Machine Design MCQs

Question 1

If pump NPHS requirements are not satisfied

Accepted Answer

It will be cavitated

Answer

It will not develop head

Answer

Efficiency will be low

Answer

It will consume excessive power

Question 2

The abbreviation ERW in ERW pipe stands for

Accepted Answer

Electrically resistance welded

Answer

Elastic reinforced with wire

Answer

Extra reinforcement welded

Answer

Electrically reinforced and welded

Question 3

One otto is equal to

Accepted Answer

10^(-18)

Answer

10^(-15)

Answer

10^9

Answer

10^12

Question 4

Units of thermal conductivity are

Accepted Answer

W/m°K

Answer

Ns/m^2

Answer

J/kg°K

Answer

J/°K

Question 5

Units of entropy are

Accepted Answer

J/°K

Answer

Ns/m^2

Answer

W/m°K

Answer

J/kg°K

Question 6

Units of specific heat are

Accepted Answer

J/kg°K

Answer

Ns/m^2

Answer

W/m°K

Answer

J/°K

Question 7

Units of dynamic viscosity are

Accepted Answer

Ns/m^2

Answer

W/m°K

Answer

J/kg°K

Answer

J/°K

Question 8

Series wound D.C. motor

Accepted Answer

Should never be started without load on

Answer

Should always be started without load on

Answer

Whether load is connected or not is immaterial

Answer

Is started with average load

Question 9

In shunt wound D.C. motor

Accepted Answer

Speed is maximum at no load and drops by 10 to 12% at full load

Answer

Speed is infinity at low load and very less at high load

Answer

Speed remains constant at all the loads

Answer

Speed increases with increase in load