Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering Page-8 section-6

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71.
Presence of sulphur in steel reduces the

A. Hardness

B. Grain size

C. Tensile strength

D. Toughness & transverse ductility

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72.
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

A. Reynolds number (based on sphere diameter) should be < 1

B. Flow around the sphere should be in turbulent region

C. Sphere must be metallic

D. Fluid density should be constant

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73.
'Ice point' is designated on Farenhite temperature scale by

A. 0°

B. 32°

C. 62°

D. 212°

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74.
Safety matches is produced using

A. Red phosphorus

B. Yellow phosphorus

C. Black phosphorus

D. Elemental sulphur

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75.
A thin, flat & square plate measuring 2 m × 2 m is freely hanging in ambient air at 25°C. It is exposed to the solar radiation falling on one side of the plate at the rate of 500 W/m². The plate temperature will remain constant at 30°C, if the convective heat transfer co-efficient is __________ W/m² °C.

A. 50

B. 100

C. 150

D. 200

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76.
Material having negative co-efficient of linear expansion is

A. Copper

B. Aluminium

C. Rubber

D. Nickel

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77.
Fine grained steels have

A. High brittleness

B. Higher tendency to distort

C. High ductility

D. None of these

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78.
Floating control action

A. Moves the final control element at constant speed in either direction in response to an error signal

B. Changes the position of the final control element from on to off

C. Is used to counteract rapid load changes

D. None of these

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79.
Styrofoam is the commercial name of

A. Polyurathene

B. Polystyrene

C. Polyacrylonitrile

D. Polybutadiene

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80.
Which of the following is an inedible oil ?

A. Corn oil

B. Tallow oil

C. Olive oil

D. Cotton seed oil

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Chemical Engineering Basics MCQ Questions & Answers | Chemical Engineering

71. Presence of sulphur in steel reduces the

Answer & Solution

72. For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

Answer & Solution

73. 'Ice point' is designated on Farenhite temperature scale by

Answer & Solution

74. Safety matches is produced using

Answer & Solution

Answer & Solution

76. Material having negative co-efficient of linear expansion is

Answer & Solution

77. Fine grained steels have

Answer & Solution

78. Floating control action

Answer & Solution

79. Styrofoam is the commercial name of

Answer & Solution

80. Which of the following is an inedible oil ?

Answer & Solution

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71.
Presence of sulphur in steel reduces the

72.
For the Stoke's law to be valid in the case of a falling sphere in a fluid, the

73.
'Ice point' is designated on Farenhite temperature scale by

74.
Safety matches is produced using

76.
Material having negative co-efficient of linear expansion is

77.
Fine grained steels have

78.
Floating control action

79.
Styrofoam is the commercial name of

80.
Which of the following is an inedible oil ?