a- Which of the following is a turning pair? (4P) (A) Piston and cylinder of a...

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a- Which of the following is a turning pair? (4P) (A) Piston and cylinder of a reciprocating steam engine (B) Shaft with collars at both ends fitted into a circular hole (C) Lead screw of a lathe with nut (D) Ball and a socket joint b- Lower pairs are those which have (4P) (A) Point or line contact between the two elements when in motion (B) Surface contact between the two elements when in motion (C) Elements of pairs not held together mechanically (D) Two elements that permit relative motion c- The mechanism forms a structure, when the number of degrees of freedom (n) is equal to (4P) (A) 0 (B) 1 (C) 2 (D) -1 d- The two elements of a pair are said to form a higher pair, when they (4P) (A) Have a surface contact when in motion (B) Have a line or point contact when in motion (C) Are kept in contact by the action of external forces, when in motion (D) Permit relative motion e-Kinematic pairs are those which have (4P) (A) Point or line contact between the two elements when in motion (B) Surface contact between the two elements when in motion (C) Elements of pairs not held together mechanically (D) Two elements that permit relative motion a- Which of the following is a turning pair? (4P) (A) Piston and cylinder of a reciprocating steam engine (B) Shaft with collars at both ends fitted into a circular hole (C) Lead screw of a lathe with nut (D) Ball and a socket joint b- Lower pairs are those which have (4P) (A) Point or line contact between the two elements when in motion (B) Surface contact between the two elements when in motion (C) Elements of pairs not held together mechanically (D) Two elements that permit relative motion c- The mechanism forms a structure, when the number of degrees of freedom (n) is equal to (4P) (A) 0 (B) 1 (C) 2 (D) -1 d- The two elements of a pair are said to form a higher pair, when they (4P) (A) Have a surface contact when in motion (B) Have a line or point contact when in motion (C) Are kept in contact by the action of external forces, when in motion (D) Permit relative motion e-Kinematic pairs are those which have (4P) (A) Point or line contact between the two elements when in motion (B) Surface contact between the two elements when in motion (C) Elements of pairs not held together mechanically (D) Two elements that permit relative motion