Example:
(Elements are in bold)
1. Noun as element
Mary goes to the party
John goes to the party
2. Verb as element
John goes walking
John goes running
3. Clause as element
They go to the party
They don’t like it
In a complete sentence, these elements are often joined together by coordinates like and, or and but or correlative (paired) conjunctions both… and, neither… nor and not only…but
Example:
(elements, coordinates/correlative conjunction)
Both Mary and John go to the party
John goes walking and running
They go to the party but they don’t like it
The key to achieve parallelism is to make sure the elements are of the same form (noun, verb, adverb and clause) and are of the same tense (past, present, -ing). Coordinates and correlative conjunction can be use to locate the elements as they are located next or near the elements
Example:
1. Mixing of tenses
Not parallel: Mary loves hiking, swimming and goes (simple tense) to park
Parallel: Mary loves hiking, swimming and going to park
2. Changing of forms
Not parallel: The dictionary can be used for these purposes: to find word meanings, pronunciations, correct spellings, and looking up irregular verbs (start with a verb).
Parallel: The dictionary can be used for these purposes: to find word meanings, pronunciations, correct spellings, and irregular verbs.
Exercise:
Locate the 5 mistake in this article and make the necessary correction
(1)For a variety of reasons, this situation is changing, so designers need to have an appreciation of what condition monitoring is and the benefits it offers, as well as how it can be implemented.
(2)Monitoring the condition of critical power transmission elements enables component degradation to be identified before it causes a failure. For example, bearings and using gears can be monitored using vibration sensors to detect when wear or damage is starting to occur. Brakes and clutches, on the other hand, may be better monitored using thermal imaging.
(3)By detecting deterioration early, unplanned stoppages can be avoided and stop further damage. For example, a seized bearing could cause the shaft it is supporting to stop suddenly; inertia stored in other components could then cause damage to the shaft, bearing mounts or other components, leading to the repairs being far more complex and costly than simply replacing the failed bearing. Condition monitoring can therefore be thought of as a cost-effective insurance policy.
(4)Condition monitoring can also have direct benefits for the machine builder, especially if an extended warranty or service agreement is supplied with the machine. In addition, the conditioning monitoring system can be used to get a ‘signature’ for the machine before it is shipped, which enables any damage during transportation, trials or commissioning to be identified. Pre-delivery checks can also highlight any components that either faults are present when supplied or are damaged during installation.
(5)Although some end user customers are starting to specify that condition monitoring must be installed on new machinery, most still view it as a luxury rather than a sound investment. And very few machine builders incorporate condition monitoring as standard.
(6)Vibration monitoring is the principle form of machine condition monitoring for power transmission systems and today there is a vast range of vibration sensors form which to choose. Hansford Sensors is a relatively young company that has recently introduced a new range of vibration sensors for use on rotating machinery. The HS-130 series sensors are compact devices having both a small body diameter and weighing just 30g. These features make the sensors useful where space is limited or heavier sensors could affect the machinery.
(7)With a robust stainless steel construction, protection to IP65 standard and non-over-braided, fire-retardant, twin-core screened cable and the sensors are capable of withstanding harsh industrial environments. To complement these 100mV/g accelerometers, Hansford offers the HS-BE series of sensor connection boxes that usage is easy, protected to IP55 and capable of monitoring up to four sensors via BNC connectors.
Answers (Highlight to view):
(Paragraph 2) For example, bearings and using of gears can be monitored using vibration sensors to detect when wear or damage is starting to occur
(Paragraph 3) By detecting deterioration early, unplanned stoppages can be avoided and further damage can be stopped
(Paragraph 4) . Pre-delivery checks can also highlight any components that either are faulty when supplied or are damaged during installation
(Paragraph 6) The HS-130 series sensors are compact devices having both a small body diameter and has a weight of just 30g
(Paragraph 7) To complement these 100mV/g accelerometers, Hansford offers the HS-BE series of sensor connection boxes that are easy to use, protected to IP55 and capable of monitoring up to four sensors via BNC connectors.
Reference: Condition monitoring is as cost-effective as insurance (2008). Retrieved september 7th, 2008 from source http://www.engineerlive.com/asiapacific-engineer/20080601/power-transmission/1.3.1065.1070/20339/condition-monitoring-is-as-costeffective-as-insurance.thtml
