A. Gamma rays
B. X-rays
C. Microwaves
D. Gas welding
Related Mcqs:
- ____________________ joint is mostly used for joining pipes carrying water at low pressure ?
A. Nipple
B. Socket
C. Union
D. Bell and spigot - The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible _____________ process?
A. Isobaric
B. Isothermal
C. Adiabatic
D. None of these - Lap joints are preferred over butt joints in soldering/brazing, because these joints are _________________?
A. Weaker in tension but stronger in shear
B. Weaker in shear but stronger in tension
C. Stronger in both shear and tension
D. The lap joints are easily made - _____________________ remains constant during the adiabatic cooling of moist air?
A. Wet bulb temperature
B. Dry bulb temperature
C. Relative humidity
D. Specific humidity - 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 - For organic compounds, group contribution method can be used for the estimation of _____________________?
A. Critical properties
B. Specific gravity
C. Specific volume
D. Thermal conductivity - Any substance above its critical temperature exists as _____________________?
A. Saturated vapour
B. Solid
C. Gas
D. Liquid - Isentropic process means a constant _____________________ process ?
A. Enthalpy
B. Pressure
C. Entropy
D. None of these - With increase in temperature, the surface tension of water _____________________?
A. Increases
B. Decreases
C. Remain constant
D. Increases linearly - With increase in the solute concentration, the specific heat of aqueous solutions _____________________?
A. Increases
B. Decreases
C. Remains unchanged
D. Either A. or B.; depends on the type of solution
