1) What is the DC range of of solenoids in pneumatic systems?
a. 12 V and 24 V
b. 110 V and 220 V
c. both a. and b.
d. none of the above
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Answer
Explanation
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ANSWER: 12 V and 24 V
Explanation:
No explanation is available for this question!
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2) How is strong magnetic field in a solenoid achieved?
a. strong magnetic field in a solenoid is achieved, if coil acts as conductor
b. coil is surrounded by a iron frame
c. iron core is placed at the centre of the coil
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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3) Why are electromechanical relays more popular than solid state relays?
a. they are reliable
b. less costly
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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4) In electropneumatic circuits,
a. spool is shifted by signal air
b. spool is shifted by control air
c. spool is shifted by electromotive force
d. all of the above
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Answer
Explanation
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ANSWER: spool is shifted by electromotive force
Explanation:
No explanation is available for this question!
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5) In which circuits, relay of low voltage and low current is used to make open or close contact?
a. high voltage and high current circuit
b. low voltage and low current circuit
c. high voltage and low current circuit
d. low voltage and low current circuit
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Answer
Explanation
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ANSWER: high voltage and high current circuit
Explanation:
No explanation is available for this question!
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6) Which of the following statements is true?
a. electromagnetic relays have high reliability at more cost
b. electromagnetic relays use low current and voltage, to have open or close contact in high voltage and current circuit
c. air pressure passed to pressure electric converter opens a contact which energizes a circuit for the flow of electric contact
d. all of the above
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Answer
Explanation
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ANSWER: electromagnetic relays use low current and voltage, to have open or close contact in high voltage and current circuit
Explanation:
No explanation is available for this question!
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7) How is proximity switch differentiated from limit switch?
a. proximity switch is activated when moving parts have physical contact with it
b. proximity switch is activated when non-moving parts have physical contact
c. proximity switch is activated when moving parts are close to it
d. none of the above
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Answer
Explanation
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ANSWER: proximity switch is activated when moving parts are close to it
Explanation:
No explanation is available for this question!
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8) What is the part, shown in below diagram of 3/2 valve, called?
a. manually operated valve
b. pilot operated valve
c. pressure electric converter
d. none of the above
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Answer
Explanation
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ANSWER: pilot operated valve
Explanation:
No explanation is available for this question!
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9) Which of the following statements is true for cascade method which is used to draw a pneumatic circuit?
a. signal processing valves are connected in parallel
b. when the number of signal processing valves are greater than 4, the signals are strong
c. cascade method does not consider the cost factor
d. all of the above
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Answer
Explanation
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ANSWER: cascade method does not consider the cost factor
Explanation:
No explanation is available for this question!
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10) What is the notation used for the sequence of operations mentioned below?
1. Cylinder A undergoes forward stroke
2. Cylinder B undergoes forward stroke
3. Cylinder A undergoes backward stroke
4. Cylinder B undergoes backward stroke
a. A – B – A + B +
b. A + B – A + B –
c. A + B + A – B –
d. A + B – A + B –
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Answer
Explanation
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ANSWER: A+ B+ A– B–
Explanation:
No explanation is available for this question!
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