MSSC MAINTENANCE AWARENESS FINAL EXAM Questions with 100% verified Answers Latest Updates, Exams of Nursing

Download MSSC MAINTENANCE AWARENESS FINAL EXAM Questions with 100% verified Answers Latest Updates and more Exams Nursing in PDF only on Docsity!

MSSC MAINTENANCE AWARENESS

FINAL EXAM Questions with 100%

verified Answers Latest Updates 2024

GRADE A+

What are the three essential components of a chain drive system? - Answer: Chain, driver sprocket, driven sprocket. What is the sprocket ratio for a chain drive system with a driven sprocket with 54 teeth and an 18-tooth driver sprocket? - Answer three. A chain drive system includes a driver sprocket with 24 teeth and a driven sprocket with 72 teeth. If the driver shaft has 633 ft-lbs of torque, how much torque will the driven shaft have? - Answer 1899. This type of chain is often used on chain wrenches, forklifts, and other lifting devices. - ANSWER: Leaf chain. An offset chain's design eliminates the need for a connecting link. For this reason, it is commonly used in? - ANSWER Heavy-duty and low-speed applications Are multiple-strand chains being used? - ANSWER To send a significant amount of power How does a chain drive compare to a V-belt drive? - ANSWER is more efficient. When installing a chain drive system, inspect the motor and driven component for soft feet and excessive run-out. The shaft run-out should be no greater than? - ANSWER 0.002. Chain sag is determined by turning the sprockets until there is little or no chain sag on the side, then measuring the sag on the side. - ANSWER Taut,

Slack.

A chain should be replaced when it has grown longer than its original length.

• ANSWER 3 percent Is chain sag measured? - ANSWER: In between the sprockets A specific link used to reattach a chain is known as a link. - Answer Master A chain puller is a tool that holds two ends of a chain together. - ANSWER Master Link is installed. When utilizing a chain puller, how do the jaws open and close? - ANSWER A dial at the top of the tool What are the three components of a belt drive system? - ANSWER: Belt, driven sheave. Pitch is defined as the distance between a point and an object. - ANSWER Similar comparable point. A belt drive's pitch circle is what? - ANSWER The location in the belt indicates the center of the force delivered by the belt. A belt drive with a 12 - inch driver pulley and a 6 inch driven pulley has what pulley ratio? - Answer: 0. Which of the following relates to the calculation of a belt drive system's shaft speed and torque? - ANSWER Shaft speeds are inversely related to pitch diameter.

The driven pulley in the belt drive system is shown rotating at rpm. - ANSWER 1200 One significant feature of a timing belt is? - ANSWER: It will not slip during operation. The fractional horsepower (FHP) V-belt, commonly known as a light duty belt, is intended for low-power applications under _____ Hp. - Answer: 7. The V-belt should ride in the groove, with its top close to the top of the sheave; the V-belt should not come into contact with the sheave. - Answer: High, bottom. A should be used to inspect sheave groove wear. - Answer: Sheave gauge. The maximum allowed deflection force on a belt is greater than the minimum deflection force. - The answer is 50% greater. What is the definition of belt span? - Answer: The distance between the locations on the sheaves where the belt touches each sheave. What is the most basic method for testing belt tension? - Answer: Your sense of touch. When connecting a three-phase motor, the three lines (T1, T2, and T3) are typically connected to. - ANSWER: L1, L2, and L3.

Electricians use to protect the electrical wiring leading to the machine.

• ANSWER: rigid and flexible conduit. When the wire or foil strip inside a fuse melts, it is referred to be. - ANSWER, blown The distinction between a fuse and a circuit breaker is. - ANSWER: Circuit breakers can be reset and used again. The amount by which two electrical waveforms are out of phase is measured in . - Answer: degrees Overload protection that physically disconnects the motor rather than electrically is known as a(n). - ANSWER: overload clutch. What is the advantage of a circuit breaker over a fuse? - ANSWER: Can be reset. *T or F A motor starter's minimum number of contact sets is determined by the number of power leads required by the motor. - ANSWER: True When a circuit's current is excessively high, it is usually due to an overload or a . - ANSWER: Short circuit

The amount of energy spent by a circuit is known as. - ANSWER: Power A single-phase AC motor has only motor wires that connect to the power lines. - ANSWER: 2 A technician removed a piece of equipment from a disconnect, but the breaker remains tripped. The next step is to inspect the wiring to the disconnect and

. - ANSWER: Test the breaker again. Voltage is calculated using Ohm's Law formula, which is. - ANSWER: E = I x R When something gets stuck or jams in rotating equipment, it is protected by a(n) . - ANSWER: overload clutch. What is the most likely outcome if a motor is under excessive load? - ANSWER: Blow a fuse or trip a thermal overload. The overall power of an electrical circuit is calculated by adding the power consumption of each component. - ANSWER: Any Electrical wire that is exposed must be shielded by a pipe or tubing known as . - ANSWER: conduit.

