Pneumatic System Question & Answers August 28, 2022 By WatElectronics This article lists 50 Pneumatic System MCQs for engineering students. All the Pneumatic System Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of the Pneumatic System. The pneumatic system is simple in construction, the maintenance cost is less, and it is one type of open loop control system. The working fluid in the pneumatic system is air and the air is inflammable and compressible, hence air can be pressurized to lesser pressure. The pneumatic systems are less bulky and the accuracy of the system is not high when compared to the hydraulic system. The pneumatic system doesn't require any special attention and contamination control. The valve operations are easy in pneumatic systems and lighter in weight. The pneumatic systems are free from fire hazards and the compressors in the systems are used to provide compressed gases. The pneumatic systems are used to reduce labor costs, reduce machine investment costs, increase productivity, and reduce human efforts. The compressors, check valves, accumulators, directional valves, and actuators are the basic components of pneumatic systems. The compressors pressurize the air, the check valve prevents backflow into the compressor, the accumulator smooths air flow and unwanted disturbances, directional valves stores energy and reduce turbulence, and the actuator transfers air energy into motion exam air chisel. 1). Which one of the following systems is an open loop system? Hydraulic system Pneumatic system Both a and b None of the above None Hint 2). Which one of the following is used in pneumatic systems? Compressors Pumps Both a and b None of the above None Hint 3). Which one of the following systems is free from fire hazards? Hydraulic system Pneumatic system Both a and b None of the above None Hint 4). Which one of the following is used in pneumatic system? Air Fluid Both a and b None of the above None Hint 5). In which one of the following, the maintenance is easier and quicker? Hydraulic system Pneumatic system Both a and b None of the above None Hint 6). Which one of the following is a energy transfer element of electrical power system? High pressure air High pressure liquid Electrical motor None of the above None Hint 7). Which one of the following is a basic component of pneumatic power system? Air tank Compressor Valves All of the above None Hint 8). Which one of the following components is used to store certain volume of compressed air? Air tank Compressor Valves All of the above None Hint 9). Which one of the following components is used to carry the pressured air from one to another location? Piping Compressor Valves All of the above None Hint 10). Which one of the following systems employs a compressed gas usually air as a fluid? Hydraulic system Pneumatic system Both a and b None of the above None Hint 11). The pneumatic conveying is categorised into ___________________ types? One Two Three Four None Hint 12). Which one of the following is also called a throttling controller? Intermittent pneumatic controller Continuous bleed pneumatic controller Both a and b None of the above None Hint 13). What are the advantages of pneumatic controller? Easy maintainability Low cost of installation Good reliability All of the above None Hint 14). Which one of the following valves is a type of valve according to type of construction? Manual actuation Poppet valve Mechanical actuation All of the above None Hint 15). Which one of the following is a part of pneumatic timer? One way flow control valve Accumulator/air reservoir 3/2 way pneumatically operated directional control valve All of the above None Hint Pneumatic System MCQs for Exams 16). The pressure regulators are categorised into ________________ types? One Two Three Four None Hint 17). The ratio of isothermal work divided by actual work is known as _______________ efficiency? Isothermal Volumetric Polytropic None of the above None Hint 18). Which one of the following compressors is a type of turbo compressor? Centrifugal Piston Twin screw All of the above None Hint 19). In which one of the system the pressure relief value is not necessary? Hydraulic system Pneumatic system Both a and b None of the above None Hint 20). In which one of the following the gases are easily compressed? Hydraulic system Pneumatic system Both a and b None of the above None Hint 21). Which one of the following components is used to control air direction, flow rate, and pressure? Air tank Compressor Valves All of the above None Hint 22). The reciprocating type of compressors are categorised into _________________ types? One Two Three Four None Hint 23). Which one of the following actuators converts pneumatic energy into linear motion? Rotary actuator Linear actuator Both a and b None of the above None Hint 24). Which one of the following is not suitable for long strokes? Pneumatic circuits Hydraulic circuits Both a and b None of the above None Hint 25). Which one of the following requires very low operating cost? Pneumatic circuits Hydraulic circuits Both a and b None of the above None Hint 26). Which one of the following system rigidities is good? Pneumatic circuits Hydraulic circuits Both a and b None of the above None Hint 27). Which one of the following circuit operations is noisy? Pneumatic circuits Hydraulic circuits Both a and b None of the above None Hint 28). Which one of the following compressors is not a type of turbo compressor? Centrifugal Axial flow Twin screw All of the above None Hint 29). In which one of the system the return lines are not necessary? Hydraulic system Pneumatic system Both a and b None of the above None Hint 30). How many types of pneumatic valves are there? One Two Three Four None Hint Pneumatic System MCQs for Quiz 31). Which one of the following is a energy transfer element of hydraulic system? High pressure air High pressure liquid Electrical motor None of the above None Hint 32). Which one of the following components is used to compress the air which is coming from atmosphere? Air tank Compressor Valves All of the above None Hint 33). The diaphragm type regulators are categorised into ________________ types? One Two Three Four None Hint 34). Which one of the following compressors is not a type of rotary type compressor? Labyrinth Lobe type Twin screw All of the above None Hint 35). The rotary type of compressors is categorised into _________________ types? One Two Three Four None Hint 36). Which one of the following actuators converts pneumatic energy into rotary motion? Rotary actuator Linear actuator Both a and b None of the above None Hint 37). The figure shown below is a block diagram of ________________ system? Electromagnetic Pneumatic Hydraulic None of the above None Hint 38). Which one of the following components in hydraulic system holds hydraulic oil? Pump Tank Actuator All of the above None Hint 39). Which one of the following compressors is not a type of reciprocating type compressor? Labyrinth Axial flow Piston All of the above None Hint 40). Which one of the following systems is easy to operate valves? Hydraulic system Pneumatic system Both a and b None of the above None Hint 41). In how many methods we can transmit the power? One Two Three Four None Hint 42). Which one of the following is a energy transfer element of pneumatic system? High pressure air High pressure liquid Electrical motor None of the above None Hint 43). Which one of the following components is used to drive the compressors? Air tank Compressor Electric motor All of the above None Hint Read more about Electric Motors None 44). Which one of the following compressors is a type of rotary type compressor? Labyrinth Diaphragm Twin screw All of the above None Hint 45). What is the standard form of DCV? Direct Control Valve Diffusion Control Valve Differential Control Valve None of the above None Hint 46). The pneumatic cylinders are categorised into __________________ types? One Two Three Four None Hint 47). Which one of the following pneumatic cylinders operates on single end of the piston? Single acting Double acting Telescoping All of the above None Hint 48). The figure shown below is a block diagram of ________________ system? Electromagnetic Pneumatic Hydraulic None of the above None Hint 49). Which one of the following compressors is a type of reciprocating type compressor? Labyrinth Diaphragm Piston All of the above None Hint 50). What are the advantages of pneumatic systems? High effectiveness High durability Simple design All of the above None Hint Please fill in the comment box below. Time's up
