# Material Transport System Questions and Answers – Conveyor Analysis

This set of Flexible Manufacturing System Multiple Choice Questions & Answers (MCQs) focuses on “Material Transport System – Conveyor Analysis”.

1. How is the time required (Td) to move materials from one station to another station in a single direction conveyors calculated?
a) Td = Ld – Vc
b) Td = Ld + Vc
c) Td = Ld * Vc
d) Td = Ld / Vc

Explanation: The time required (Td) to move materials from one station to another station in a single direction conveyor is calculated as : Td = Ld / Vc where, Ld = length of the conveyor, Vc = velocity of the conveyor.

a) Mass
b) Velocity
c) Weight
d) Flow Rate

3. Which of the following is limited by the reciprocal of the time required to load the materials?
a) Null Rate
b) Idle Rate

Explanation: The analyzing parameter which is limited by the reciprocal of the time required to load the materials is known as loading rate. It is very important in analyzing the performance of conveyor systems with the given operating conditions.

4. Time required to unload the conveyor must be greater than the reciprocal of the material flow rate.
a) False
b) True

Explanation: The Time required to unload the conveyor must be less than or equal to the reciprocal of the material flow rate. It should not be greater than the reciprocal of the material flow rate according to the conveyor rule.

5. A roller conveyor has a velocity of 20 m / min. The spacing between the rollers is 15 m. Each tote pan in it can hold upto 10 parts. What will be the flow rate of this system?
a) 0.133
b) 10.13
c) 1.33
d) 13.33

Explanation: Given,
Conveyor Velocity = 20 m / min
Spacing between the rollers = 15 m
Total number of parts = 10
To Find: Flow rate of the system
Solution:
Flow rate = ((Total No. of parts) * (conveyor velocity)) / (spacing between the rollers)
= (20 * 10) / 15
= 13.33 parts / min.

6. How is the total number of carriers (nc) in the continuous loop conveyor system calculated?
a) nc = L * Sc
b) nc = L + Sc
c) nc = L – Sc
d) nc = L / Sc

Explanation: The total number of carriers in the continuous loop conveyor system is calculated as: nc = L / Sc where, L = Total length of the conveyor loop, Sc = Centre – to – centre distance between carriers.

7. How is the total number of parts at any time in a continuous loop conveyor calculated?
a) Total Parts = (np – nc * Ld) / L
b) Total Parts = (np + nc * Ld) / L
c) Total Parts = (np / nc * Ld) / L
d) Total Parts = (np * nc * Ld) / L

Explanation: The total number of parts at any time in a continuous loop conveyor is calculated as: Total number of Parts in the system = (np * nc * Ld) / L . where, np = no. of parts in a tote pan, nc = number of carriers, Ld = length of the delivery loop, L = Total length of the conveyor loop.

8. Which rule states that the operating speed of the conveyor must be within a certain range?
a) Range Rule
b) Speed Rule
c) Carrier Rule
d) Conveyor Rule

Explanation: Speed Rule states that the operating speed of the conveyor must be within a certain range. While designing the recirculating type of conveyors, this is one of the basic principles that must be satisfied.

9. Which constraint in designing recirculating conveyors defines that the flow rate capacity must be at least equal to the flow rate requirement?
a) Acceleration Constraint
b) Capacity Constraint
c) Force Constraint
d) Speed Constraint

Explanation: Capacity Constraint states that the flow rate capacity must be at least equal to the flow rate requirement. This must be satisfied in order to accommodate the reserve stocks and the elapsed time between the loading and unloading stations.

10. Which principle states that the parts should be uniformly distributed throughout the length of the conveyor?
a) Moods Principle
b) Uniformity Principle
c) Archimedes Principle
d) Conveyor Principle

Explanation: Uniformity Principle states that the parts should be uniformly distributed throughout the length of the conveyor. This is done in order to eliminate long waiting times between the loading and unloading stations.

11. How is the flow rate of materials in conveyor systems measured?
a) Kg / s
b) Parts / min
c) Parts / N
d) N / s

Explanation: The flow rate of materials in the conveyor systems is typically measured by parts / min. It means how many parts are travelled from loading station to the unloading station in a minute. It usually varies depending on the operating conditions.

12. The conveyors carry empty in the forward loop of continuous loop conveyors.
a) False
b) True

Explanation: The conveyors usually carry parts that are to be delivered to the unloading station during the forward loop in the continuous loop conveyors. It usually travels empty in the return loop from unloading station to the loading station.

Sanfoundry Global Education & Learning Series – Flexible Manufacturing System.

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