Kirchoff's Voltage Law for a series circuit states that the total voltage drop in a series circuit equals the sum of the individual voltage drops. - ANSWER: sum. Hydraulics is concerned with the transmission and control of energy through a pressured system. - ANSWER Liquid Which of the following is not one of the five essential components of a hydraulic system? - ANSWER Pressure Which of the following is not considered a component of the power unit? - ANSWER Actuator. Which of the following does not appear in a hydraulic schematic? - ANSWER Liquid When developing a hydraulic schematic, one thing to remember is to always include the components. - Answer in a de-energized state. A cylinder could also be called an? - ANSWER Actuator. When oil enters a double-acting cylinder, it extends. - ANSWER Cap End What is a directional control valve used for? - ANSWER: Change the direction of the fluid.

The? shifts the spool of a directional control valve into different places. ANSWER Operator Most hydraulic motors are modified versions of? ANSWER Pumps The hydraulic motor converts hydraulic flow into what? - ANSWER: Rotating shaft speed Which of the following is not a type of hydraulic piston motor? - ANSWER: Spring loaded is used to remove undissolved contaminants from hydraulic fluid. - ANSWER filters Placing a filter in this position allows it to be cleaned without shutting down the machine. - Answer Offline is used to keep big particles from harming the pump and is stored in the reservoir. ANSWER Strainer A filter is intended to withstand the entire pressure of the hydraulic system. It has a replacement cartridge and is housed in a metal shell called a bowl. - ANSWER: Pressure line filter.

The filter, which is typically used on suction or return lines, has the look of a pressure line filter but cannot sustain the hydraulic system's maximum pressure. - ANSWER Cartridge-type filter The filter is designed for low-pressure applications and includes a replaceable cartridge that can be cleaned or changed. - Answer Spin-on Components are ranked according to the magnitude of the contaminants they remove. - ANSWER: hydraulic filters. The amount of dirt captured by a filter when the pressure reaches a certain point is known as the. - ANSWER The dirt-holding capacity A indicates when a filter's DHC has been reached. - ANSWER Bypass indication. In a mechanical transmission system, an electric motor is also referred to as a prime mover. There are three types of shaft-to-shaft power transmission: chain drive, gear drive, and belt drive. Companies often mandate that as part of their shop safety rules—ANSWER Safety glasses be worn.

Some rules for safe apparel to wear around equipment while it is running are: ANSWER Wear high fitting clothing and heavy duty shoes. OSHA requires safety glasses to protect your eyes in manufacturing environments. In addition to dress restrictions, another guideline you should follow with machines is: ANSWER Do not work on damp floors. In a lockout/tagout system, each person the machine being locked out. ANSWER: Places his own lock on The appropriate place to lock out an electrical control system is at the disconnect switch. To , workers should always interrupt the power at the motor disconnect--ANSWER Perform lockout/tagout OSHA recommends that workers inspect and test all equipment, presuming it is electrified until proven deenergized. Only the person who placed the lockout can remove a lockout on a mechanical equipment's power source.

Without bearings to hold a shaft in place, weights would produce - ANSWER: All of the above. The three types of loads exerted on bearings are radial, thrust, and combination. All electric motors require bearings positioned to the motor. ANSWER: Two, internally. A machine's moving component moves over the surface of a(n) bearing with only a lubricating film between them. ANSWER Plain A linear bearing's radial load capacity improves as the number of balls increases. A(n) bearing contains inner and outer races that allow it to carry larger axial loads than a typical ball bearing (ANSWER Angular Contact). ANSWER Angular Contact Bearings are superior at handling heavy axial loads. A machine shaft and bore should always be examined for out-of-roundness before completing what task? - ANSWER Pressing the bearing A shaft coupling may be out of round if a dial indication shows - ANY movement.

The following is an example of a tightening sequence. Which flange has the right tightening sequence? - ANSWER D Ultimate fatigue is caused by flexing metal bearings during use. High temperatures can limit the life of a bearing. Which of the following is not considered routine maintenance for anti-friction bearings? - ANSWER Replace traces. Making sure that a motor shaft is level - ANSWER Reduces the quantity of required shims The motor shaft runout is tested to ensure appropriate alignment of connecting components. The connection provides a reliable mechanism of transmitting from one shaft to another: torque and speed. couplings are employed as a safety device if torque overload develops.

