# Tractive effort is required to?

Tractive effort is required to overcome the gravity component of train mass, overcome friction, windage and curve resistance, accelerate the train mass.

## Related questions

Last Answer : For given maximum axle load tractive efforts of AC. locomotive will be more than that of D.C. locomotive.

Last Answer : In case of locomotives the tractive power is provided by double cylinder, double acting steam engine.

Description : What's something you've accomplished that required a considerable amount of effort?

Last Answer : I convinced doctors and a sperm bank to deal with me even though I am single. It took a couple of years, but I finally made them understand that what I was doing was not unethical or immoral. Then I was able to have KatawaGrey.

Description : Have you ever given something or achieved something which wasn't worth the amount of effort you put in?

Last Answer : Absolutely. Most of the (few) awards I’ve ever received were not worth the effort.

Description : What is beyond your ability by a smidge?

Last Answer : Writing a novel.

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Description : Tractive effort acts  A) At 90° with respect to the rails measured in counter clockwise direction B) At 270° with respect to the rails measured in counter clockwise direction C) Tangential to the driving wheel D) For overcoming the effect of gravity only when a train is being hauled

Last Answer : Tractive effort acts Tangential to the driving wheel

Description : If the gross vehicle weight of a truck is 30 tonne and rolling resistance is 30 kg/tonne, then the tractive effort required to keep the truck moving at a uniform speed is (A) 30 kg (B) 300 kg (C) 900 kg (D) 1000 kg

Last Answer : (C) 900 kg

Description : A gradient along which the vehicle does not require any tractive effort to maintain a specified speed, is known as (A) Ruling gradient (B) Pushing gradient (C) Floating gradient (D) Minimum gradient

Description : Define (i) Draw Bar Pull (ii) Tractive Effort

Last Answer : (i) Draw Bar Pull: If the extra load attached to the vehicle is pulled by fully utilizing the excess power, then, maximum drawbar pull = Tractive effort Road resistance.  (ii) Tractive effort ... rear wheel tyres and the road. Therefore, the useful tractive effort is always less than the traction.

Description : weight of water, the hydraulic mean depth of the sewer and the bed slope w is the unit of the sewer, then the tractive force exerted by flowing water, is A. w r S S B. w r1/2 C. w r S D. w r2/3

Description : For calculating the tractive force along an upgrade of an asphalt road, the most probable value of the co-efficient of traction resistance is assumed (A) 1/10 (B) 1/20 (C) 1/30 (D) 1/100

Description : In case of cement concrete pavements, pick up the incorrect statement (A) Tractive resistance is low (B) Initial cost of construction is high (C) Initial cost of construction is low (D) Visibility during nights is high

Description : To compensate the loss of tractive force of vehicles along curves of radius R, the percentage reduction of gradient, is (A) 50/R (B) 75/R (C) 100/R (D) 125/R

Description : In alluvial channels carrying clear water, the ratio of maximum tractive shear stress on the slides and that on the channel beams approximately. a) 0.5 b) 1.76 c) 0.76 d) 1.5

Description : Tractive coefficient of a Crawler truck in loose soil is (a) Less than that of rubber tyre tractors (b) More than that of rubber tyre tractors (c) Same as that of rubber tyre tractors (d) Nearly zero

Last Answer : (d) Nearly zero

Description : electromagnets generally function as holding magnets. (a) Tractive (b) Portative (c) Either of the above (d) None of the above

Description : Tractive magnets are operated from (a) a.c. supply (b) d.c. supply (c) either a.c. or d.c. supply (d) none of the above

Last Answer : (c) either a.c. or d.c. supply

Description : A machine requires an effort of 10 kg to lift a load of 250 kg and an effort of 13 kg for a load of 400 kg. The effort required to lift a load of 500 kg will be a.25 kg b.107 dynes c.15 kg d.35 kg e.45 kg

Last Answer : c. 15 kg

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Last Answer : c) A reuse model

Description : Function points are used to measure the estimated _____ of a project.  a. complexity  b. effort required  c. program size  d. time required

Last Answer : c. program size

Description : In pursuing its quality control objectives with respect to assigning personnel to engagements, a public accounting firm may use policies and procedures such as a. Rotating employees from ... the staffing requirements of specific engagements so that enough qualified personnel can be made available

Last Answer : Requiring timely identification of the staffing requirements of specific engagements so that enough qualified personnel can be made available

