FREE Ramsay Maintenance Question and Answers
Megohmmeters are typically employed to measure:
Explanation:
Megohmmeters are ohmmeters, which measure resistance on a scale of megohms. They can measure very high resistances (millions of ohms). As a result, they are employed to test materials with extremely high electrical resistance, such as insulation.
Intermittent welding has the benefit of being:
Please select 2 correct answers
Explanation:
The fillet weld is done intermittently while using the intermittent welding joint welding technique. In addition to being more cost-effective (as less energy and materials are needed), it is also simpler to repair. Because the welding is not continuous, if it fails, just a tiny portion of the material will be damaged before the stress is released, making the damage easier to fix. If the welding had been continuous, the entire junction would have been destroyed and would have needed to be rewelded.
Intermittent welding, by definition, is weaker than full welding.
When installing components in a pneumatic system, the proper order is:
Explanation:
The Filter, Regulator, and Lubricator unit, also referred to as the FRL unit, is made to filter the air leaving the compressor before it enters the system.
The lubricator produces an air and oil mist to lubricate the system's components, enhancing their performance and extending their useful lives. The filter purges the air of small particles and contaminants, the regulator delivers air at a predetermined, constant pressure, and the lubricator supplies air.
In order to prevent contaminated or lubricating oil particles from impairing the regulator's function, the filter must be put before the regulator, which must then be installed before the lubricator. Additionally, the filter is put in place before the lubricator to prevent the air from being filtered of oil particles.
Which of the following machines is the splash method of lubrication advised for?
Explanation:
The interior components of the mechanism are lubricated by a mist of oil that is mechanically splashed up from pans or trays in the crankcase in the splash lubrication system. The oil level in the crankcase will have a significant impact on the lubrication level, making the splash approach problematic. A high oil level may result in excessive lubrication, whilst a low oil level will result in insufficient lubrication. Splash technique lubrication is therefore limited to extremely tiny engines, like lawnmowers.
An AC power system's power factor may NOT be:
A neutral, carburizing, and oxidizing flame differ from one another due to:
Explanation:
The acetylene-oxygen content of each flame is what distinguishes the three flames from one another. The exact ratio required for combustion is present in a neutral flame. The neutral flame serves only as a heater and has no impact on the welded metal.
The extra acetylene in the carburizing flame leads the welded metal to absorb carbon.
The extra oxygen in the oxidizing flame causes the welded metal to oxidize. It is mostly used for non-ferrous metals like bronze and copper due to its oxidizing action.
A _____ is used to stop an AC solenoid from "humming."
Explanation:
The direction of the current can change up to 60 times per second when an AC current is used to activate it, alternating between positive and negative peaks. As a result, the current decreases to zero 60 times per second, and as a result, the magnetic field within the solenoid also drops 60 times per second (because the magnetic field is proportional to the current). As a result, many times per second, the return spring's actuating force temporarily exceeds that of the solenoid. This motion causes the armature to vibrate continuously, which increases the stress on the solenoid's components and produces a buzzing sound.
A shading ring can resolve this issue. The ring, a tiny, electrically conductive ring typically formed of copper, produces a magnetic field that is 90 degrees out of phase with the solenoid's own magnetic field, holding the armature in place when the current occasionally falls to zero.