The flexible jaw coupling has the advantage of allowing more misalignment than most other coupling systems. Before installing a flexible coupling, you check for - ANSWER Run out. A common indicator of a misaligned coupling is ANSWER Excessive vibration. Shaft alignment corrects two basic types of misalignment: angular and parallel. Before altering the motor position during a shaft alignment, always remove the

• ANSWER Dial indicator. What is the most typical application for feeler gauges, rulers, height gauges, and dial indicators? - ANSWER Alignment of Industrial Machinery The technique for aligning two shafts is to assess and adjust for and misalignment in two planes, vertical and horizontal—ANSWER Angular and parallel A gear is a wheel with teeth cut around its circumference. Which of the following is not correct concerning idler gears? - ANSWER Idle gears improve mechanical advantage.

The mechanical advantage of a gear drive system is the ratio of the number of teeth of the driven gear divided by - the number of teeth of the driver gear. The maximum allowed deflection force on a belt is greater than the minimum deflection force. - Answer: 50% greater. The simplest basic method for testing the tension of a belt is to use. - ANSWER: Your sense of touch. Pitch is the distance between a point and a. - ANSWER - comparable corresponding point. A belt drive with a 12" driver pulley and a 6" driven pulley has a pulley ratio of

. - Answer - 0. Belt drives have a pitch circle of. - ANSWER - the location on the belt that indicates the center of the force delivered by the belt. Which of the following relates to the calculation of a belt drive system's shaft speed and torque? - ANSWER: Shaft speeds are inversely related to pitch diameter. The belt span is defined as the. - ANSWER - the distance between the locations on the sheaves where the belt touches each one.

A belt drive system consists of three (3) components: the belt, the driving sheave, and the driven sheave. The fractional horsepower (FHP) V-belt, commonly known as a light duty belt, is intended for low-power applications requiring less than one horsepower. - ANSWER: 7.5 HP. The V-belt should ride in the groove, with its top at the top of the sheave; the V-belt should not come into contact with the of the sheave.

• ANSWER: high, bottom. To check for sheave groove wear, use a. - ANSWER: Sheave gauge One significant feature of a timing belt is that. - ANSWER: It will not slip during operation. The driven pulley in the belt drive system depicted rotates at RPM. - Answer: 1200 What gadget allows electrical circuits to regulate hydraulic or pneumatic systems? - ANSWER Directional control valve operated by solenoid. OR logic is represented by. - ANSWER: two typically open switches in parallel.

Which of the following logic parts describes two or more normally closed switches operating in parallel? - ANSWER: NAND Which sort of logic element use a relay? - Answer: Memory A power diagram, together with a ladder diagram, is required to demonstrate

. - ANSWER: appropriate connections for the power devices being used. Which of the following is not part of control logic? - ANSWER - NEXT Devices known as frequently function as an automated machine's brain. - ANSWER - Relays Which of the following depicts two or more typically closed switches connected in series? - ANSWER: NOR Which of the following is a rule for creating a ladder diagram? - ANSWER - Label each component.

• Number each rung.
• Only use one load per rung. **All of the above Which of the following is not part of a ladder diagram? - ANSWER: Valve

An electrical diagram that arranges a circuit's wires into order rows is known as a(n). - ANSWER: Ladder diagram NOT logic is created by. - ANSWER: One normally closed switch. Which of the following is not true about a ladder diagram? - ANSWER: Each rung can support more than one output device. Which of the following is an application for a relay? - ANSWER: Control logic, seal-in circuit, and energizing a fluid-power valve solenoid. Which of the following is not part of a relay? - ANSWER valve Is it typical industry practice to send the flow of power to a solenoid through? - ANSWER Relay contacts What is the term for turning outputs on and off using relay contacts? - ANSWER: Control logic What is one way to de-energize a seal-in circuit? - ANSWER: A stop push button

Which of the following sentences defines a limit switch? - ANSWER: It is a switch used to detect the position of a machine member.

• It is a basic, low-cost, and reliable device.
• It is the most commonly utilized input device on automatic machines. *****All of the above. The schematic symbol shown represents a limit - ANSWER N.C. What is a control circuit that uses limit switches to sequence a series of events called? - ANSWER Event Sequencing Circuit Which of the following is not part of a time-delay relay? - Answer the alarm. An on-delay timer relay's contacts will not change state until? - ANSWER: A certain time has passed. An off-delay timer contact? - ANSWER Energizes when the timer is engaged and de-energizes when the timer runs out.

Which of the following logic elements defines a circuit with two normally open switches in series: ANSWER AND