i) Lumens or Light ... is taken according to the illumination desired on an average value considering overall efficiency of the lighting system.
state
the
various
lighting
calculations
methods
and
describe
any
one
of
them
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1
answer
asked
May 3, 2020
by
anonymous
State the different types of outdoor flood lighting and where are they used.
State the different types of outdoor flood lighting and where are they used.
Last answer:
There are three types of projectors used for flood lighting : a) Narrow beam Projector b) Medium angle Projector c) Wide angle Projector a) Narrow beam Projectors: - Light beam with such ... yards, stadiums, car parking area etc. 3) It is used for illuminating advertisements, boarding's etc.
state
the
different
types
of
outdoor
flood
lighting
and
where
are
they
used
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68
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1
answer
asked
May 3, 2020
by
anonymous
State the purpose of lighting control. List the different types of dimmer.
State the purpose of lighting control. List the different types of dimmer.
Last answer:
Purpose of Lighting Control:- 1. To turn ON or OFF the lamps 2. For dimming: The dimming control permits the adjustment of lighting over a range. 3. For changing the lighting levels ... operated dimmer 6) Triac operated Dimmer 7) PWM (Pulse width modulation) Controlled technique.
state
the
purpose
of
lighting
control
list
different
types
dimmer
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1
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asked
May 3, 2020
by
anonymous
Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.
Analyze the effect of supply voltage on performance of LED as regards current, Lumen output, efficacy and life.
Last answer:
1) Effect on Current:- In LED current depends upon supply voltage, if voltage get changes then current also change but this change in current will be control by resistors which are connected in series. 2) ... 4) Effect on Life:- If supply voltage is not stable then life of LED get reduced.
analyze
the
effect
of
supply
voltage
on
performance
led
as
regards
current
lumen
output
efficacy
and
life
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1
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asked
May 3, 2020
by
anonymous
Explain the lighting scheme to be designed for each of the following: i) Special ward in hospitals ii) Dentist’s Cabin
Explain the lighting scheme to be designed for each of the following: i) Special ward in hospitals ii) Dentist’s Cabin
Last answer:
i) Special ward in hospital: For the patients in the wards, lighting should create a cozy and pleasant atmosphere. Lighting in the wards should be planned in such a way that it meets the specific ... we use such as cements and bonding agents that we use to restore your teeth back to health.
explain
the
lighting
scheme
to
be
designed
for
each
of
following
i
special
ward
in
hospitals
ii
dentists
cabin
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1
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asked
May 3, 2020
by
anonymous
Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
Describe the working principle of Thyristor operated dimmer with the help of circuit diagram.
Last answer:
Thyristor operated dimmer: A popular thyristor operated dimmer circuit employ TRIAC-DIAC phase control for low AC power control. During each half-cycle, the capacitor charges through (R1+VR1). When the ... time constant {C (R1+VR1)}. Thus by reducing VR1 the lamp brightness can be increased.
describe
the
working
principle
of
thyristor
operated
dimmer
with
help
circuit
diagram
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1
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asked
May 3, 2020
by
anonymous
State design considerations for illumination scheme of commercial complex.
State design considerations for illumination scheme of commercial complex.
Last answer:
Design considerations for illumination scheme of commercial complex: * Tasks to be performed in the space * Desired light levels based on the tasks performed in the space * Room size ... conditions * Cleanliness of the area during operation * Maintenance schedule * Availability of daylight
state
design
considerations
for
illumination
scheme
of
commercial
complex
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