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Description :

Phylum Echinodermata

Answer :

ARMORED SAND STAR (Astropecten armatus) Habitat: Sandy bottoms to 60m from Southern California to Ecuador. Size: 15 cm (6 in) Position in food web: Carnivorous: Feeds on mainly on snails ... than others, about 1 m in 15 minutes Relatives: sea stars, sand dollars, and sea urchins

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Description :

TWO-SPOT OCTOPUS (Octopus bimaculatus or bimaculoides)

Answer :

TWO-SPOT OCTOPUS (Octopus bimaculatus or bimaculoides) Habitat: Rocky intertidal zone, rocky reefs and among kelp from Point Conception to Mexico. Size: Mantle length 20 cm (8 in), body length ... than two years, and dying soon after reproducing Relatives: clams, sea hares, squid, and nudibranchs

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Description :

WAVY TOP SNAIL(Megastraea undosa)

Answer :

WAVY TOP SNAIL(Megastraea undosa) Habitat: Rocky intertidal zone to 30m from Point Conception to Baja California. Size: 11 cm (4.3 in) Position in food web: Herbivorous: Feeds on kelp and ... off their shell opening with a thick operculum (trap door). Relatives: sea hares, octopuses, and clams

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Description :

ROCK SCALLOP (Crassedoma giganteum)

Answer :

ROCK SCALLOP (Crassedoma giganteum) Habitat: Rocky intertidal zone and rocky reefs from British Columbia to Baja California Size: 25 cm (10 in) Position in food web: Filter feeder: ... numerous blue, light-sensing eye spots that can detect motion Relatives: clams, octopuses, and nudibranchs

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Description :

PURPLE OLIVE SNAIL (Olivella biplicata)

Answer :

PURPLE OLIVE SNAIL (Olivella biplicata) Habitat: Sandy bottom to 50 m deep. Range from British Columbia to Baja California. Size: 3 cm (1.5 in) Position in food web: Scavenger: Feeds on ... in the sand during the day, leaving a trail behind Relatives: sea hares, octopuses, and clams

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Description :

NUDIBRANCHS (Various species) 

Answer :

NUDIBRANCHS (Various species) Habitat: Various habitats worldwide Size: From 2 cm (.75 in) to 60 cm (2 ft) Position in food web: Carnivorous: Feed on sponges, hydroids, bryozoans, ... Nudibranchs generally lay their eggs in a gelatinous ring or spiral Relatives: sea hares, octopuses, and clams

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Description :

NORRIS’ TOP SNAIL (Norrisia norrisi)

Answer :

NORRIS' TOP SNAIL (Norrisia norrisi) Habitat: Rocky intertidal zone to 30 m from Point Conception to Baja California. Size: 5 cm (2 in) Position in food web: Herbivorous: Feeds on kelp and other ... rocks to smash the shell open in order to eat them. Relatives: sea hares, octopuses, and clams

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Description :

GIANT KEYHOLE LIMPET (Megathura crenulata)

Answer :

Habitat: Rocky intertidal zone and rocky reefs of central California to Baja California. Size: 13 cm (5 in) shell length Position in food web: Omnivorous: feeds on algae and tunicates. Prey ... predators from being able to grip on to the limpet. Relatives: clams, octopuses, and nudibranchs

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Description :

LIMPETS (Various species)

Answer :

Habitat: Rocky intertidal zone, worldwide Size: 2 cm (1 in) to 20 cm (8 in) Position in food web: Herbivorous: Most feed on algae. Prey for fish, sea stars, and birds. Interesting ... clamped down on rocks it is next to impossible to pry them off Relatives: clams, octopuses, and nudibranchs

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Description :

CHESTNUT COWRIE (Cypraea spadicea)

Answer :

CHESTNUT COWRIE (Cypraea spadicea) Habitat: Rocky intertidal zone from central California to Baja California. Size: 4 cm (3 in) long Position in food web: Omnivorous: Feeds on algae ... found in California waters, mostly found in tropical waters Relatives: clams, octopuses, and nudibranchs

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Description :

CHITON (Various species)

Answer :

Habitat: Rocky intertidal zone from the Aleutian Islands to San Diego. Size: 1 cm (1/2 inch) to 33 cm (13 in) Position in food web: Omnivorous: Feeds on algae, diatoms and sometimes ... from a rock, chitons often roll into a ball like a pill bug Relatives: clams, octopuses, and nudibranchs

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Description :

Phylum Mollusca

Answer :

CALIFORNIA MUSSEL (Mytilus californianus) Habitat: Rocky intertidal zone from Alaska to Baja California. Size: 25 cm (10 in) long, 10 cm (4 in) high Position in food web: Filter ... causing tremors, seizures, and disorientation in marine mammals. Relatives: scallops, squid, and sea hares

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Description :

TUBE-DWELLING ANEMONE (Pachycerianthus fimbriatus)

Answer :

