A. Gamma rays
B. Microwaves
C. A beam of white light
D. A beam of coherent light
Related Mcqs:
- Name the safety device used to protect the boiler, when the water level falls below a minimum level ?
A. Blow down valve
B. Blow off cock
C. Fusible plug
D. Safety valve - _________________ property of a material is determined by the Herbert Pendulum device?
A. Hardness
B. Tensile
C. Toughness
D. Compressive - Upto the critical radius of insulation, added insulation, will____________________?
A. Increase the heat loss
B. Decrease heat loss and will have no effect beyond that
C. Decrease heat flux
D. Reduce convection heat loss compared to conduction heat less - The most suitable material of construction for a sewer to carry sewage under high pressure is________________________?
A. Asbestos cement
B. Steel
C. Cement concrete
D. Stoneware - ‘Cryogenics’ is concerned with the generation & use of low temperature in the range of____________________?
A. 0°K to 123°K
B. 0°C to – 123°C
C. 0°C to – 273°C
D. 0°K to 273°K - Coating thickness in case of galvanising of steel sheet generally corresponds to the deposition of _______________ gms of zinc per m2 of steel strip ?
A. 5-10
B. 1000-1500
C. 120-500
D. 1500-3000 - The boiling & freezing points on a newly defined temperature scale in degree ‘D’ are 400°D & 100°D respectively. The temperature reading corresponding to 60°C on this new temperature scale will be equal to _____________ °D ?
A. 140
B. 180
C. 240
D. 280 - Pick out the wrong statement?
A. Copper is the metal having the highest electronic conductivity
B. Hardenability & Weldability of metals are inversely related
C. Covalent bonding formed by sharing of electrons is present in all semi-conductor materials
D. Glass transition temperature applies to ‘polymers’ but not to ‘glasses’ - Silicon percentage in acid resistant cast iron is about ___________________?
A. 4
B. 8
C. 14
D. 20 - ‘Dikes’ are low height walls made around the storage vessels meant for storing hazardous & inflammable material (e.g., petroleum products). Volume of dikes is equal to (where, V = volume of the storage vessel) ?
A. V
B. V/2
C. 2V
D. 3V
