chemical engineering MCQs – Page 340

Practise multiple-choice questions from chemical engineering for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

chemical engineering Mcqs

6781. Slow plastic deformation of metals under a constant stress is termed as _____________ failure?
0

A. Creep

B. None of these

C. Endurance

D. Fatigue

6782. Cast iron is having very high ___________________?
0

A. Ductility

B. All A., B. and C.

C. Proximity between its elastic limit and ultimate breaking strength

D. Tensile strength

6783. A refrigerator works on the principle of _____________ law of thermodynamics?
0

A. Second

B. First

C. Third

D. Zeroth

6784. Which of the following is a low melting point metal ?
0

A. Stainless steel

B. Copper

C. Tin

D. Wrought iron

6785. Which of the following material of construction may be recommended by a chemical engineer for handling a gaseous chlorine (dry or wet) stream in a fluid flow system ?
0

A. Mild steel and stainless steel

B. High silicon iron, silicon rubber, Kel-F and Teflon

C. Cast iron, tin and aluminium

D. Copper, nickel and Monel

6786. Ball bearings are normally made of _____________ steel?
0

A. High speed

B. High carbon

C. Chrome

D. Silicon

6787. Maintenance cost of a ______________ pump for a particular duty is the least?
0

A. Gear

B. Volute

C. Reciprocating

D. Centrifugal

6788. The increase in hardness of metal due to its cold working is termed as the _______________ hardening?
0

A. Induction

B. Flame

C. Work

D. Age

6789. For liquid flow through a packed bed, the superficial velocity as compared to average velocity through the channel in the bed is________________?
0

A. Independent of porosity

B. Equal

C. Less

D. More

6790. Sulphuric acid is mixed with ground phosphate rock (to produce phosphoric acid) in a steel digestor lined with______________?
0

A. Karbate

B. Rubber

C. Acidic refractory

D. Lead or acid proof bricks

6791. Reduction in the grain size reduces the _______________ of the material?
0

A. Tensile strength

B. Creep resistance

C. All A., B. & C.

D. Fatigue resistance

6792. A hydraulic ram acts as a/an ______________ pump?
0

A. Reciprocating

B. Centrifugal

C. Parallel cylinder

D. Impulse

6793. The high expansion metal normally used in the bimetallic thermometer is _______________ temperature measurement?
0

A. Brass for low

B. Nickel alloys for high

C. Both A. & B.

D. Aluminium for all

6794. Mixing vessel used for the chlorination of methane to produce methyl chloride is made of___________________?
0

A. Aluminium

B. High carbon steel

C. Copper

D. Cast iron

6795. With a constant diameter impeller of a centrifugal pump _____________________?
0

A. Head varies as the square of speed

B. Head varies as the speed

C. Horsepower input varies as the square of speed

D. Its capacity varies directly as the square of speed

6796. Gibbs free energy (G) is represented by, G = H TS, whereas Helmholtz free energy, A. is given by, A = E TS. Which of the following is the Gibbs-Helmholtz equation ?
0

A. [?(G/T)/?T] = (H/T2)

B. [?(A/T)/?T]V = E/T2

C. Both A. and B.

D. Neither A. nor B.

6797. The nominal size of a hose pipe is specified by its _________________?
0

A. Thickness

B. I.D.

C. O.D.

D. None of these

6798. Amount of energy that a material can absorb before its fracture is a measure of its _________________?
0

A. Toughness

B. Malleability

C. Ductility

D. Resilience

6799. One dimensional fluid flow implies the ________________________?
0

A. Uniform flow

B. Flow in straight lines only

C. Steady uniform flow

D. Flow in which transverse components are zero

6800. High speed cutting tool steels contain about _______________ percent of tungsten?
0

A. 50-55

B. 30-35

C. 18-20

D. 8-Jun

Previous Next

Showing 6781 to 6800 of 8709 mcqs