TUBE-DWELLING ANEMONE (Pachycerianthus fimbriatus) Habitat: Sandy bottom areas from Alaska to Baja California Size: 30 cm (12 in) Position in food web: Carnivorous suspension feeder: Feeds on ... visible light giving them a fluorescent orange color. Relatives: Sea jellies, corals, and sea fans

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Description :

SAND-ROSE ANEMONE (Urticina columbiana)

Answer :

SAND-ROSE ANEMONE (Urticina columbiana) Habitat: Sandy bottom areas from British Columbia to Baja California. Size: 35 cm (14 in) in diameter Position in food web: Carnivorous suspension ... weak to humans and feels sticky rather than painful. Relatives: sea jellies, corals, and gorgonians

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Description :

Phylum Cnidaria

Answer :

GORGONIANS (local) (Various species) Habitat: Attached to rocks in rocky reefs below low-tide line. Found from Southern California to Baja California. Size: Height from 25 cm (10 in) to 90 ... or feeding. Relatives: Sea anemones, corals, and other jellies such as the Portuguese man-of-war

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Description :

Phylum Porifera

Answer :

SPONGES (general) (Various species) Habitat: various-from the tropical reefs to the arctic sea from the deep sea to the intertidal zone Size: Wide variety of shapes, colors and sizes-- ... for absorption. Scientists have yet to create a synthetic sponge as absorbent as a natural one.

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Description :

Mammals- are animals that have warm-blood, fur or hair, and have live babies. o All mammals have some type body hair or fur. Some marine mammals are nearly hairless, like whales and dolphins. o The longest mammal gestation is a little longer than 20 months, and belongs to the Asian Elephant. o Marsupial ... , and 4 species of echidna. All live in Australia and New Guinea. These animals are very primitive mammals, sharing some physical features with birds and reptiles. 

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Description :

Explain constructional features, and working of progressive die. Also state the functions of any four parts of progressive die. 

Answer :

Constructional features and Working of Progressive Die:  A progressive die consists of the following parts. 1. Stop 2. Sheet metal 3. Pilot 4. Blanking punch 5. Ram 6. Piercing ... 7. Piercing punch: The function of piercing punch is to produce punched holes into the sheet metal. 

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Description :

Differentiate between Lapping and Buffing process. 

Answer :

difference between Lappin and Buffing process : Sr. No.  Lapping Buffing 1 Lapping is a finishing process in which tool used is called as lap.   Buffing ... , sporting items, tools, store fixtures, commercial and residential hardware and household utensils and appliances.  

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Description :

Describe procedural steps for developing CNC part programme. 

Answer :

Procedure for developing part program There are two methods of part programming: manual part program and computer assisted part programming. Manual part programming: 1. To prepare a part program using the ... . 5. The NC system machines (makes) the part according to the instructions on tape. 

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Description :

Explain absolute and incremental co-ordinate systems, with suitable example. 

Answer :

1. Absolute Co- ordinate system: In Cartesian co ordinate geometry system using absolute measurement. Each point is always specified using same zero of given co ordinate system as shown in fig. It is ... to the system as a distance increment, measured from preceding point. Example:    

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Description :

With neat sketch explain the working principle of CNC machines. 

Answer :

Working Principle of CNC machine:- A CNC machine also has a tape reader or any other input media for entry of the part program. CNC uses the part program in a different manner though there is ... to the reference. These two signals are compared and necessary action is controlled.   Or  

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Description :

Differentiate between conventional machines and CNC machine.

Answer :

Answer: 

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Description :

State the various advantages and limitations of CNC machine. 

Answer :

Advantages of CNC Machines:-  [1] Greater machine utilization. [2] Complex machining operations can be easily done. [3] It gives high degree of accuracy. [4] It requires less inspection. [5] ... tooling cost. 6) Temperature, humidity & dust must be affect machining. 7) Initial cost is high. 

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Description :

Explain how tumbling process is used to clean the surfaces.

Answer :

Tumbling process: Tumbling process is used for removing rust and scale from metal parts. In this dry abrasive (deburring compounds) are effective for removing rust and scale from small parts of ... from the product. Parts configuration and size are the primary limitations of the process 

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Description :

Explain the working principle of galvanizing process. Give its applications also. 

Answer :

Galvanization or galvanisation or galvanizing is the process of applying a protective zinc coating to steel or iron, to prevent rusting. The most common method is hot-dip galvanizing, in which parts are ... 5. All sort of containers 6. telegraph wire 7. fencing materials 8.Transformer parts

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Description :

State advantages and limitations of honing process. 

Answer :

Advantages: 1. Less complex or low cost fixtures. 2. It is highly accurate. 3. It can be used for both long and short bores. 4. It maintains original bore centerline. 5. Any ... rotated or supported. If the workpiece is thin, even hand pressure may cause a slightly oval hole. 

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Description :

Explain the working principle of resistance welding with neat sketch. 

Answer :

Resistance Welding Process: 1.Resistance Spot welding:  Spot welding is employed to join overlapping strips, sheets or plates of metal at small areas. The pieces are assembled between two ... welding small parts. Butt Welding provides joining with no loss of the welded materials.  

