# Construction & Building Materials Mcqs

Q:

A) Per sqm | B) Per cum |

C) Quintal | D) Kilograms |

Answer & Explanation
Answer: B) Per cum

Explanation: The unit of payment of cement concrete in lintels is per cum. The unit of payment of R.C.C. in the slab is also per cum. Here, per cum stands for per cubic metre.

Explanation: The unit of payment of cement concrete in lintels is per cum. The unit of payment of R.C.C. in the slab is also per cum. Here, per cum stands for per cubic metre.

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Q:

A) 24.6 | B) 38.9 |

C) 56.7 | D) 93.8 |

Answer & Explanation
Answer: D) 93.8

Explanation: The quantity of cement required is [1/(1+2+4)] x 1.52 x 15 m³ i.e. 3.257 m³. SP weight of concrete is 1440 kg/m³ and the weight of one cement bag is 50 kg. Therefore, the number of cement bags required for RCC (1:2:4) for 15 m³ of work is 3.257 x 1440/50 = 93.8 bags.

Explanation: The quantity of cement required is [1/(1+2+4)] x 1.52 x 15 m³ i.e. 3.257 m³. SP weight of concrete is 1440 kg/m³ and the weight of one cement bag is 50 kg. Therefore, the number of cement bags required for RCC (1:2:4) for 15 m³ of work is 3.257 x 1440/50 = 93.8 bags.

90

Q:

A) 18.24 m³ | B) 15.23 m³ |

C) 24.87 m³ | D) 32.45 m³ |

Answer & Explanation
Answer: A) 18.24 m³

Explanation: The ratio 1:3:6 is for cement, sand and coarse aggregate. Therefore, the quantity of coarse aggregate required for RCC (1:3:6) for 20 cubic metres of work is [6/(1+3+6)] x 1.52 x 20 m³ i.e. 18.24 m³.

Explanation: The ratio 1:3:6 is for cement, sand and coarse aggregate. Therefore, the quantity of coarse aggregate required for RCC (1:3:6) for 20 cubic metres of work is [6/(1+3+6)] x 1.52 x 20 m³ i.e. 18.24 m³.

40

Q:

A) 4.76 m³ | B) 10.32 m³ |

C) 8.43 m³ | D) 6.51 m³ |

Answer & Explanation
Answer: D) 6.51 m³

Explanation: Approximately 1.52 m³ of dry concrete is required for 1 m³ of wet concrete. The quantity of sand required for RCC (1:2:4) for 15 cubic metres of work is [2/(1+2+4)] x 1.52 x 15 m³ i.e. 6.51 m³.

Explanation: Approximately 1.52 m³ of dry concrete is required for 1 m³ of wet concrete. The quantity of sand required for RCC (1:2:4) for 15 cubic metres of work is [2/(1+2+4)] x 1.52 x 15 m³ i.e. 6.51 m³.

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Q:

A) 50 | B) 100 |

C) 500 | D) 200 |

Answer & Explanation
Answer: A) 50

Explanation: The weight of one cement bag is 50 kg. Therefore, the number of cement bags required for 2500 kg of cement is 2500/50 i.e. 50 bags.

Explanation: The weight of one cement bag is 50 kg. Therefore, the number of cement bags required for 2500 kg of cement is 2500/50 i.e. 50 bags.

30

Q:

A) Executive Board | B) SDO |

C) Elective Board | D) Board of Chief Engineers |

Answer & Explanation
Answer: D) Board of Chief Engineers

Explanation: The Board of Chief Engineers approves the rates of materials used for government works. However, every year, these are fixed by the Superintendent Engineer.

Explanation: The Board of Chief Engineers approves the rates of materials used for government works. However, every year, these are fixed by the Superintendent Engineer.

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Q:

A) Earthwork excavations, cement concrete for the base course (1:4:8) and cement concrete for wearing course (1:2:8) | B) Earthwork excavations, cement concrete for wearing course (1:4:8) and cement concrete for the base course (1:2:8) |

C) Earthwork excavations, cement concrete for the base course (1:6:9) and cement concrete for wearing course (1:7:9) | D) Cement concrete for the base course (1:2:3), cement concrete for wearing course (2:7:9) and earthwork excavations |

Answer & Explanation
Answer: A) Earthwork excavations, cement concrete for the base course (1:4:8) and cement concrete for wearing course (1:2:8)

Explanation: The correct order of stages of estimation of concrete roads is earth work excavations, cement concrete for the base course (1:4:8) and cement concrete for wearing course (1:2:8). Cement concrete road is laid over an existing Water Bound Macadam road.

Explanation: The correct order of stages of estimation of concrete roads is earth work excavations, cement concrete for the base course (1:4:8) and cement concrete for wearing course (1:2:8). Cement concrete road is laid over an existing Water Bound Macadam road.

36

Q:

A) M 10 | B) M 15 |

C) M 20 | D) M 35 |

Answer & Explanation
Answer: B) M 15

Explanation: The concrete used for cement concrete roads is of grade M 15 using 20 mm hand broken grade metal. For base course, concrete of 1:4:8 is used using 40 mm HBG metal.

Explanation: The concrete used for cement concrete roads is of grade M 15 using 20 mm hand broken grade metal. For base course, concrete of 1:4:8 is used using 40 mm HBG metal.

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