In a reciprocating pump without air vessels, the friction head in the delivery pipe is maximum at crank angle q = (a) 0° (b) 90° (c) 60° (d) 180°

1.In a reciprocating pump without air vessels, the friction head in the delivery

 

pipe is maximum at crank angle q =

(a) 0° (b) 90° (c) 60° (d) 180°

2. * In a reciprocating pump without air vessels, the acceleration head in the

suction pipe is maximum at the crank angle value of q =

(a) 0° (b) 90° (c) 60° (d) 180°

3. The indicator diagram of a reciprocating pump is a plot of

(a) work done vs stroke length

(b) acceleration head vs stroke length

(c) pressure head vs stroke length

(d) crank speed vs power developed

4. A double-stoke reciprocating pump has its stroke length reduced by half and

the speed is doubled. This would cause the discharge to

(a) decrease by 25% (b) remain unaltered

(c) decrease by 50% (d) increase by 100%

5. Figure 6.19 shows an indicator diagram of a single-acting reciprocating pump. This indictor diagram belongs to

(a) a reciprocating pump with two air vessels, one each in suction pipe and

delivery pipe at some distance from the cylinder

(b) a reciprocating pump with one air vessel

(c) a reciprocating pump with two ideal air vessels

(d) a reciprocating pump with no air vessels

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