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Consider the following statements regarding cams : 1. A cam in which the follower moves radially from the centre of rotation of the cam is known as a disc cam. 2. A globoidal cam is a double-disc cam, the two discs being keyed together and are in constant touch with the two rollers of a follower. 3. A conjugate cam can have two types of surfaces, convex or concave. 4. In a spherical cam the follower oscillates about an axis perpendicular to the cam, the axis of rotation of the cam. Which of the above statements are correct?  
The use of energy from sunlight by plants doing photosynthesis is the basis of life on earth. Which of the following statement is correct for photosynthesis? 1. chlorophyll (green pigment of the leaf), light, and CO2 are required for photosynthesis to occur. 2. photosynthesis occurs only in the green parts of the leaves in the presence of light.  3. chlorophyll is the chief pigment associated with photosynthesis.
Consider the following statements regarding radial cam nomenclature: 1. Motion of the trace point describes movement of the follower 2. The curve generated by the locus of trace point is called cam profile 3. Actual working curve of cam is called pitch curve 4. Smallest circle that can be drawn tangential to cam profile is called base circle Which of these statements are correct? 
Consider the following statements regarding the crassulacean acid metabolism (CAM) plants and choose the correct answer:
1. CAM plants can synthesize large amounts of malic and isocitric acids at night
2. These are found in dry habitats
3. These are succulents with thick fleshy leaves, or, when leaves are absent, a swollen photosynthetic stem
4. These plants are generally slow growing
Consider the following statements.
1. Carbon dioxide, chlorophyll and sunlight all are essential for photosynthesis.
2. Rate of photosynthesis is maximum in red light and minimum in green light.
3. Increase in O2 concentration decrease photosynthesis.
Which of the statements given above is/are correct about photosynthesis ?
Consider the following statements and choose the correct answer:
1. Intense or strong light retards the growth of shoot
2. Shade plants are shorter and stockier than sun plants
3. Shade plants have dense covering of hairs while sun plants are less hairy
4. The stems of shade plants are taIler and more branched than that of sun plants
In the case of a circular arc cam with a flat-faced reciprocating follower, when the follower is in contact with nose of cam, the external spring force required for maintaining the contact between follower and cam is
A cam should be designed only using uniform rise and fall within half of the cam, the remaining is dwell period, and without any dwell period in between the rise -fall periods and rise and fall periods should be same. The maximum rise in follower is 30 mm. How much the follower will rise when the follower is 120 degrees from its initial position of a cam?
A cam should be designed only using uniform rise and fall within half of the cam, the remaining is dwell period, and without any dwell period in between the rise-fall periods and rise and fall periods should be same. The maximum rise in follower is 45 mm. How much the follower will rise when the follower is 45 degrees from its initial position of a cam?
A cam should be designed only using uniform rise and fall within the second half of cam profile, the first half is dwell period, without any dwell period in between the rise and fall periods and rise and fall periods should be same. The maximum rise in follower is 45 mm. How much the follower will rise when the follower is 120 degrees from its initial position of a cam?