# Traction & Traction Theory MCQ Questions & Answers

Traction & Traction Theory MCQs : This section focuses on the "Traction & Traction Theory". These Multiple Choice Questions (MCQs) should be practiced to improve the Traction & Traction Theory skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.

Question 1

A 2-wheel drive 35 HP tractor has 1.5 m rear wheel diameter. The engine runs at 1200 rev/min. the total reduction of speed is 30:1. Find the travelling speed of tractor in km/h.

A. 12.09 kmh-1
B. 11.31 kmh-1
C. 14.90 kmh-1
D. 9.99 kmh-1

Question 2

A traction wheel having 600 mm diameter was tested in a soil bin and following data was obtained, angular speed=10rpm, input torque to wheel angle=60 Nm, drawbar pull=150 N, normal load on wheel axle=500 N, wheel forward speed=0.25 ms-1. What will be the slippage?

A. 19.47%
B. 20.18%
C. 20.43%
D. 19.98%

Question 3

A traction wheel having 600 mm diameter was tested in a soil bin and following data was obtained, angular speed=10rpm, input torque to wheel angle=60 Nm, drawbar pull=150 N, normal load on wheel axle=500 N, wheel forward speed=0.25 ms-1. What will be the tractive efficiency?

A. 69.96%
B. 59.67%
C. 24.48%
D. 51.49%

Question 4

A two-wheel drive tractor is pulling a load of 12 KN horizontally on levelled surface at forward speed of 5km/hr. The rolling radius of traction wheel and wheel slip are 0.65m and 20% respectively. If rear axle torque is 9KNm the tractive efficiency is ______

A. 69.31%
B. 23.90%
C. 51.49%
D. 10.24%

Question 5

Energy required to overcome the rolling resistance which is equal to the work done in deforming the soil is known as _________

A. Wheel slip
B. Rim pull
C. Tractive efficiency
D. Rolling resistance

Question 6

How is traction and the direction of travel related?

A. Traction is the slip in the direction of travel
B. Traction is the force in the direction of travel
C. Traction is equal to the direction of travel
D. Traction is inversely proportional to the direction of travel

Question 7

How much traction would be generated by the force of 1000N applied by tyre on soil and soil capacity is 2000 N?

A. 3000 N
B. 20,000 N
C. 2 N
D. 1000 N

Question 8

Overall efficiency of steam locomotive system is close to ________

A. 5-10%
B. 25-30%
C. 55-60%
D. 75-80%

Question 9

The line of pull on an implement is 20° above the horizontal and in a vertical plane which is at an angle 10° with the direction of travel. What drawbar power would be required at 5km/h

A. 13.8 KW
B. 11.5 KW
C. 12.5 KW
D. 9.87 KW

Question 10

What are the chains known as in track frame assembly of the Crawler Tractor?

A. Track
B. Break
C. Pull
D. Idler

Question 11

What causes reduction in speed during the movement of wheels?

A. Slip
B. Acceleration
C. Pump
D. Hydraulics

Question 12

What is co-efficient of traction?

A. C.O.T = (Total force output of the traction device in the direction of travel) + (Dynamic weight on traction device)
B. C.O.T = (Total force output of the traction device in the direction of travel) - (Dynamic weight on traction device)
C. C.O.T = (Total force output of the traction device in the direction of travel) * (Dynamic weight on traction device)
D. C.O.T = $$\frac{Total \, force \, output \, of \, the \, traction \, device \, in \, the \, direction \, of \, travel}{(Dynamic \, weight \, on \, traction \, device)}$$

Question 13

A. Î¼ = $$\sqrt{\frac{g*A*r}{Zcg}}$$
B. Î¼ = $$\sqrt{\frac{Zcg}{g*A*r}}$$
C. Î¼ = $$\sqrt{\frac{g-A-r}{Zcg}}$$
D. Î¼ = $$\sqrt{\frac{g+A+r}{Zcg}}$$

Question 14

What is term used to designate the tractive force between the rubber tyres of the driving wheel and the surface on which they travel?

A. Rolling resistance
B. Crawler
C. Rim pull
D. Wheel slip

Question 15

What is tractive efficiency?

A. Input power - Output power
B. Input power + Output power
C. $$\frac{Output \, Power}{Input \, Power}$$
D. Output power * Input Power

Question 16

What is wheel slip?

A. (N1 + N2) * N1
B. $$\frac{N1-N0}{N1}$$*100
C. (N1 + N2) * 100
D. $$\frac{N1}{N1-N0}$$*100

Question 17

What is wheel's force?

A. Force = wheel torque * wheel radius
B. Force = wheel torque + wheel radius
C. Force = wheel torque/wheel radius
D. Force = wheel torque - wheel radius

Question 18

Which motor is used in tramways?

A. AC single phase capacitor start motor
B. AC three phase motor
C. DC series motor
D. DC shunt motor

Question 19

Which tyres are used for common tractors?

A. Metal
C. Welded
D. Pneumatic