68) A pump with its center located at a level above the fluid it is pumping is s

Question

68) A pump with its center located at a level above the fluid it is pumping is said to have a: A) Suction head B) Velocity head C) Static head D) Suction lift 69) Which of the following equipment would you classify as a heat exchanger? A) An electric generator B) A boiler C) A pump D) A car engine 70) What is the main reason for having seal water in the packing of a centrifugal pump? A) For sealing of the packing B) For cooling and lubrication C) To wash the dirt away D) To seal the bearing 71) The device used in electrical circuits to prevent damage from overload is a: A "Switch B) Connector C) Resistor D) Fuse TD Ansver questions 72 through 76 based on the pump drawing on the following page. 72) What type of puap is shown in the drawing? A) Plunger pump B) Centrifugal pump C) Screw pump D) Diaphragn pump 73) Whatmechanismisusedto reduce and transmit the motor speed to the pump counter shaft? · , A) Rack and pinion gearing B) Direct drive C) Hain and pinion gears D) "V" belts and pulleys

Explanation / Answer

68) if pump delivering fluid is located at a level above the fluid then pumping is said to have a suction heat, as pump has to generate more head to suck the fluid to the rotors.

So option A

69) a heat exchanger is a device where heat transfer takes place from one fluid to other. So here boiler is a heat exchanger.

So option B

70)seal wter is kept mainly for cooling and lubrication purposes.

So option B

71) to protect electrical device's damage from over loading ,fuse plugs are used.as the fuse is made of lead -tin alloy has very low melting point.when suddenly voltage increases the fuse wire melts and cuts the circuit.

So option D

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