JE Departmental — Past Questions

JE Departmental • Paper-I

Units of turbidity are:

A) mg / I

B) potassium chloroplatimate units

C) NTU

Turbidity is commonly measured in NTU (Nephelometric Turbidity Units), which is the standard unit used for water clarity assessment. Option b is incorrect because potassium chloroplatinate units are used for color measurement, not turbidity. Option a is incorrect because mg/L is a concentration unit, typically used for dissolved or suspended solids, not for turbidity.

JE Departmental • Paper-I

True or False: SBM-G is Swachh Bharat Mission-Gramin.

F) False

T) True

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'nan' (Option B).

JE Departmental • Paper-I

Water is boiling at:

A) 900C

B) 1000C

C) 1010C

Based on established principles in Mechanical Engineering, the correct and most appropriate choice is '900C' (Option A).

JE Departmental • Paper-I

Most widely used Cement in Mizoram is –

A) White Cement

B) Ordinary Portland Cement

C) Portland Pozzolana Cement

D) Rapid Hardening Cement

Based on established principles in Civil Engineering, the correct and most appropriate choice is 'Rapid Hardening Cement' (Option D).

JE Departmental • Paper-I

The moving part of a centrifugal pump is:

A) Impeller

B) Suction nozzle

C) Stator

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Suction nozzle' (Option B).

JE Departmental • Paper-I

What is full form of TMT bars ?

A) Thermo Modified Tester

B) Thermo Mechanically Treated

C) Thermo Mechanic Tested

D) Thermo Mechanically Twited

TMT stands for Thermo Mechanically Treated. TMT bars are steel reinforcement bars produced by a process involving controlled heating and cooling, which improves strength and ductility. The other options are incorrect because they use wrong words: 'Twited' is misspelled and not the standard term, while 'Thermo Modified Tester' and 'Thermo Mechanic Tested' are not recognized expansions of TMT.

JE Departmental • Paper-I

True or False: Most commonly coagulant used in pumping water supply scheme of Mizoram is PAC.

F) False

T) True

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'nan' (Option B).

JE Departmental • Paper-I

The weight of 40mmG.I. Pipe (M) i/c screwed & socketed in kg/m is:

A) 3.70

B) 3.60

C) 3.90

Based on established principles in Civil Engineering, the correct and most appropriate choice is '3.90' (Option C).

JE Departmental • Paper-I

True or False: Great advantage of slow sand filter is that it requires less space than Rapid Sand Filter.

F) False

T) True

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'nan' (Option B).

JE Departmental • Paper-I

Riser pipe of Mark-III Handpump Tube well is:

A) 32mm

B) 40mm

C) 65mm

Based on established principles in the relevant subject area, the correct and most appropriate choice is '40mm' (Option B).

JE Departmental • Paper-I

Which is the most correct estimate:

A) cube rate estimate

B) plinth area estimate

C) detailed estimate

Based on established principles in Civil Engineering, the correct and most appropriate choice is 'nan' (Option D).

JE Departmental • Paper-I

1 (One) Gallon of Water is equal to:

A) 4.54 Litres

B) 3.79 Litres

C) 4.50 Litres

Based on established principles in the relevant subject area, the correct and most appropriate choice is '4.54 Litres' (Option A).

JE Departmental • Paper-I

Clearing of Rapid Sand Filters is done by –

A) Scrapping the top layer of filter media

B) Backwashing

C) Providing new sand layer

D) All of above

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'All of above' (Option D).

JE Departmental • Paper-I

When the source of water is a reservoir on a mountain and the town is lowest then the system of distribution is:

A) Gravity system

B) Pumping System

C) Combined Gravity & Pumping

The correct answer is **Gravity system**. If the water source is a reservoir on a mountain and the town is at a lower elevation, water will flow naturally from the higher reservoir to the lower distribution area due to gravity, so no pumping is needed. Why the others are incorrect: - **Pumping system**: This is used when water must be lifted from a lower source to a higher level or when gravity flow is not possible. - **Combined Gravity & Pumping**: This is used when part of the supply can flow by gravity and part requires pumping, which is not necessary in this case because the source is already higher than the town.

JE Departmental • Paper-I

In a gravity scheme, the source of water to Service Reservoir Pipe line is called:

A) Distribution Line

B) Feeding Line

C) Gravity Main Line

Based on established principles in the relevant subject area, the correct and most appropriate choice is 'Gravity Main Line' (Option C).

JE Departmental • Paper-I

The weight of 10mm Reinforcement bars of Kg/Rm is:

A) 0.67

B) 0.62

C) 0.69

Based on established principles in Civil Engineering, the correct and most appropriate choice is '0.69' (Option C).