Engineering, Control Systems. Test 61

The latest obtained system values are fed into the computer and compared with previous ones. The analysis obtained before has to be compared with the latest analysis. This is called _____

trend analysis and maintenance prediction.
wear down and breakdown prediction.
wear down and maintenance scheduling.
material fatigue and maintenance scheduling.

The operating function of the valve on which this pneumatic valve motor is fitted will be _____

air to open (bottom connection).
pressure to open (positive manometer reading).
air to close (top connection).
vacuum to open (negative manometer reading).

A pressure reducing valve works according to the principle of balance of forces, in this case the force P2 acting on the membrane is in balance with the force of the _____

the membrane spring.
the ball valve spring.
inlet pressure P1.
the ball valve.

What approximate diameter is the work piece machined to before external thread cutting?

Slightly less than the outside thread diameter.
To slightly more than the outside thread diameter.
It doesn't matter as long as it's within 0.2mm of the thread diameter.
To the outside thread diameter.

By what parts is the outlet pressure Pu of this pneumatic transmitter directly controlled ?

By the stand of the valves V and B.
By the restriction R.
By slight fluctuation of supply pressure.
By spring tension in S.

What is the disadvantage of using clamps to secure work piece on the shaping machine?

Restricts tool travel.
Table too close to toolbox.
Insufficient security.
Clamps may prevent tool from traversing entire work surface.

The valve positioner acts on the principle of the balance of forces. The tension of part _____ ( _____ ) is to be in balance with the force of the controller pressure which acts on part _____ ( _____ ).

9 (spring), 18 (membrane)
12 (membrane), 6 (feedback lever)
4 (relays), 12 (membrane)
9 (spring), 11 (supply valve)

If a fault occurs in this power supply system, the best and fastest way to locate this fault is by _____

calling the electrician.
checking the input voltage.
checking the fuses.
checking supply volts, fuses then the Trouble Shooting Chart.

Review Answers

Engineering, Control Systems. Test 61

Engineering, Control Systems. Test 61

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