Document 0Jrv1DwEaJMbMYn743ewgXBQb

POMPS 2 SECTION 2.1 QUESTIONS 2.1-1 2.1-2. Piston pumps are a type of positive displacement pump. (reciprocating. rotary) or False, In a single-acting pump, liquid is admitted on one stroke and discharged on a second stroke. 2.1-3. The following simplified illustration represents single-stroke piston pump. Identify its parts b writing the correct number in each blank. dLa. connecting rod b. oL Piston J_c. Cylinder d. Piston rings e. Suction valve f. Re Discharge valve. ><: m 1 DO 009665 CONFIDENTIAL POMPS 2 Section 2 1 (cont'd) Questions 2.1-4. True or (fa^se~>s A double-acting simplex piston pump uses two pistons to increase the amount of liquid that the pump is able to move. 2.1-5. (a) piston pumps provide (Single-acting, Double-acting) a smoother discharge of liquid than piston pumps. double-acting) (b)_______________ ______ (single-acting",-" : '-- DO 009666 2 CONFIDENTIAL PUMPS 2 Section 2.2 .Questions 2.2-1. 2.2-2 The - that is used in some types of reciprocating pumps looks a lot like a piston, but it is usually long and smooth. The following is an illustration of part of a plunger- type pump. In the illustration the (suction,discharge) valve is open. 2.2-3. C_True_jz>r False. The amount of liquid that is discharged from a plunger pump can be controlled in many cases by adjusting a mechanical linkage called a stoke adjustment. 2.2-4. (Truejpr False. Diaphragm pumps can use mechanical meafTS7 air pressure, or hydraulic pressure to cause the diaphragm to flex. 3 PUMPS 2 Section 2.2 (cont'd) -^-Questions 2.2-5. The following illustration represents a diaphragm pump and associated components. Identify the indicated components by writing the correct number in each blank. a. Compressed air inlet and exhaust b. *2, Discharge valve c. / Diaphragm d. V Suction valve DO 009668 CONFIDENT!At 4 PUMPS 2 Section 2.3 .Questions 2.3 Screw umps and gea pumps are both examples of pumps. (reciprocating, rotary) 2.3-2 Identify the indicated components of the progressing cavity screw pump shown below. Write the correct number in each blank. a. Suction b. I Screw c* ^ Bearing d. Discharge 2.3- 3. In a typical two-screw pump, the screw that is connected to a driver is called the (a) (idler, power) screw, while the other screw is called the (b) screw. (idler, power) 2.3- 4. or False. As the gears of an external gear pump rotate, liquid is trapped in the spaces between the gear teeth and the pump casing. DO 009669 CONFIDENTIAL 5 Section 2.3 (cont'd) Questions POMPS 2 2.3-5. 2.3-6. Circle the correct answer. In a typical internal gear pump, the rotates inside the gear. a. Spacer, idler b. Idler, power Power, idler d. Rotor, spacer gear What is the purpose of a pressure relief device in a positive displacement pump? fpib gelrULP j>loTn.aTS pot*f DO 009670 CONFIDENTIAL 6 POMPS 2 Section 2.4 Questions 2.4-1. True or(.Falser-5 Lobe pumps are similar to gear pumps because they have rotating parts that mesh together. 2.4-2. Circle the correct answer. The pump illustrated below is a pump. a. Progressing cavity Lobe c. Sliding vane d. Flexible vane 2.4-3. or False. Vane pumps use a sweeping notion to move iquid through th e pump. 2.4- 4. The advantage of using a flexible vane pump is that the vanes bend to form a seal with the allowing the pump to be used in vacuum applications. 2.4- 5. In a tubing pump, are used to force liquid through the tubing and out of the pump. CO 009671 CONFIDENTIAL 7 PUMPS 2 Section 2.5 Questions 2.5-1. (True?or False. Paths for liquid flow into and out of a pti mp are provided by opening and closing the appropriate valves. 2.5- 2. The steam end of a duplex, double-acting piston pump is brought up to operating temperature to (slowly, quickly) help avoid breaks and cracks. ' 2.5- 3. True orCFalse?) The condensate that collects in an idle duplex double-acting piston pump does not have to be removed before startup. 2.5-4 Why is it critical to have the discharge valve of a positive displacement pump open during startup? JO plu'O pJiLl 70 40 2.5-5. What is the _l_ast step performed during the shutdown procedure shown in the videotape example? y/siV(t D 00967? CNFjD BNTTAl. 8 PUMPS 2 Section 2.6 - Questions 2.6-1 2.6-2. CTruejbr False. One of the first steps of a typical rotary pump startup procedure is to make sure that the pump has a liquid supply to tis suction. After the appropriate suction valves were opened, what was the next step in the videotape example? u<Je> op 2.6-3. A> _ that is trapped in the suction line can cause a pump to bind, decreasing its effectiveness in pumping liquid. 2.6-4. Circle the correct answer. During operation, a rotary pump should be checked fo: a. Abnormal leaks b. Excessive heat c. Abnormal discharge pressure All of the above e. Only a. and c. 2.6-5. Oil flow from a fuel oil pump can be blocked off by closing valves in the line. (discharge, vent) Do 009673 confidential 9