Chemical Engineering Basics

511. Regeneration of molecular sieve requires it to be heated to a temperature of about __________ °C.

1. 80-120
2. 200-300
3. 600-800
4. 1000-1100

View answer

512. Removal of non-condensable from steam or other vapour is termed as the __________ process.

1. Condensation
2. Deaeration
3. Scavenging
4. Exhaust

View answer

513. Resilience of a bolt can be increased by increasing its

1. Length
2. Shank diameter
3. Head diameter
4. None of these

View answer

514. Resistance of an electrical conductor is proportional to its (where, l = length and A = crosssectional area of the conductor)

1. A
2. l
3. A2
4. Both 'a' & 'b'

View answer

515. Reynolds number of a fluid flowing in a circular pipe is 10,000. What will be the Reynolds number when the fluid velocity is decreased by 30% & the pipe diameter is increased by 30%?

1. 9100
2. 13000
3. 7000
4. 2550

View answer

516. Routing in production, planning & control is concerned with the

1. Sequence of operation to be performed
2. Progress of work performed
3. Authorisation of work to be performed
4. Balancing of load on machines

View answer

517. Runge-Kutta method is used to solve a/an

1. Ordinary differential equation of nth order
2. Simultaneous non-linear equation
3. Linear differential equation
4. None of these

View answer

518. Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode

1. Occurs higher in the electro-chemical series of metals
2. Is exemplified by magnesium plate
3. Is much cheaper than the cathodic base material to be guarded against corrosion
4. All (A), (B) & (C)

View answer

519. Sand used to stop the green sand from sticking to the pattern is termed as the __________ sand.

1. Parting
2. Synthetic
3. Loam
4. Dry

View answer

520. Satellites burn off during re-entry to earth's atmosphere, because of the

1. Combustion with air
2. Gravitational pull by earth
3. Friction with earth's atmosphere
4. Loss in weight of the satellite

View answer