Vibratory feeder or toothed belt feeder as used to measure the quantity of the abrasive particles before mixing.

The efficiency of flat belt drive is 35%. If all the parameters are same and flat belt is replaced by V belt, than the efficiency of V belt will be?

A

<35%

B

>35%

C

=35%

D

Cant be determined

When the belt is transmitting maximum power, the belt speed should be
(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

A

$$\sqrt {\frac{{{\text{P}}\max }}{{2{\text{m}}}}} $$

B

$$\sqrt {\frac{{{\text{P}}\max }}{{3{\text{m}}}}} $$

C

$$\sqrt {\frac{{{\text{P}}\max }}{{\text{m}}}} $$

D

$$\sqrt {\frac{{{\text{3m}}}}{{{\text{P}}\max }}} $$

A bucket wheel excavator with 20 buckets of capacity 0.5 m³ each, rotates at 5 rev/min. The bucket fill factor is 80%. The excavator loads on to 1200 mm wide belt conveyor. The cross-section area (m²) of the material on the belt is 0.1B², where B is the belt width in m. The minimum speed of the belt in m/s to avoid spillage of material is

A

7.23

B

5.79

C

4.63

D

3.7

The ratio of belt tensions $$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}}$$ considering centrifugal force in flat belt is given by where,
m = mass of belt per meter (kg/m)
v = belt velocity (m/s)
f = coefficient of friction
$$\alpha $$ = angle of wrap (radians)

A

$$\frac{{{{\text{p}}_1} - {\text{m}}{{\text{v}}^2}}}{{{{\text{p}}_2} - {\text{m}}{{\text{v}}^2}}} = {{\text{e}}^{{\text{f}}\alpha }}$$

B

$$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}} = {{\text{e}}^{{\text{f}}\alpha }}$$

C

$$\frac{{{{\text{p}}_1}}}{{{{\text{p}}_2}}} = {{\text{e}}^{ - {\text{f}}\alpha }}$$

D

$$\frac{{{{\text{p}}_1} - {\text{m}}{{\text{v}}^2}}}{{{{\text{p}}_2} - {\text{m}}{{\text{v}}^2}}} = {{\text{e}}^{ - {\text{f}}\alpha }}$$

Which of the following belts are associated with seismic activity?
1. Circum-Pacific Belt
2. Circum-Atlantic Belt
3. Mid-Continental Belt
4. Mid-Atlantic Belt

A

1, 2 and 4

B

1, 3 and 4

C

1, 2 and 3

D

2, 3 and 4

Toothed belt is preferred over ribbed V belt.

A

Yes

B

No

C

They both imply to same thing

D

None of the listed

What is the grain size of abrasive particles, which are often used for Abrasive water jet machining?

A

0.01 – 0.50 µm

B

10 – 150 µm

C

200 – 500 µm

D

500 – 1000 µm

State whether the following statement is true or false about Magnetic abrasive finishing. “Vibratory motion that is axial, is introduced in the magnetic field by the oscillation of magnetic poles.”

A

True

B

False

A heavy block of mass m is slowly placed on a conveyer belt moving with speed v. If coefficient of friction between block and the belt is μ, the block will slide on the belt through distance

A

v/μg

B

v2/√μg

C

(v/μg)2

D

v2/2μg

A counter shaft of engineering workshop is being driven by electric motor with the help of canvas belt and pulley arrangement such that the speed of belt is 600 m/min and it transmits 50 KW. What will be the difference between tensions on either side of the belt?

A

10000

B

100

C

5000

D

50