72) The condition of unstable equilibrium of a floating body is where, M = metacentre, B = centre of buoyancy, G = centre of gravity

M is above G

B is above G

B is below G

M is below G

Answer is:

M is below G

COP of refrigerator > 1 and COP of heat pump < 1

COP of refrigerator < 1 and COP of heat pump > 1

COP of refrigerator greater than equal to 1 and COP of heat pump lesser than or equal to 1

COP of refrigerator < or > 1 and COP of heat pump > 1

Answer is:

Increase bearing resistance

Increase compressive strength

Provide any friction properties

Increase wear resistance

Answer is:

"1/3" rd of reciprocating masses are balanced by rotating masses.

"1/2" nd of reciprocating masses are balanced by rotating masses.

None of the above

Answer is:

(N)/(N2-N1)

(N1-N2)/(N)

(N)/(N1-N2)

(N2-N1)/N

Answer is: