FREE Amazon Maintenance Technician Question and Answers
Intermittent welding has the benefit of being:
Explanation:
The fillet weld is done intermittently while using the intermittent welding joint welding technique. In addition to being more cost-effective (as fewer energy and materials are needed), it is also simpler to repair. Because the welding is not continuous, if it fails, only a small 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.
A ______ is used to stop an AC solenoid from "humming"
Explanation:
When activated by AC current, the current alternates between positive and negative peaks up to 60 times per second, changing direction often. Since the magnetic field inside the solenoid is proportional to the current, it follows that when the current drops to zero 60 times per second, it also drops to zero 60 times per second inside the solenoid. As a result, many times per second, the return spring temporarily outperforms the solenoid's actuation force. As a result of this action, the armature vibrates continuously, producing a buzzing sound and adding more stress to the solenoid's components.
A shade ring can provide a solution to this issue. A magnetic field is produced by the ring, a tiny conductive ring that is typically constructed of copper.
Which of the aforementioned equipment should you apply the splash technique lubrication on?
Explanation:
With the splash lubricating system, oil is mechanically splashed upward from pans or trays in the crankcase, creating a mist that lubricates the mechanism's internal components. Because the amount of oil in the crankcase will significantly affect the level of lubrication, the splash method is not accurate. Insufficient lubrication will result from a low oil level, whereas excessive lubrication could be caused by a high oil level. Because of this, splash technique lubrication is only employed in relatively tiny engines, like lawnmowers.
When installing components in a pneumatic system, the proper order is:
Explanation:
The filter purges the air of small particles and contaminants, the regulator delivers air at a predetermined, constant pressure, and the lubricator supplies air.
Megohmmeters are typically employed to measure:
Explanation:
Megohmmeters are ohmmeters (devices for measuring resistance) with a scale of megohms (millions of ohms), which allows them to measure extraordinarily high resistances. As a result, they are used to evaluate insulation and other materials with extremely high electrical resistance.
It is possible that an AC power system's power factor WILL NOT be:
Explanation:
The power that is actually doing work in the system is known as REAL POWER (or active power) (power consumed by the resistive component of the circuit). in Watts [W] terms.
> REACTIVE POWER is the energy used by the system; it is not put to use and dissipates as electrostatic or magnetic fields that are induced. measured in reactive [Var] volt-amperes.
> REAL POWER and REACTIVE POWER are added together to create apparent power (we do not expand on that matter since it is not required). Because of this, it is either greater (in any actual AC system) or equal (in purely theoretical models) to the actual power.
A neutral flame differs between a carburizing flame and an oxidizing flame because:
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.