ENGINEERING ECONOMICS QUIZ

Angled baffles are preferred in the agitation tank to control the swirling action; if the viscosity of the liquid to be mixed is about 200 poise. However, the baffle may be completely eliminated for mixing liquids having viscoisty above __________ poise.

600

300

1500

1000

TRUE ANSWER : ?
YOUR ANSWER : ?

The ratio of linear stress to linear strain is termed as the

Modulus of rigidity

Bulk modulus

None of these

Modulus of elasticity

TRUE ANSWER : ?
YOUR ANSWER : ?

In a shell and tube heat exchanger, the 'tube pitch' is defined as the

O.D. of the tube for square pitch

Shortest distance between two adj acent tube holes

None of these

Shortest centre to centre distance between adjacent tubes

TRUE ANSWER : ?
YOUR ANSWER : ?

Practical dividing line between a ductile and brittle materials is suggested, when the ultimate elongation is about 5%. Generally, larger the knuckle radius, stronger is the corner torus section of a head. The knuckle radius provided should be less than __________ of the head.

3 times the thickness

Either A or B, whichever is smaller

6% of I.D.

Either A or B, whichever is larger

TRUE ANSWER : ?
YOUR ANSWER : ?

To avoid the tearing off the plate of an edge, the margin (i.e., the minimum distance from the centre of the rivet hole to the nearest edge of the plate) should be equal to

0.5 d

D

1.5 d

2.5 d

TRUE ANSWER : ?
YOUR ANSWER : ?

25 per cent cut segmental baffle means that the baffle

Height is 25% of the I.D. of the shell

Spacing is 75% of its height

Width is 25% of its height

Height is 75% of the I.D. of the shell

TRUE ANSWER : ?
YOUR ANSWER : ?

In inclined long tube vertical evaporators, the tubes are inclined at an angle of

90°

45°

60°

15°

TRUE ANSWER : ?
YOUR ANSWER : ?

__________ shaped roof is most commonly used for cylindrical tanks.

Flat

Dome

Cone

Umbrella

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following is not a valid assumption in continuous binary distillation for calculating the number of equilibrium stages by Mc-Cabe-Thiele's method?

Heat of mixing of normal liquid is assumed to be zero

Sensible heat changes for vapour & liquid are negligibly small

Molar latent heat of the two components are equal

Reflux is not a saturated liquid

TRUE ANSWER : ?
YOUR ANSWER : ?

A rivetted joint does not fail by __________ of rivets.

Tearing

None of these

Shearing

Tearing of the plate across a row

TRUE ANSWER : ?
YOUR ANSWER : ?