As the value of variance increases
A.uncertainty decreases
B.uncertainty increases
C.uncertainty remains unaffected
Category: Mechanical Engineering Mcqs
According to census the number of males per 1000 females in India is approximately
A.900
B.937
C.960
D.990
E.1050
The difference between wet and dry bulb temperatures
A.Increases at atmospheric temperature
B.Increases as air gets wet
C.Increases as air gets drier
D.remains constant always
E.None of the above
Entropy of mixing is always
A.Zero
B.positive
C.Negative
Which of the following is a sliding pair?
A.Bolt and nut
B.Ball and socket joint
C.Belt and pulley
D.Cross-head and guides
E.None of the above
Two 20 mm thick plates are to be gas welded. What size of welding rod should be selected out of the following rods available?
A.1.5 mm
B.3 mm
C.4.5 mm
D.6 mm
E.8 mm
As the temperature of a hot glowing object increases the wavelength at the maximum of the blackbody radiation curve
A.increases
B.decreases
C.remains the same
D.increases linearly
Which one is not an economic good
A.Poison
B.Water in desert
C.Sand in river bed
D.Sand in desert
E.Trees in forests
Which of the following is not an elecment of electro-pneumatic pressure transmitter?
A.LVDT
B.Bellows
C.Opamp
D.Flapper nozzle mechanism
E.All of the above
In a shell and tube heat exchanger the baffles are used
A.to provide mixing of the fluid
B.to deflect the flow in a particular direction
C.to reduce the fouling of the tube surface
D.to reduce the pressure drop
