1) What is the advantage of PLC?
a. easy to find errors
b. replacements can be easily made
c. PLC's are easily programmed
d. all of the above
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Answer
Explanation
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ANSWER: PLC's are easily programmed
Explanation:
No explanation is available for this question!
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2) Which of the following pumps saves more power?
a. single pump
b. double pump
c. single and double pump use same amount of power
d. none of the above
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Answer
Explanation
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ANSWER: double pump
Explanation:
No explanation is available for this question!
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3) What are different operations performed by PLC's?
a. Boolean logic
b. Timing
c. Arithmetic
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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4) Which of the following statements is true, for two pumps used in circuit when initially fast operation is performed to reach a job and feeding operation is done at a slow speed?
a. initially to reach a job, a tool must be connected to a pump of high discharge and low pressure
b. initially to reach a job, a tool must be connected to a pump of low discharge and high pressure
c. for feeding operation low discharge low pressure pump is required
d. none of the above
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Answer
Explanation
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ANSWER: initially to reach a job, a tool must be connected to a pump of high discharge and low pressure
Explanation:
No explanation is available for this question!
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5) Cylinder has a bore area of 300 cm 2 and velocity of 180 cm/min. Calculate the flow rate of a pump
a. 55 l/min
b. 50 l/min
c. 54 l/min
d. none of the above
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Answer
Explanation
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ANSWER: 54 l/min
Explanation:
No explanation is available for this question!
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6) Which valve is used to block the accumulator from the system for the purpose of safety?
a. pilot valve
b. needle valve
c. detent valve
d. all of the above
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Answer
Explanation
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ANSWER: needle valve
Explanation:
No explanation is available for this question!
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7) Leakage in rotary chucks can be compensated by
a. flow control valve
b. pilot operated check valve
c. accumulator
d. all of the above
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Answer
Explanation
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ANSWER: accumulator
Explanation:
No explanation is available for this question!
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8) Which of the following statements is true?
a. Meter-in feed circuits have speed control in two directions
b. Standard block feed circuits have speed control in two directions
c. Tank line feed control systems have speed control only in one direction
d. all of the above
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Answer
Explanation
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ANSWER: Standard block feed circuits have speed control in two directions
Explanation:
No explanation is available for this question!
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9) Which area does the part shown below indicate?
a. rod area
b. full bore area
c. annulus area
d. none of the above
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Answer
Explanation
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ANSWER: annulus area
Explanation:
No explanation is available for this question!
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10) Why is the pilot operated check valve used in clamping operation?
a. to reduce leakage in spool valve
b. to avoid decrease in pressure during clamping
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: both a. and b.
Explanation:
No explanation is available for this question!
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