Quiz: Civil Engineering
Topic: Building Construction Technology
Each question carries 1 mark
Negative marking: 1/4 mark
Time: 10 Minutes
Q1. The distemper is used to coat:
(a) External concrete surface
(b) interior surface not exposed to weather
(d) Compound walls
Q2. The most commonly used base for timber painting is
(a) Red lead
(b) Zinc white
(c) White lead
(d) Titanium white
Q3. The ingredient of paint which are used to hide the surface irregularities and imparts color is known as__________.
Q4. The ultimate tensile strength of the structural mild steel is:
(a) 160 N/mm²
(b) 260 N/mm²
(c) 420 N/mm²
(d) 520 N/mm²
Q5. The small area on painted surface enclosed by hair line cracks are known as:
Q6. Bakelite is a/an
(c) high resistance conductor
(d) Low resistance conductor
Q7. For manufacturing colored glass, the coloring pigments are added in the glass at the stage of
(a) Raw material mixing
Q8. Which of the following quality of timber can improved using Abel’s process?
(b) Fire Resistance
(c) chemical resistance
Q9. The defect in timber that causes longitudinal separation of woods between the annular rings is known as___________.
(b) Rind gall
(d) Twisted fibers
Q10. In which of the following direction the strength of timber is maximum?
(a) Parallel to grains
(b) 45° to grains
(c) Perpendicular to grains
(d) Same in all directions
Sol. Distemper is used to coat interior surface not exposed to weather. It is made with base as white chalk and thinner as water.
Sol. White lead is used as base for timber painting.
Sol. Pigments is used to hide the surface irregularities and imparts desired color to paints.
Sol. Wrinkling These are the hair line cracks on small area of painted surface.
Sol. Bakelite is a type of plastic which is used as non-conductive material.
Sol. Color pigment is added in the manufacturing of glass at the stage of fusion.
Sol. Timber surface is coated with solution of sodium silicate which increase the resistance against fire. This process is called sir Abel’s process.
Sol. Shakes It is longitudinal cracks which partially or completely separates the fibers.
(a) Heart shakes cracks run from pith to sapwood.
(b) Cup shakes Appears as partly or completely separates annual rings from one another.
(c) Ring shakes Appears as completely separates annual rings.
(d) Star shakes cracks run from bark to sap wood.
Sol. if applied load is parallel to grains then the strength of timber is maximum.