19 - Eat 4

Question 1

Pipe sizes are specified by _____ size and wall thickness A) Index B) Negative C) Nominal D) Positive

Answer 1

C) Nominal pg 67

Question 2

The schedule number for standard pipe is? A) 100 B) 50 C) 40 D) 30

Answer 2

C) 40 (Schedule 40) pg 67

Question 3

One advantage of tubing over pipe is the ease of _____ to shape. A) Elastomer B) Bending C) De-greasing D) Cutting

Answer 3

B) Bending pg 72

Question 4

The specified sizes for tubing refer to the? A) I.D. (inside diameter) B) O.D. (outside diameter) C) Sub-plate D) Fitting

Answer 4

B) O.D. (outside diameter) pg 72

Question 5

Sealing between sections of tubing is obtained by the use of various types of? A) Valves B) Elastomer C) Fittings D) Fluids

Answer 5

C) Fittings pg 73

Question 6

The four primary purposes of hydraulic fluid are? A) Transmission power B) Cooling C) Lubricate and seal D) All of the above

Answer 6

D) All of the above chapter 3

Question 7

Lip type seals are used principally on _____ shafts. A) Permanent B) Rotating C) Pressure D) Rigid

Answer 7

B) Rotating pg 85

Question 8

An elastic or rubber-like material that contains no natural rubber is called an? A) Additive B) Elastomer C) Emulsifier D) Illuminator

Answer 8

B) Elastomer pg 87

Question 9

Nitrile (Buna-N) has a reasonably wide temperature range, which is ______ °F A) 100 degrees to 500 degrees Fahrenheit B) 60 degrees to 500 degrees Fahrenheit C) 40 degrees to 250 degrees Fahrenheit D) 100 degrees to 250 degrees Fahrenheit

Answer 9

C) 40° to 250°F pg 88

Question 10

One of the several ways to reduce leakage is with the use of ______ mounted valves. A) Surface B) Back C) Sub-plate D) Front

Answer 10

B) Back pg 88

Question 11

Back mounting refers to panel type installations where pipe or tubing is _____ connected to sub-plates. A) Temporarily B) Permanently C) Alternately D) Sometimes

Answer 11

B) Permanently

Question 12

What type of seal is installed in an annular groove? A) Dynamic B) T-ring C) O-ring D) Cup

Answer 12

C) O-ring pg 83

Question 13

After installation a seal began to wear quickly and leak, which meant it was probably not _______ before installation. A) Measured B) Lubricated C) Cleaned D) Back-mounted

Answer 13

B) Lubricated pg 90

Question 14

At too high temperature a deal may harden, swell or ____. A) Blow B) Vibrate C) Sandwich D) Soften

Answer 14

D) Soften pg 90

Question 15

What type of inexpensive sealing material is widely used in modern hydraulic systems? A) Nitrile B) Silicone C) Teflon D) Viton

Answer 15

A) Nitrile pg 87