Tractive effort is required to?

by

1 Answer

Answer :

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

by

Related questions

For given maximum axle load tractive efforts of AC. locomotive will be?

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

In case of locomotives the tractive power is provided by?

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

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

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.

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

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.

What is beyond your ability by a smidge?

Description : What is beyond your ability by a smidge?

Last Answer : Writing a novel.

At what point does a strange habit become a fetish?

Description : At what point does a strange habit become a fetish?

Last Answer : I think it would be when he starts hitting the ham because of it.

Tractive effort acts

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

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

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

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 : 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

Last Answer : Answer: Option C

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

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.

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 : 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

Last Answer : ANS: A

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 : 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

Last Answer : Answer: Option D

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 : 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

Last Answer : Answer: Option C

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 : 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

Last Answer : Answer: Option B

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 : 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

Last Answer : c) 0.76

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

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

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

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

Last Answer : (b) Portative

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

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

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

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

Which model is used to compute the effort required to integrate reusable components or program code that is automatically generated by design or program translation tools? a) An application-composition model b) A post-architecture model c) A reuse model d) An early design model

Description : Which model is used to compute the effort required to  integrate reusable components or program code that is  automatically generated by design or program translation  tools? a) An application-composition model b) A post-architecture model c) A reuse model d) An early design model

Last Answer : c) A reuse model

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

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

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 maintainCannot be hacked easily

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

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

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

………………… approach reduces time and effort required for design and lesser risk in database management. A) Single global database B) Top-down approach C) Multiple databases D) None of the above

Description : ………………… approach reduces time and effort required for design and lesser risk in database management. A) Single global database B) Top-down approach C) Multiple databases D) None of the above

Last Answer : C) Multiple databases

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 complete the project using the effort formula of basic COCOMO given below: E = a(KLOC)b Assume that the values of a and b are 2.5 and 1.0 respectively. (A) 25 person months (B) 75 person months (C) 62.5 person months (D) 72.5 person months

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 

lumen / watt is the unit of:

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

Last Answer : luminous efficiency

Which braking system on the locomotives is the costliest among the following?

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

In practice generative breaking is used when

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

Power-factor of industrial arc and induction furnace is:

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

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

For induction heating, which of the following is abnormally high?

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

Electric welding equipment works best at

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 

Dielectric heating is used for heating

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 

The commonly used gases in tungsten arc welding are

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

Water break test is used to

Description : Water break test is used to

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

In an electroplating solution anions are

Description : In an electroplating solution anions are

Last Answer : In an electroplating solution anions are Negatively charged

Gray iron is usually welded by

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

Last Answer : Gray iron is usually welded by Gas welding

In an electric press, mica is used

Description : In an electric press, mica is used   (a) As an insulator (b) As a device for power factor improvement (c) For dielectric heating (d) For induction heating 

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

The flicker effect of fluorescent lamps is more pronounced at

Description :  The flicker effect of fluorescent lamps is more pronounced at   (a) Lower frequencies (b) Higher frequencies (c) Lower voltage (d) Higher voltages  

Last Answer : Lower frequencies

Change in the frequency of supply does not affect the

Description : Change in the frequency of supply does not affect the   (a) Dielectric heating (b) Electrical resistance heating (c) Induction heating (d) Microwave heating 

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

Which of the following lamp light output is comparable with that of day light?

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

In HPSV lamps, traces of neon gas

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

The coefficient of adhesion is

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 

The average speed of a train is independent of

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

In which of the following welding methods, the molten metal is poured for joining the metals ?

Description : 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 

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 

Power in the wind is proportional to

Description : Power in the wind is proportional to

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

Arc resistance

Description : Arc resistance  (1) increases with increase in arc current (2) decrease with increase in arc current (3) is independent of arc current (4) is independent of arc length

Last Answer : Arc resistance decrease with increase in arc current 

The motor used for electric traction is

Description : The motor used for electric traction is  (1) D.C. shunt motor (3) D.C. series motor  (2) D.C. compound motor (4) Synchronous motor

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

For arc welding current range is usually

Description : For arc welding current range is usually  (1) 10 to 15 A (2) 30 to 40 A (3) 50 to 100 A (4) 100 to 350 A

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

Spot welding is used for

Description : Spot welding is used for (1) Thin metal (3) Castings only (2) Rough and irregular surface (4) Thick sections

Last Answer : Spot welding is used for Thin metal