Belt Conveyors Offer Starting Torque Mcq
6 100 t fulllo 50 slip 0 0 no load load full load 50 100 figure 4 percent motor slip as a function of motor load by using a tachometer to measure actual motor speed it.[email protected]
visit us:zhengzhou . china
mail us:[email protected]
Service Hours8:00 AM - 22:00 PM
A lamp with a reflector is mounted 12m above the center of a circular area of 24 meters diameterif the combination of the lamp and reflector gives a uniform candle power of 1000.
A pugmill mixer also known as a pug mill or paddle mixer is a type of horizontal continuous mixer used throughout a variety of industries to combine solid and liquid feed components into a homogeneous mixture pugmill mixers are chosen for especially demanding settings in which the materials require a tough but thorough mixing action due to consistency abrasivity corrosiveness or other.
A servo control loop uses sensor feedback to determine whether the systems actual state position velocity or torque matches the commanded state but sensors feedback isnt perfect even highquality encoders and sensors can introduce noise phase lag and other errors in measurement one way to improve the feedback of a servo control.
A torque is a special form of force that turns an axle in a given direction it is sometimes called a rotational force you can create a torque by pushing on a rod or lever that rotates an axle likewise a torque on an axle can result in a linear force at a distance from the center of the axle torque equals force multiplied by moment arm.
Answer a low cost show answer 39 an electric train employing a dc series motor is running at a fixed speed when a sudden slight drop in the mains voltage occurs this would result in a drop in speed and rise in current b rise in speed and drop in current c rise in speed and rise in current.
B starting torque and running torque are nearly equal 229 belt conveyors offer a zero starting torque b low starting torque c medium starting torque control of electric drives multiple choice questions and answers important mcq of control of electric drives.Details
Belt conveyor offer which starting torque machine mining belt conveyors offer torque downhill belt conveyors totalweb lite downhill belt conveyors the starting and speed control thereof g surtees 1 introduction through the monitoring of the belt speed feedback the brake torque can be controlled using a simple hydraulic valve to regulate.Details
Belt conveyors are designed to carry a wide variety of bulk materials and packed bags boxes pouches etc for various industries belt conveyors are economical and efficient conveying of materials over long distances either in horizontal or limited inclines.Details
Belt conveyors offer starting torque a high b low c medium d zero view answer a high 3 while selecting a motor for airconditioner the feature of utmost importance is a type of enclosure b type of bearing c noise d power transmission arrangement view answer c noise 4 light duty cranes are generally used in.Details
C high starting torque d reversibility discussion b belt conveyors offer starting torque a high b low c medium d zero discussion a question and answers in control of electric drives control of electric drives multiple choice questions and answers important mcq of control of electric drives solved mcqs for.Details
D irectonl ine s tarter it is simple and cheap starter for a 3phase induction motor the contacts close against spring action this method is normally limited to smaller cage induction motors because starting current can be as high as eight times the full load current of the motor use of a double cage rotor requires lower staring current approximately four times and use of quick.Details
5 belt conveyor design dunlop 1 conveyor belt technique d e s i g n a n d c a l c u l at i o n 2 i index 1 introduction 11 foreword 12 development chronology development aims 13 dunlopenerka test rig 2 belt conveyors 21 basic sketch concept description 3.Details
Electrical machines in a 3 im with line frequency f1 and winding factor kw1 and kw2 for stator and rotor respectively the ratio of per phase stator winding emf e1 to per phase rotor winding emf e2 at standstill is given by.Details
Generally the starting torque for such drives is limited to 160 percent of the full load torque and the pull out torque is limited to 200 percent to 250 percent of the full load torque the motors are also normally designed for 15 percent overload for 15 seconds and 20 percent overload for 10 seconds taking into consideration the adverse.Details
High starting torque applications of dol and reverse dol starters particularly rdol starter is used for conveyor belts which often require movement on both sides used in where a high starting inrush current does not cause damage to an induction motor used for 3 phase induction motor is low power rating up to 5 hp.Details
High starting torque explanationbelt conveyors are designed to carry a wide variety of bulk materials and packed bags boxes pouches etc for various industries belt conveyors are economical and efficient conveying of materials over long distances either in horizontal or limited inclines.Details
High torque on a conveyor belt dc series motors will have a starting torque as high as 500 compared to the normal operating torque ques 87 this multiple choice questions is best this explanation is show good these mcq is very important for my prepration these is very short and easy.Details
In case belt conveyors has the least value of starting torque to full load torque ratio torque inversely varies with the speed in the windage load torque component the starting torque in case of centrifugal pumps is generally the starting torque of a dc motor is independent of which of the following in case of centrifugal pumps the starting torque is generally.Details
