The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism because

A

whole of the mechanism in the Ackerman steering gear is on the back of the front wheels

B

the Ackerman steering gear consists of turning pairs

C

the Ackerman steering gear is most economical

D

both a and b

A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. A gear train consist of spur gear as shown. Gear A receives 4kW of power at 750rpm through its shaft and rotates in CW direction. Calculate the torque on the gear C if number of teeth on gear A, B and C are 40, 70 and 30.

A

66N-m

B

68N-m

C

53N-m

D

45N-m

The Ackermann steering mechanism is preferred to the Davis type in automobiles because

A

The former is mathematically accurate

B

The former is having turning pair

C

The former is most economical

D

The former is most rigid

The condition for correct steering of a Davis steering gear is (where $$\alpha = $$ Angle of inclination of the links to the vertical)

A

$$\sin \alpha = \frac{{\text{b}}}{{\text{c}}}$$

B

$$\cos \alpha = \frac{{\text{c}}}{{\text{b}}}$$

C

$$\tan \alpha = \frac{{\text{c}}}{{2{\text{b}}}}$$

D

$$\cot \alpha = \frac{{\text{c}}}{{2{\text{b}}}}$$

The Davis steering gear fulfils the condition of correct steering at

A

two positions

B

three positions

C

all positions

D

one positions

What is the value of $${b \over l}$$ in Ackerman steering gear equation?

A

0.5 - 0.6

B

0.4 - 0.5

C

0.1 - 0.2

D

0.1 - 0.3

A planetary gear train is shown in the figure. Number of teeth on the sun gear A, planet gear B and fixed ring gear D are given by 30, 70 and 140 respectively. Module is taken as 5mm. A pair of spur gears consist of 25 teeth pinion meshing with a 115 teeth gear. The module is 5mm. Calculate the gear ratio.

A

5

B

4.6

C

5.2

D

4

Following is the data for transmission system of a Gear box reduction ratios.
1^st gear - 4.3 : 1
2^nd gear - 3.00 : 1
3^rd gear - 2.71 : 1
4^th gear - 1 : 1
Final drive reduction is 5.0 : 1
The overall reduction when the vehicle is driven in 2^nd gear is

A

3.00 : 1

B

13.55 : 1

C

5 : 1

D

15 : 1

Which of the following are associate with the Ackerman steering mechanism used in automobiles? 1) Has both sliding and turning pairs 2) Less friction and hence long life 3) Mechanically correct in all positions 4) Mathematically not accurate except in three positions 5) Has only turning pairs 6) Controls movement of two front wheels

A

2, 4, 5 and 6

B

1, 2, 3 and 6

C

2, 3, 5 and 6

D

1, 2, 3 and 5

Which of the following are associated with Ackerman steering mechanism used in automobiles? 1. Has both sliding and turning pairs 2. Less friction and hence long life 3. Mechanically correct in all positions 4. Mathematically not accurate except in three positions. 5. Has only turning pairs 6. Controls movement of two front wheels

A

2, 4, 5 and 6

B

1, 2, 3 and 6

C

2, 3, 5 and 6

D

1, 2, 3 and 5

The Ackerman steering gear mechanism is preferred to the Davis steering gear mechanism, because

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