Departmental (other) • Engineering Paper-I (Common For Civil, Electrical And Mechanical Engineers)
Which of the following is a biodegradable form of solid waste?
A)
Plastic
B)
Compost
C)
Glass
D)
Dumping
Compost is biodegradable organic solid waste.
Departmental (other) • Engineering Paper-I (Common For Civil, Electrical And Mechanical Engineers)
Indian standard for drinking water as per BIS specification is
A)
IS 20500 - 2000
B)
IS 11700 -2002
C)
IS 10500 -2012
D)
IS 70200 -2017
The BIS drinking-water specification is IS 10500:2012.
Departmental (other) • Engineering Paper-I (Common For Civil, Electrical And Mechanical Engineers)
What happens during the disinfection step at a wastewater treatment plant?
A)
scum and sludge are separated from the liquid wastewater
B)
treatment with chlorine or ultraviolet light to kill pathogens
C)
liquid wastewater is mixed with air to help bacteria breakdown small particles of solid material
D)
large solid things are screened out.
Disinfection treats wastewater with chlorine, UV or similar agents to kill pathogens.
Departmental (other) • Engineering Paper-I (Common For Civil, Electrical And Mechanical Engineers)
The process by which water enters the small pore spaces between particles in soil or rocks is
A)
transpiration
B)
inflitration
C)
precipation
D)
sublimation
Infiltration is the entry of water into soil pores.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Centrifugal pumps transfer energy from
A)
Rotor to fluid
B)
Fluid to rotor
C)
Draft to rotor
D)
Rotor to draft
A centrifugal pump transfers energy from its rotor/impeller to the fluid.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The amount of energy absorbed by a flywheel is determined from the
A)
Torque-Crank angle diagram
B)
Speed-Space diagram
C)
Speed-Energy diagram
D)
Acceleration- Crank angle diagram
Flywheel energy variation is obtained from the turning-moment/torque-crank-angle diagram.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Hydraulic Turbines installed at Serlui B Hydropower Project (3x4MW) of medium head 24 — 180 metre is an example of
A)
Pelton wheel turbine
B)
Tubular turbine
C)
Kaplan turbine
D)
Francis turbine
A medium-head hydro project commonly uses a Francis turbine.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which of the following is NOT the advantages of using a closed Air Refrigeration system?
A)
Compact in construction
B)
Lower coefficient of performance
C)
Lighter in weight
D)
Environmental friendly
A lower coefficient of performance is a disadvantage, so it is NOT an advantage.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which of the following industries should be located near the vicinity of raw materials?
A)
Automobiles
B)
Televisions
C)
Sewing machines
D)
Steel mills
Steel mills are typically located near major raw-material sources because of bulk and weight.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Break-even analysis consists of
A)
Fixed cost
B)
Variable cost
C)
Fixed and variable cost
D)
Operation cost
Break-even analysis considers both fixed and variable costs.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Cutting tool can never have its
A)
Clearance angle- positive
B)
Rake angle - positive
C)
Clearance angle- negative
D)
Rake angle - negative
A cutting tool should not have a negative clearance angle in normal cutting practice.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The water compressibility effect produces traveling waves of pressure and is usually called
A)
water pressure
B)
water impact
C)
water hammer
D)
water force
Pressure waves caused by rapid fluid velocity changes are called water hammer.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The air standard cycle for a Gas-Turbine called
A)
Reheat cycle
B)
Rankine cycle
C)
Brayton cycle
D)
Diesel cycle
The Brayton cycle is the ideal air-standard cycle for gas turbines.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The ratio of work-done per cycle to the stroke volume of the compressor is known as
A)
Compressor capacity
B)
Compression ratio
C)
Compressor efficiency
D)
Mean effective pressure
Work per cycle divided by swept volume corresponds to compressor efficiency in the supplied terminology.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The smaller and generally the driving gear of a pair of mated gears is called
A)
rack
B)
pinion
C)
module
D)
pitch
The smaller gear of a mating pair is the pinion.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which of the following process is used in winter air conditioning?
A)
Cooling and Dehumidification
B)
Dehumidification
C)
Heating and Dehumidification
D)
Heating and Humidification
Winter air conditioning generally requires heating and humidification.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Hydraulic ram is a pump which works
A)
on the principle of centrifugal action
B)
on the principle of reciprocating action
C)
on the principle of water hammer
D)
on the principle of reaction
A hydraulic ram works on the water-hammer principle.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
The pressure of air at the beginning of the compression stroke is......atmospheric pressure
A)
less than
B)
more than
C)
equal to
D)
two times atmospheric pressure
At the beginning of the compression stroke, inlet pressure is approximately atmospheric in a basic reciprocating compressor.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which component of a hydraulic system is used to store the sufficient amount of hydraulic oil?
A)
Rotatory pumps
B)
Oil reservoir
C)
Flow control valve
D)
Pressure gauge
The oil reservoir stores the required hydraulic fluid.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which among the following control the flow rate?
A)
Valve
B)
Pump
C)
Head
D)
Tank pipe
A valve regulates flow rate.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Material handling and plant location is analysed by
A)
bar chart
B)
bin chart
C)
Emerson chart
D)
travel chart
Travel charts help analyze material movement/handling and plant layout/location.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
When large gear reductions are needed gears are used.
A)
bevel
B)
worm
C)
helical
D)
spur
Worm gearing provides large speed reductions in compact arrangements.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
Which of the following is an example of hybrid machining?
A)
Ultrasonic machining
B)
Electron beam machining
C)
Laser beam machining
D)
Ultrasonic assisted electrochemical machining
Ultrasonic-assisted electrochemical machining is a hybrid process.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
In perpetual inventory control, the material is checked as it reaches its
A)
minimum value
B)
maximum value
C)
average value
D)
alarming value
In perpetual inventory control, materials are checked as stock approaches the minimum/reorder level; among the choices, minimum is intended.
Departmental (other) • Engineering Paper-II (Mechanical Engineers Under Electrical Wing)
A cutting tool used to finish and enlarge a hole is known as
A)
Drill
B)
Reamer
C)
Die
D)
Tap
A reamer finishes and slightly enlarges an existing hole.
