A. Cyaniding
B. Sherardizing
C. Spheroidising
D. None of these
Related Mcqs:
- The accumulation in a steady state combustion process, burning 1 kg mole of carbon with 1 kg mole of oxygen thereby producing 1 kg mole of carbon dioxide, is _____________ kg mole?
A. 1
B. 0
C. 16
D. 44 - The combustion equations of carbon and carbon monoxide are as follows: C + O2 = CO2, ΔH = – 394 kJ/kg .mole CO + ½ O2 = CO2, ΔH = – 284.5 kJ/kg. mole. The heat of formation of CO is _____________ kJ/kg. mole?
A. -109.5
B. +109.5
C. +180
D. +100 - Secondary hardening in steels arises out of the _____________________?
A. Precipitation of fine alloy carbides at high temperatures
B. Refinement of ferrite grain size by working
C. Decomposition of retained austenite upon heat treatment
D. Precipitation of complex inter-metallic upon heat treatment - In case of a reversible process (following pvn = constant), work obtained for trebling the volume (v1 = 1 m3 and v23 m3) is maximum, when the value of ‘n’ is_________________?
A. 0
B. 1
C. y = 1.44
D. 1.66 - Which of the following is the most suitable material of construction for the condenser tubes, where the cooling medium is brine (salty water) ?
A. Aluminium
B. Copper
C. Titanium
D. Stainless steel - The value of Joule-Thomson co-efficient, in case where cooling occurs after the throttling process is________________?
A. 0
B. ∞
C. +ve
D. -ve - In case of an _______________ process, the temperature of the system increases?
A. Isothermal compression
B. Isothermal expansion
C. Adiabatic expansion
D. Adiabatic compression - In case of steady flow compression polytropic process (PVn = constant), the work done on air is the lowest, when_______________?
A. n = y = 1.4
B. n = 0
C. n = 1
D. n = 1.66 - Internal energy is equal to the heat absorbed in case of a/an ______________ process?
A. Constant volume
B. Polytropic
C. Adiabatic
D. Constant pressure - Entropy change in case of reversible adiabatic process is________________?
A. Minimum
B. Zero
C. Maximum
D. Indeterminate
