1) Which fluid is used in hydraulic power systems?
a. water
b. oil
c. non-compressible fluid
d. all of the above
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Answer
Explanation
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ANSWER: all of the above
Explanation:
No explanation is available for this question!
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2) Pressure of 1 bar is equal to
a. 14.5 psi
b. 145 psi
c. 12.5 psi
d. 145 x 10 -6 psi
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Answer
Explanation
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ANSWER: 14.5 psi
Explanation:
No explanation is available for this question!
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3) Adding an additive to water glycol fluids improves
a. flammability
b. viscosity
c. oxidation
d. all of the above
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Answer
Explanation
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ANSWER: viscosity
Explanation:
No explanation is available for this question!
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4) Viscosity of High Water Fluid is
a. greater than water
b. less than water
c. nearby water
d. none of the above
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Answer
Explanation
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ANSWER: nearby water
Explanation:
No explanation is available for this question!
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5) High Water Fluids contain
a. oil in water
b. water in oil
c. only water
d. none of the above
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Answer
Explanation
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ANSWER: oil in water
Explanation:
No explanation is available for this question!
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6) Match the following group 1 with group 2 and select the correct option:
Group 1 ---------------------------------------- Group 2
1. High water fluids ---------------------------- A. Water and synthetic chemical
2. Water in oil ------------------------------------ B. Fire-resistant fluid
3. Water glycol ----------------------------------- C. Oil in water
4. Synthetics -------------------------------------- D. Tiny droplets of water in oil
a. C – D – A – B
b. D – C – B – A
c. C – B – D – A
d. D – C – A – B
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Answer
Explanation
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ANSWER: C – D – A – B
Explanation:
No explanation is available for this question!
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7) What is the relation between temperature and viscosity for hydraulic oil?
a. temperature and viscosity vary linearly
b. as temperature decreases viscosity decreases at atmospheric pressure
c. as temperature increases viscosity decreases at atmospheric pressure
d. none of the above
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Answer
Explanation
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ANSWER: as temperature increases viscosity decreases at atmospheric pressure
Explanation:
No explanation is available for this question!
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8) What is the relation between temperature and specific weight for water glycol?
a. as temperature increases specific weight decreases
b. as temperature increases specific weight increases
c. temperature and specific weight vary linearly
d. none of the above
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Answer
Explanation
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ANSWER: as temperature increases specific weight decreases
Explanation:
No explanation is available for this question!
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9) At which pressure, petroleum oil used in hydraulic systems gets compressed by 1/2%?
a. 70 bar
b. 40 bar
c. 30 bar
d. 95 bar
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Answer
Explanation
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ANSWER: 70 bar
Explanation:
No explanation is available for this question!
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10) A fluid used in hydraulic systems should have
a. low oxidation resistance
b. high oxidation resistance
c. high oxidation enhancing ability
d. none of the above
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Answer
Explanation
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ANSWER: high oxidation resistance
Explanation:
No explanation is available for this question!
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