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Doctors Medicines MCQs Q&A

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In a dicot pot herb, vaseline/vegetable oil was applied on the upper surface of one leaf (Experimental leaf 1) and on the lower surface of another leaf (Experimental leaf 2). Vaseline/Vegetable oil was not applied to the control leaf. The plant was deliberately not watered for several days. Which leaf will dry up last?
Three statements are followed by four conclusions numbered I, II, III and IV. You have to consider these statements to be true, even if they seem to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: 1. No plant is a flower. 2. No flower is a leaf. 3. Some plants are leaf. Conclusions: I. No leaf is a plant. II. No leaf is a flower. III. Some flowers are plants. IV. All leaf are plants.
The shackle provides . . . . . . . . action to the leaf spring.
A teacher of Class VII demonstrates the following activity in the class: “A leaf is put in a test tube and spirit is poured over it. Then the test tube is put in a beaker half-filled with water and heated till the leaf is discoloured. The leaf is then taken out and a few drops of iodine are put on it. The leaf turns blue-black in colour.” After this activity, the teacher gives some questions for the assessment of various indicators of learning. Which of the following would assess ‘analysis’?
A teacher puts a leaf in a test tube and puts sprit (alcohol) in it. Now he heats the test tube till all the green colour comes out. Then he takes out the leaf and pour some iodine solution on it.  The students write the following statements in their notebooks. A) The leaf turns blue black in colour  B) The leaf contains starch  Which of the following statements is correct. 
When a closely-coiled helical spring of mean diameter (D) is subjected to an axial load (W), the deflection of the spring ($$\delta $$) is given by (where d = Diameter of spring wire, n = No. of turns of the spring and C = Modulus of rigidity for the spring material)
A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is $$\tau $$. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be
An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'.
The longest leaf in a leaf spring is called centre leaf.
A leaf spring consists of 3 extra full length leaves and 14 graduated length leaves. The maximum force that can act on the spring is 70kN and the distance between eyes of the spring is 1.2m. Width and thickness of the leaves are 100mm and 12mm respectively. If modulus of elasticity is 207000N/mm², calculate the initial nip.