Building Material (Part-II) (GENERAL ENGINEERING) (SSC JE)

Total Questions: 50

1. The standard size of an ordinary brick is [BPSC AE (GEN. ENGG.)-1995]

Correct Answer: (c) 19 cm × 9 cm × 9 cm
Solution:

2. The initial setting time of quick-setting cement is [BPSC AE (GEN. ENGG.)-1995]

Correct Answer: (b) 5 minutes
Solution:Quick setting cement–The setting action starts within 5 minutes and final setting is over in 30 minutes.

Low heat portland cement– The initial setting time for this cement is about one hour and the final setting time is about 10 hours.

3. Wood work should be painted to [BPSC AE (GEN. ENGG.)-1995]

Correct Answer: (c) both the above
Solution:Wood work should be painted to prevent against weathering effect, impart better appearance more durable and prevent fungus attack.

4. What type of glass should generally be used in bathrooms? [BPSC AE (GEN. ENGG.)-1995 ]

Correct Answer: (a) ground glass
Solution:Ground glass– In this type of glass one face of plate or sheet glass is made rough by grinding.

• It is used for maintaining privacy by obstructing vision and at the same time allowing light. • The ground glass is used for bedrooms, toilets and for making black boards.

5. Which of the following statements is NOT correct with respect to properties of building stones? [NHPC JE (EE) 05.04.2022 (Shift-II)]

Correct Answer: (a) Fine grained stones with homogeneous distribution look attractive, and hence they are used for carving.
Solution: The properties of building stones–

1. Strength, the strength of the stone must be able to resist the applying load or overcoming load.

2. Durability, stone must stay in all climatic conditions and resist all the natural destructive effects it fasts for a long time.

3. Hardness and toughness, it should be enough strong and hard to withstand all the stresses applied due to seismic forces, wind loads and a load of the super structure.

4. Property of absorption and porosity, stones should not be porous and not allow rain water or any type of acidic water to pass through it.

It is impermeable to any type of liquid also, the stone must not show any absorption characteristics for liquid.

6. Which of the following types of rocks exhibits greatest crushing strength when compared to the other mentioned type of rocks ? [NHPC JE (Civil) 04.04.2022 (Shift-II) ]

Correct Answer: (d) Trap
Solution:
Types of StoneCrushing Strength (kg/cm²)
Sand stone650
Laterite18 – 32
Lime stone550
Basalt and trap1530 – 1890

7. Which of the following types of rock exhibits less crushing strength when compared to other mentioned type of rocks ? [NHPC JE (Civil) 04.04.2022 (Shift-I)]

Correct Answer: (a) Laterite
Solution:• Laterite rock exhibits less crushing strength 18-32 kg/cm² .
Types of StoneCrushing Strength (kg/cm²)
Sand stone650
Laterite18 – 32
Lime stone550
Basalt and trap1530 – 1890

8. Which of the following is NOT a durability test conducted on building stones? [NHPC JE (EE) 05.04.2022 (Shift-I)]

Correct Answer: (a) Moh's scale test
Solution:A durability test conducted on building stones are followings–
TestPurpose
Smith testFor presence of soluble matter
Brard’s testFor frost resistance
Acid testTo check whether resistance

• Hardness of stone is determined by Moh's scale test.

9. Galvanized iron is coated with ____________. [IREL Diploma Trainee-11.09.2022]

Correct Answer: (b) Zinc
Solution:Galvanized iron is coated with zinc in order to protect the iron from rusting. The process of applying layer of zinc to iron is called as galvanization.

10. Which one of the following metals is corrosionresistant? [IREL Diploma Trainee-11.09.2022]

Correct Answer: (b) Tin
Solution:Tin is corrosion resistant metal among the given option chromium, iridium, stainless steel etc. are non-corrosive metals and alloys.