In this page you can learn various important industrial drive multiple choice questions answers mcq on industrial drive short questions and answers on industrial drive sloved industrial drive objective questions answers etc which will improve your skill.Details
what is the three phase induction motor working principle like any electric motor a 3phase induction motor has a stator and rotor the stator carries a 3phase winding called stator winding while the rotor carries a short circuited winding called rotor wind ing only the stator winding is fed from 3phase supply the rotor winding derives its voltage and power from the externally.Details
21 in case of kiln drives a starting torque is almost zero b starting torque and running torque is nearly equal c starting torque is more than double of the running torque d.Details
a variable frequency drive vfd is a type of motor controller that drives an electric motor by varying the frequency and voltage supplied to the electric motor other names for a vfd are variable speed drive adjustable speed drive adjustable frequency drive ac drive microdrive and inverter frequency or hertz is directly related to the motors speed rpms.Details
arrangement of a belt conveyor crosssection of belt for conveyor system selectionof belt conveyor 1 amount of material to be conveyed 2 continuity of operation needed 3 size of lumps 4 distance of transportation 5 environmental allowance 6 gradient 7 method of coal winning ie longwallor bord and pillar 32 8 capital available.Details
the starting torque varies with the square of the starting current when reduced voltage methods applying less than full line voltage to the motor during starting are used the starting current amp torque will be lower eg conveyor belt special offer to slideshare readers.Details
in addition to helping you identify types of sprockets the following guidelines will help you identify options that may offer improved performance and longer service life proper replacement at the appropriate time will reduce downtime and save you money fig 1 how to measure chain pitch sprocket identification amp terminology step 1.Details
a these motors have high starting torque b these motors are not selfstarting c back emf of these motors is zero initially d to restrict armature current as there is no back emf while starting ans d 11 in dc shunt motors as load is reduced a the speed will increase abruptly b the speed will increase in proportion to.Details
Overall the dol starter being cheaper amp due to its full voltage supply at startup should be used for low power machines to avoid any damage while the soft starter must be used for high power machines where low or medium starting torque amp smooth starting amp stopping is necessary like in conveyor belts cranes water pumps etc related posts.Details
Power transmission through belts ppt 1 power transmission through belts 2 introduction a belt is a loop of flexible material used to mechanically link two or more rotating shafts most often parallel belts may be used as a source of motion to transmit power efficiently or to track relative movement belts are looped over pulleys and may have a twist between the pulleys and the shafts.Details
there are many electrical components are used in the electronic and electrical circuit like a resistor inductor diode transformer capacitor and many more without these electrical components the circuit is incomplete each part has a different function in the circuit so they are the most important components of the circuit all these basic electrical components found in all motherboards.Details
very long belt conveyors transporting ore and other products often rely on conveyor belt idlers to form troughs in the belts to better contain the conveyed materials conveyor systems a summary this guide provides a basic understanding of conveyor system varieties considerations for use their applications and industrial uses.Details
Some booms are equipped with a jib which is the lattice structure attached to the end of the boom on the 70ton hydraulic truck crane the jib is 67 feet 204 meters long giving the crane a total length of 194 feet 591 meters as the load is lifted the sections telescope out to the desired height.Details
Split phase induction motors have low starting current and moderate starting torque so these motors are used in fans blowers centrifugal pumps washing machine grinder lathes air conditioning fans etc these motors are available in the size ranging from 005 kw to 05 kw.Details
The smooth startup amp controlled acceleration of the soft starter makes it a perfect candidate to be used in conveyor belt amp pulley system and cranes since it reduces the input voltage that corresponds to the input current which is directly proportional to the starting torque of the induction motor it significantly reduces the starting torque.Details
The standard belt conveyor is a prime example in constant horsepower applications the horsepower required remains constant while the torque drops off as a ratio of 1speed2 example of this application is a center driven winder centrifugal fanspumps are example of variable torque system.Details
Therefore it is suitable for constant speed drive where high starting torque is not required such as pumps blowers fan lathe machines tools belt or chain conveyor etc service motors it has high starting torque amp its speed is inversely proportional to the loading conditions ie when lightly loaded the speed is high and when heavily.Details