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CDC's > Test 2 > Flashcards

Test 2 Flashcards

1
Q

When reinstalling a manual valve, which bolts should you insert first?

A

Bottom

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2
Q

why must care be taken when installing a valve box over a pipe valve?

A

To ensure proper alignment of the valve key to the valve operating nut

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3
Q

What is most common type American Petroleum Institute (API) 610 pump used Air Force (AF) fuel systems?

A

Single-stage centrifugal, radial-split case, with end suction and top discharge

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4
Q

What type packing is most commonly used on globe valves?

A

Teflon string

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5
Q

What happens when a base and an acid are mixed?

A

Neutralization

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6
Q

What is the first step in removing a General Twin Seal plug valve operator?

A

Close the main valve

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7
Q

What written documents explain points that are not readily explained by drawings?

A

Specifications

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8
Q

Why should you never never allow a valve box to rest on a pipe?

A

The valve box may damage the pipe

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9
Q

What type valve used in fuel systems must operate from fully closed to fully open with a 90-degree rotation?

A

Ball

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10
Q

In which storage area would you find routinely used, high-use materials, such as polyvinyl chloride (PVC) pipe, glue, cleaner, and nails?

A

Bench stock

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11
Q

When removing a manual valve from a fuel pipeline, which bolts on the valve should you loosen first to drain the fuel into a drip pan?

A

Bottom

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12
Q

What type of lubricant is used and how is it applied to the Blackmer pump ball bearings?

A

Lithium-based grease; hand-pressure gun

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13
Q

Non-lubricated plug valves generally fall into four main types including lift, movable-seat, resilient-liner, and…

A

double block and bleed (DBB)

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14
Q

How often is an American Petroleum Institute (API) 610 pump operationally inspected?

A

Quarterly

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15
Q

How many feet of head does 1 pound per square inch (psi) of water produce?

A

2.31

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16
Q

What determines the gallon per minute (gpm) delivery of a gear pump?

A

Space around gears and rpms turning the pump

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17
Q

The seat and disc of which valve must be removable without removing the entire valve from the pipeline?

A

Check

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18
Q

Which plan shows a top view of the building as if the tip was cut off (cross-sectional)?

A

Floor plan

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19
Q

When adjusting a deep-well pump’s impellers, the proper setting will give the minimal clearance needed to create the most efficient suction at the…

A

impeller’s eye

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20
Q

What should you do if the centrifugal pump binds after you have replaced parts in the self-priming pump portion of a Gilbarco pump?

A

Add a paper-thin gasket

21
Q

Metric wrenches are sized in

A

millimeters

22
Q

What is the study of the composition of matter?

A

Chemistry

23
Q

What type of work is not part of preventive maintenance (PM)?

A

Utilities operations

24
Q

What do you do to a base utility map any time you make a change in a utility system?

A

Note changes on prints and notify engineering for updates

25
Q

Which metric prefix equals 1,000?

A

Kilo

26
Q

How many different basic designs of gate valves are there?

A

2

27
Q

What type of valve is used to control the direction of flow in a system, but does not affect the rate of flow?

A

Check

28
Q

Which disease is commonly transmitted through drinking water?

A

Typhoid

29
Q

A 12-inch nonlubricated plug valve will have what type of operator?

A

Worm gear

30
Q

What is defined as the vertical distance from the surface of water to the point of use?

A

Head

31
Q

When testing the high-level setting of an altitude valve, you must monitor the…

A

tank water level when it is being filled

32
Q

What three views are used in working sketches?

A

Top, side, and isometric

33
Q

In order to align a pump and motor, usually you need to…

A

move the motor

34
Q

What would cause the 81AF-8, nonsurge check valve (CV), to fail to open?

A

Closed downstream manual valve

35
Q

What inspection and maintenance items are performed on a double block and bleed (DBB) plug valve during a routine scheduled interval?

A

Proper operation, operator lubrication, checking for leaks, and corrosion control

36
Q

What specialized equipment must you have to ensure system integrity when removing a valve from the system?

A

Blind flanges

37
Q

What is the weight of one gallon of water?

A

8.34 lb.

38
Q

The fuel system configuration that would not require you to manually bleed air out of the pipeline after a valve is replaced, involves pumping…

A

directly into a storage tank

39
Q

The components of the 81AF non-surge check valve (CV) are one CV flow control, a valve position indicator (VPI), and

A

two swing CV’s

40
Q

You slightly open a butterfly valve before relieving the line pressure to

A

equalize the pressure on both sides of the valve

41
Q

What component(s) of the mud hog diaphragm pump allows water to enter the pump at the inlet, traps the water, and then allows the water to be expelled at the pump’s outlet?

A

Clapper valves

42
Q

You are replacing a mechanical seal on a deep-well turbine with threaded couplings. With what do you cover the shaft threads to protect the mechanical seal’s O-ring?

A

Teflon tape

43
Q

What do you do if a pressure-relief valve is still malfunction after attempting pressure setting adjustments?

A

Replace the valve

44
Q

During repacking, you should place a gate valve in what position?

A

Closed

45
Q

The total measured shaft deflection allowed when aligning an American Petroleum Institute (API) 610 pump shaft and motor shaft must be less than how many inches?

A

0.002 inches

46
Q

What happens when an individual planning a job orders the incorrect material by mistake?

A

Civil engineering (CE) must accept the material, even if it cannot be used for that job.

47
Q

What is the study of living things?

A

Biology

48
Q

What is the smallest unit of an element?

A

Atom

CDC's (2 decks)

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