## Equation CP-Cv = R is

A.true for an ideal gas only
B.true for any real gas
C.true for ideal as well as real gases
D.not true for any gas

## Fire point of a given sample is

A.equal to the flash point
B.higher than the flash point
C.less than the flash point
D.equal to or less than the flash point

A.J/kg.K
B.J/kg
C.W/kg.K
D.J/m3.K

## Which of the following compounds is used in antiknock compositions to prevent the deposition of oxides of lead on spark plug combustion chamber and exhaust line?

A.Methyl tertiary butyl ether
B.Ethylene dibromide
C.Ethyl mercaptan
D.Armyl nitrate

## Which of the following is not an explosive?

A.Calcium ammonium nitrate
B.Nitroglycerine
C.Trinitrotoluene
D.Cellulose nitrate

## Carbon content of

A.steel is in between those of cast iron and wrought iron
B.cast iron is in between those of steel and wrought iron
C.pig iron is in between those of steel and wrought iron
D.wrought iron is in between those of steel and cast iron

A.P/?
B.P
C.? P/?
D.P/?

## The wagelength of X-rays is

A.6 to 100000 micron
B.0.4 to 0.8 micron
C.0.1 to 0.4 micron
D.0.014 to 0.018 micron
E.0.8 to 400 micron

A.25% N
B.35% N
C.46% N
D.82 % N

A.Argon
B.Carbon dioxide
C.Oxygen
D.Hydrogen