41.  The inherent characteristic of an equal percentage valve relating flow rate 'q' with valve stem movement 'x' are described by the equation 
a.  A 
b.  B 
c.  C 
d.  D 
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Answer: (a).A

42.  Curve III in the below diagram represents a/an 
a.  dilatent fluid 
b.  pseudo plastic fluid 
c.  ideal plastic 
d.  none of these 
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Answer: (b).pseudo plastic fluid

43.  Colebrook equation for friction factor in turbulent flow is given by following equation. It reduces to Nikuradse equation for a value of ε/D equal to 
a.  0 
b.  1 
c.  ∞ 
d.  0.5 
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Answer: (b).1

44.  The percentage slip in a reciprocating pump set is given by the % of (where, Q₁ = actual discharge Q₂ = theoretical discharge) 
a.  A 
b.  B 
c.  C 
d.  D 
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Answer: (d).D

45.  A particle A of diameter 10 microns settles in an oil of specific gravity 0.9 and viscosity 10 poise under Stoke's law. A particle B with diameter 20 microns settling in the same oil will have a settling velocity 
a.  same as that of A. 
b.  one fourth as that of A. 
c.  twice as that of A. 
d.  four times as that of A. 
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Answer: (b).one fourth as that of A.