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Description :

Draw neat sketch showing various parts of die set. 

Answer :

Answer: 1. Stop 2.Sheet metal 3.Pilot 4.Blanking punch 5.Ram 6.Piercing punch 7.Stripper 8.die Fig. Progressive Die OR

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Description :

With neat sketch explain the features of oxidizing flame and carburizing flame.

Answer :

Oxidizing Flame: An oxidizing flame is one in which there is an excess of oxygen. The flame has two zones- the smaller inner cone which has purplish tinge, the outer cone or envelop.   Carburizing ... defined inner cone 2) An intermediate cone of whitish colour. 3) Bluish outer cone   

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Description :

Explain the working principle of MIG welding with neat sketch.

Answer :

MIG Welding: Gas-metal-arc welding is a gas shielded metal arc welding process which uses the high heat of an electric arc between a continuously fed, consumable electrode wire and the material to be ... will not combine with metal. Carbon dioxide is most commonly used as it inexpensive.

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Description :

Give detail classification of welding. State important factors upon which selection of welding process depends. 

Answer :

Answer: Classification of Welding 1. Arc welding a. Carbon Arc Welding; b. Shielded Metal Arc Welding (SMAW) c. Submerged Arc Welding (SAW) d. Metal Inert Gas Welding (MIG, ... workers 14. Cost of materials 15. Code or specification requirements 16. Mechanical properties desired in joints 

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Description :

Draw neat sketch of compound die, showing various parts of it.

Answer :

Answer:

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Description :

State the functions of the following die accessories: pilots, stops, strippers, pressure pad. 

Answer :

Answer: Functions of die accessories. 1. Pilots: The pilot positions, the stock strip accurately and bring it into proper position for blanking and piercing operations. They act as guides during the ... 4. Pressure pad: It is used for drawing operation for maintaining flat surface of the cup. 

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Description :

Explain blanking and piercing operation performed by press. 

Answer :

Blanking: The blanking is the operation of cutting of flat sheet to the desired shape. The piece detached from strip is known a blank. The metal punched out is the required product and the plate with the ... hole and clearance is provided on the die. Fig. shows punch and die set for piercing.  

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Description :

Draw the neat sketch of fly press. Give the functions of important parts of it. 

Answer :

Answer: OR Functions of important parts of Fly Press. 1. Ram : This is main operating part of the press which works directly during processing of a workpiece. Ram ... : A die is a specialized tool used in manufacturing industries to cut or shape material mostly using a press 

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Description :

Explain press forging with neat sketch. 

Answer :

Press Forging: In press forging, impression dies are used in which partd are made by plastically deforming a metal blank into die avities by slow squeezing action. The forging pressure builds up from the ... they are generally employed for non-ferrous alloys weighting from upto about 135 N. 

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Description :

Give detail classification of forging processes. 

Answer :

Classification of forging processes :  1.Open die forging: a) Hand forging b) Power forging:  i. Hammer forging  ii. Press forging 2.Close die forging: a) Drop forging b) Press forging c) Machine forging

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Description :

Differentiate between open die forging and close die forging.

Answer :

Difference between open die and close die forging:

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Description :

Explain forging process used to manufacture the spanners. 

Answer :

Answer: Forging process used for production of spanner: 1) Fullering -The heated stock is elongated by reducing its cross section in first die.  2) Edging- The metal is redistributed, ... Trimming: Flash is removed   (6) Heat treatment and machining is done as per requirement.   

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Description :

State various advantages and limitations of forging processes. 

Answer :

Answer: Advantages of forging processes  1) Complex shaped parts can be forged 2) Mass production with greater accuracy is achieved. 3) It is very easy to maintain close tolerances. 4) ... cannot be produced by forging. 8) Rapid oxidation of metal surface at high temperature wears the dies 

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Description :

Define forgeability. Name any two materials that are used in forging. 

Answer :

Forgeability: Forgeability can be defined as the tolerance of a metal or alloy for deformation without failure. OR  Forgeability is defined as the ability of a metal to change size and shape when heated to ... 10) Tantalum alloys 11) Molybdenum alloys 12) Tungsten alloys 13) Beryllium.

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Description :

Give the classifications of CNC machines according to number of axes. 

Answer :

Answer: Classification of CNC machines according to number of axes 1. 2 axes CNC Machine 2. 3 axes CNC Machine 3. 4 axes CNC Machine 4. 5axes CNC Machine

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Description :

List any four G codes, give their meaning.  

Answer :

Answer:

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Description :

List various surface cleaning processes. 

Answer :

Answer: Surface cleaning processes I. Chemical Cleaning a. Solution b. Saponification c. Emulsification d. Dispersion e. Aggregation Depending on cleaning fluids used, types of chemical ... . Power brushing e. Machine polishing & buffing III. Ultrasonic cleaning IV. Flame cleaning 

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Description :

List various types of flames used in gas welding. 

Answer :

Answer: 1. Neutral Flame 2. Oxidizing Flame 3. Carburizing Flame 

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