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Toothed belt is preferred over ribbed V belt.
A
Yes
B
No
C
They both imply to same thing
D
None of the listed
Correct Answer:
They both imply to same thing
Toothed belt and ribbed V belt is same thing.
Simplify : $${{{5 \over 3} \times {7 \over {51}}{\text{ of }}{{17} \over 5} - {1 \over 3}} \over {{2 \over 9} \times {5 \over 7}{\text{ of }}{{28} \over 5} - {2 \over 3}}}$$
A
$$\frac{1}{2}$$
B
4
C
2
D
$$\frac{1}{4}$$
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 m
3
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 (m
2
) of the material on the belt is 0.1B
2
, 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
The transfer function of a discrete time LTI system is given by
$$H\left( z \right) = {{2 - {3 \over 4}{z^{ - 1}}} \over {1 - {3 \over 4}{z^{ - 1}} + {1 \over 8}{z^{ - 2}}}}$$
Consider the following statements:
S
1
: The system is stable and causal for
$$ROC:\left| z \right| > {1 \over 2}$$
S
2
: The system is stable but not causal for
$$ROC:\left| z \right| S
3
: The system is neither stable nor causal for
$$ROC:{1 \over 4} Which one of the following statements is valid?
A
Both S<sub>1</sub> and S<sub>2</sub> are true
B
Both S<sub>2</sub> and S<sub>3</sub> true
C
Both S<sub>1</sub> and S<sub>3</sub> are true
D
S<sub>1</sub>, S<sub>2</sub> and S<sub>3</sub> are all true
A ribbed V belt is a negative drive.
A
Yes
B
No, it’s a positive drive
C
Zero drive
D
None of the listed
Ribbed V belt is not generally recommended as the output speed keeps fluctuating.
A
True
B
No, it is generally recommended
C
No variation in output speeds
D
None of the listed
Vibratory feeder or toothed belt feeder as used to measure the quantity of the abrasive particles before mixing.
A
True
B
False