When two pulleys of different diameters are connected by means of an open belt drive, then the angle of contact taken into consideration should be of the

When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the ________ pulley must be taken into consideration.

A

Smaller

B

Larger

C

Either A or B

D

None of these

When two pulleys of different diameters are connected by means of an open belt, the angle of contact at the _________pulley must be taken into consideration.

A

smaller

B

larger

C

medium

D

none of the mentioned

Consider the following statements regarding V-belt drive : 1. The groove angle of the sleeve is less than the belt section angle 2. The efficiency of a V-belt drive is higher than that of a flat belt drive 3. The groove angle is so made that the belt gets wedged in the groove Which of the above statements are correct ?

A

1, 2 and 3

B

1 and 2 only

C

1 and 3 only

D

2 and 3 only

Two pulleys are connected by a belt. The sum of the diameters of the pulleys is 92.6 cm and while one makes 50 rev/min the other make 200 rev/min. What will be the diameter of the pulleys?

A

18.53 cm, 74.07 cm

B

19.65 cm, 64.89 cm

C

20.01 cm, 78.09 cm

D

17.69 cm, 69.90 cm

Two pulleys of diameters d1 and d2 and at distance x apart are connected by means of an open belt drive. The length of the belt is

A

π /2 (d1 + d2) 2x + (d1 + d2)2/4x

B

π /2 (d1 – d2) 2x + (d1 – d2)2/4x

C

π /2 (d1 + d2) 2x + (d1 – d2)2/4x

D

π /2 (d1 – d2) 2x + (d1 + d2)2/4x

Two pulleys are connected by a belt. The sum of the diameter of two pulleys is 90 cm and while the one makes 50 rpm, the other makes 20 revolutions. What will be the diameter of the pulleys?

A

19.7cm, 70.3 cm

B

23.4 cm, 68.7 cm

C

25.7 cm, 64.3 cm

D

21.1 cm,63.2 cm

When two pulleys are connected by means of a cross belt drive, then both the pulleys will rotate in _________ directions.

A

Same

B

Opposite

C

Perpendicular

D

None of these

Two pulleys of radii r₁ and r₂ and at distance x apart are connected by means of an open belt drive. The length of the belt is

A

$$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

B

$$\pi \left( {{{\text{r}}_1} + {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

C

$$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} - {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

D

$$\pi \left( {{{\text{r}}_1} - {{\text{r}}_2}} \right) + \frac{{{{\left( {{{\text{r}}_1} + {{\text{r}}_2}} \right)}^2}}}{{\text{x}}} + 2{\text{x}}$$

In a flat belt drive, if the slip between the driver and belt is 1%, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be

A

0.96

B

0.97

C

0.98

D

0.99

‘Grand Slam’ refers to winning certain major tennis tournaments in a single calendar year. The name of the tournaments are A. Australian Open, French Open and US Open B. Australian Open, French Open, Wimbledon and US Open. C. French Open, US Open and Wimbledon D. French Open, US Open, Wimbledon and Olympic

A

D

B

C

B

D

A

When two pulleys of different diameters are connected by means of an open belt drive, then the angle of contact taken into consideration should be of the

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