Questions and answers for exam Preparation

MCQs

Total Questions : 1628 | Page 157 of 163 pages

Question 1561. The ratio of shear stress to shear strain is called

Shear modulus
Modulus of rigidity
Modulus of elasticity
Bulk modulus

Discuss Question

Answer: Option A. -> Shear modulus

Question 1562. With increase in temperature drop (in a shell and tube heat exchanger), the LMTD correction factor, FT

Increases very rapidly
Increases linearly
Decreases very rapidly
Remains constant

Discuss Question

Answer: Option C. -> Decreases very rapidly

Question 1563. In hydrostatic testing of welded pipe (for leakage, strength etc.) the ratio of minimum hydrostatic test pressure to internal design pressure is around

Discuss Question

Answer: Option A. -> 1.5

Question 1564. For a 25 mm hole drilled in plates to be rivetted, the shank diameter of the rivet should be __________ mm.

Discuss Question

Answer: Option B. -> 23

Question 1565. Tube side heat transfer co-efficient for turbulent flow of liquid through tubes is proportional to

G0.5
G0.2
G1.5
G0.8

Discuss Question

Answer: Option D. -> G0.8

Question 1566. 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?

Sensible heat changes for vapour & liquid are negligibly small
Reflux is not a saturated liquid
Heat of mixing of normal liquid is assumed to be zero
Molar latent heat of the two components are equal

Discuss Question

Answer: Option B. -> Reflux is not a saturated liquid

Question 1567. Seamless pipe is made

From rolled strips formed into cylinders and seam-welded
Both B and C
By forging a solid round, piercing it by simultaneously rotating & forcing it over a piercer point and further reducing it by rolling gas drawing
By extrusion & casting into static and centrifugal molds

Discuss Question

Answer: Option B. -> Both B and C

Question 1568. Most of the storage vessels/tanks are made cylindrical, because of the fact that a cylinder

Is easy to fabricate
Both A & B
Has greater structural strength
Neither A nor B

Discuss Question

Answer: Option B. -> Both A & B

Question 1569. Pressure drop due to pipe fittings can be estimated by the equation, ΔP/p = 4f.Le/D.V2/2gc, where, Le = equivalent length of straight pipeline which will incur the same frictional loss as the fitting and D = diameter of the fitting. The value of Le/D (dimensionless) for 45° elbow and 180° close return bends would be respectively around

45 and 75
5 and 10
300 and 500
180 and 300

Discuss Question

Answer: Option A. -> 45 and 75

Question 1570. 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.