Description : Why is it important to have a company blog hosted on the company web domain versus a third party blogging site?  Required by law  Search engine rankings will include hits on the blog as part of the overall website hits  Requires less effort to maintain Cannot be hacked easily

Last Answer : Search engine rankings will include hits on the blog as part of the overall website hits

Description : ………………….. means coordinated effort, to communicate the information of the system written form. A) System documentation B) Resource required C) Development schedule D) User Document

Last Answer : A) System documentation

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Last Answer : C) Multiple databases

Description : The number of function points of a proposed system is calculated as 500. Suppose that the system is planned to be developed in Java and the LOC/FP ratio of Java is 50. Estimate the effort (E) required to ... ) 25 person months (B) 75 person months (C) 62.5 person months (D) 72.5 person months

Last Answer : (C) 62.5 person months

Description :  lumen / watt is the unit of: A) light flux B) luminous intensity C) brightness D) luminous efficiency

Description :  Which braking system on the locomotives is the costliest among the following? A) Vacuum braking on diesel locomotives B) Vacuum braking on steam locomotives C) Regenerative braking on electric locomotives D) All braking systems are equally costly

Last Answer : Which braking system on the locomotives is the costliest among the following? A) Vacuum braking on diesel locomotives B) Vacuum braking on steam locomotives C) Regenerative braking on electric locomotives D) All braking systems are equally costly

Description : In practice generative breaking is used when (a) quick motor reversal is desired. (b) load has overhauling characteristic (c) controlling elevators, rolling mills etc. (d) none of these

Last Answer : Controlling elevator , rolling mill because to stop motor some backward force required

Description : Power-factor of industrial arc and induction furnace is:

Last Answer : Power-factor of industrial arc and induction furnace is: very low lagging

Description : For induction heating, which of the following is abnormally high?  A)Voltage B) Current C) Frequency D) Phase angle

Last Answer : For induction heating, which of the following is abnormally high?  A)Voltage B) Current C) Frequency D) Phase angle

Description : Electric welding equipment works best at  A) Low voltage and low current B) Low Voltage and high current C) High voltage and low current D) High voltage and high current

Last Answer : Electric welding equipment works best at Low Voltage and high current

Description : Dielectric heating is used for heating  A) Wood B)Aluminium C) Magnetic steel D) Copper

Last Answer : Dielectric heating is used for heating Wood

Description : The commonly used gases in tungsten arc welding are 1.Hydrogen and oxygen 2.Hydrogen and organ 3.Hydrogen and helium 4.Helium and argon

Last Answer : The commonly used gases in tungsten arc welding are Helium and argon

Description : Water break test is used to

Last Answer : Water break test is used to Verify Cleanliness of surfaces

Description : In an electroplating solution anions are

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Description : Gray iron is usually welded by   (a) Gas welding (b) TIG welding (c) MIG welding (d) Arc welding

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Last Answer : In an electric press, mica is used As an insulator

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Last Answer : Change in the frequency of supply does not affect the Electrical resistance heating

Description : Which of the following lamp light output is comparable with that of day light?  (a) Fluorescent lamp (b) Sodium vapour lamp (c) Mercury vapour lamp (d) Halogen lamp

Last Answer : Sodium  vapout  lamp

Description :  In HPSV lamps, traces of neon gas   (a) Helps in stabilizing the arc (b) Changes the colour of light (c) Prevents the vaporization of filament (d) Assists during starting to develop enough heat to vaporize sodium

Last Answer :  In HPSV lamps, traces of neon gas Assists during starting to develop enough heat to vaporize sodium

Description : The coefficient of adhesion is  (a) Zero in traction systems (b) Low in case of AC traction high in DC traction (c) High in AC traction low in case of DC traction (d) Same on AC and DC traction systems

Last Answer : The coefficient of adhesion is High in AC traction low in case of DC traction

Description : The average speed of a train is independent of   (a) Duration of steps (b) Acceleration and braking retardation (c) Distance between stops (d) Running time

Last Answer : The average speed of a train is independent of Duration of steps

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Last Answer : In which of the following welding methods, the molten metal is poured for joining the metals ?   (a) Gas welding (b) Thermit welding (c) TIG welding (d) Arc welding

Description : Power in the wind is proportional to

Last Answer : Power in the wind is proportional to (Wind velocity)3

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Last Answer : Arc resistance decrease with increase in arc current

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Last Answer : The motor used for electric traction is D.C. series motor

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Last Answer : For arc welding current range is usually 100 to 350 A

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Last Answer : Spot welding is used for Thin metal