This set of Mechanical Operations Multiple Choice Questions & Answers (MCQs) focuses on “Introduction to Conveyors”.
1. Which of the following is not of importance when a conveyor is designed?
a) Type of industry where the conveyor is being used
b) Type of material being carried by the conveyor
d) Length of travel of the conveyor
Explanation: Any industry looks at its expenditure and wishes to maximize profit. The conveyor used shall be cost effective, therefore cost is an important element. The length of travel determines the amount of material to be used for its construction. In an industry several types of materials can be carried and the conveyor must be designed accordingly.
2. What is a conveyor?
a) A conveyor is a static equipment that is used to store heavy and bulky materials
b) A conveyor is a moving equipment that is used to store heavy and bulky materials
c) A conveyor is a moving equipment that is used to carry heavy and bulky materials
d) A conveyor is a moving equipment that is used to carry light and compact materials only
Explanation: A conveyor usually carries heavy and bulky material from one point of an industry to another. A conveyor can carry both light and heavy materials. A conveyor is not used for storage of any sort of materials, may it be heavy and bulky, or light.
3. Which of the following is true about the speed of the conveyor belt?
a) Fixed conveyors need not be shut down during any speed change
b) Adjustable speed belts can be changed only manually
c) Fixed speed drives can undergo minor speed changes
d) Variations of speed is not possible with conveyors
Explanation: Conveyor belts can either have a fixed speed or an adjustable speed. A fixed conveyor always needs to be stopped before changing the speed. With an adjustable conveyor a variation of speed is possible, both manually and automatically, by changing speed while the conveyor is in operation.
4. Which of the following does an auxiliary equipment not do?
a) Act as a major equipment without which production is not possible
b) An auxiliary equipment makes production easier
c) An auxiliary equipment enhances production in some cases
d) An auxiliary equipment makes production dynamic
Explanation: Auxiliary equipment is an add-on equipment that makes production easier however, is not the main equipment used for production. They can enhance production and help in producing a variety of products for example, using Filling & Weighing station in a chocolate industry can help produce chocolate in different types of boxes.
5. What do you mean by ‘Conveyor control’?
a) Controlling the material flow, according to conveyor speed, to reduce power consumption
b) Controlling the conveyor speed, according to material flow, manually
c) Controlling the material flow, according to conveyor speed manually or using feedback drives
d) Controlling the conveyor speed, according to material flow to, reduce power consumption
Explanation: Conveyors can be run continuously or with varying speeds. Controlling the speed of the conveyors, according to the rate of material flow, is called conveyor control. It is done in order to reduce the power requirements and thereby, have a cost effective production. Variable speed drives are used when speed of the conveyor needs to be changed based on certain factors. Its speed can be changed manually or via feedback drives.
6. Which of the following is a correct description about the different types of conveyors?
a) Belt conveyor transports material in any direction
b) Slat conveyor requires high maintenance
c) Vibrating conveyor can convey materials of any friction factor
d) Screw conveyors usually handle lightweight materials
Explanation: One of the major advantages of a belt conveyor is that, it can carry bulk materials in any direction. Slat conveyors are highly reliable and require low maintenance. In a vibrating conveyor, the material being carried should have a high friction factor with respect to steel so that, the conveying action can be transmitted throughout the material. Screw conveyor usually carries bulky materials.
7. Which of the following is true about frame configuration?
a) Frame configuration refers to the size of the conveyor
b) Frame configuration refers to the size and shape of the conveyor
c) Frame configuration refers to the capacity of the conveyor
d) Frame configuration refers to the shape of the conveyor
Explanation: Frame configuration is an important, conveyor system specification. It refers to the shape of the frame of the conveyor, which could be straight, curved or z shaped. Capacity of the conveyor and size of the conveyor are characteristics that affect the ‘Throughput’.
8. Choose the correct unit of throughput.
a) Cubic feet per minute
b) Meter cube
c) Square feet per second
d) Meter square
Explanation: Throughput is a measure of the capacity of the conveyor to handle bulky materials. Throughput is always measured as the rate of volume flow, which implies that the units are of the form, volume per time. Therefore, from the given set of options, cubic feet per minute is the right option as it has the units of volume per time.
9. Which of the following is false about conveying systems?
a) An essential factor to consider before choosing the right conveyor system is the environment of operation
b) Conveyors cannot be used as feeders
c) The composition of the material being conveyed is very important
d) The surrounding temperature is one of the deciding factors
Explanation: A conveyor can be used as a feeder also. The feeding action is more time sensitive and precise than the conveying action. The tumbling effect of a conveyor also becomes very crucial during the feeding action.
10. Which of the following is false about conveyors?
a) Cleats can be used to prevent slipping
b) Backstopping brakes are used for straight belts
c) Anti-static belts are used when electric components are conveyed
d) Soft starters avoid overloading the motor
Explanation: Heavily loaded conveyors that are inclined, are prone to getting slipped backward and therefore, the backstopping brakes engage automatically with the de-energization of motors. Cleats are used to create separation between the products being conveyed and prevent slipping as well.
Sanfoundry Global Education & Learning Series – Mechanical Operations.
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