A. Iron
B. Copper
C. Rubber
D. Nickel
Related Mcqs:
- Metallic surveying tapes are made of _____________ which has a low co-efficient of expansion & enough strength ?
A. Invar
B. Hastelloy
C. Duralumin
D. Monel metal - Working of linear variable differential transducer (LVDT) is based on the principle of variable_____________________?
A. Capacitance
B. Resistance
C. Mutual inductance
D. None of these - In a totally irreversible isothermal expansion process for an ideal gas, ΔE = 0, ΔH = 0. Then ΔQ and ΔS will be_______________?
A. ΔQ = 0, ΔS=0
B. ΔQ = 0, ΔS = +ve
C. ΔQ = 0, ΔS = -ve
D. ΔQ = +ve, ΔS= +ve - In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?
A. V2
B. 1/V2
C. 1/Vg
D. Vg - Co-efficient of performance of a Carnot cycle refrigerator operating between – 23°C and + 27°C is ________________?
A. 3
B. 5
C. 0.5
D. 1.5 - Air standard Otto cycle is more efficient than the diesel cycle for the same__________________?
A. Heat addition & compression ratio
B. Heat addition & pressure
C. Compression ratio & pressure
D. Cylinder dimension & rpm - What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m2. °K? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively ?
A. 2
B. 8
C. 10
D. 40 - The activity co-efficient of the solute in a dilute solution ?
A. Decreases with the increase of concentration of the solute
B. Increases with the increase of concentration of the solute
C. Remains constant
D. Is unity at infinite dilution - Joule-Thomson co-efficient is the ratio of________________?
A. Pressure change to temperature change occuring during adiabatic compression of a gas
B. Pressure change to temperature change occuring during adiabatic throttling of a gas
C. Temperature change to pressure change occuring during adiabatic compression of a gas
D. Temperature change to pressure change occuring during adiabatic throttling of a gas - The efficiency of a Carnot heat engine operating between absolute temperatures T1 and T2 (when, T1 > T2) is given by (T1 – T2)/T1. The co-efficient of performance (CO.P.) of a Carnot heat pump operating between T1 and T2 is given by_________________?
A. T1/(T1-T2)
B. T2/(T1-T2)
C. T1/T2
D. T2/T1
