MECHANICAL ENGINEERING INTERVIEW QUESTIONS
1.)What is enthalpy?
Ans:-Enthalpy is the heat content of a chemical system.
Ans:-Enthalpy is the heat content of a chemical system.
2.) What is a positive displacement pump?
Ans:-A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positive
displacement pumps can be further classified as either rotarytype (for example the rotary vane)or lobe pumps similar to oil pumps used in car engines. These pumps give a nonpulsating output or displacement unlike the reciprocating pumps. Hence, they are called positive displacement pumps.
Ans:-A positive displacement pump causes a liquid or gas to move by trapping a fixed amount of fluid or gas and then forcing (displacing) that trapped volume into the discharge pipe. Positive
displacement pumps can be further classified as either rotarytype (for example the rotary vane)or lobe pumps similar to oil pumps used in car engines. These pumps give a nonpulsating output or displacement unlike the reciprocating pumps. Hence, they are called positive displacement pumps.
3.) Why would you use hydraulics rather than pneumatics?
Ans:-Hydraulics is suitable for higher forces & precise motion than pneumatics. This is because hydraulic systems generally run at significantly higher pressures than pneumatics systems.Movements are more precise (repeatable) because hydraulics uses an incompressible liquid to transfer power whilst pneumatics uses gases.Pneumatic systems have some advantages too. They are usually significantly cheaper than hydraulic systems, can move faster (gas much less viscous than oil) and do not leak oil if they
develop a leak.
Ans:-Hydraulics is suitable for higher forces & precise motion than pneumatics. This is because hydraulic systems generally run at significantly higher pressures than pneumatics systems.Movements are more precise (repeatable) because hydraulics uses an incompressible liquid to transfer power whilst pneumatics uses gases.Pneumatic systems have some advantages too. They are usually significantly cheaper than hydraulic systems, can move faster (gas much less viscous than oil) and do not leak oil if they
develop a leak.
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