Chapter 8 · MCQ Read Mode

Industrial Systems

A hydraulic cylinder of 100 mm bore working at 100 bar develops a force of about:

The component that limits the maximum pressure in a hydraulic system is the:

Meter-out flow control is preferred when the load:

A hydraulic accumulator is used to:

Compared with hydraulic systems, pneumatic systems have:

The FRL unit in a pneumatic system consists of a:

For continuous plant air supply at about 7 bar, the compressor most commonly used today is the:

Intercooling between stages of a reciprocating compressor:

Volumetric efficiency of a reciprocating compressor decreases when:

A 4/3 direction control valve has:

In a regenerative hydraulic circuit, the oil from the rod side is:

A pressure-compensated variable displacement pump is used mainly to:

Compressed air is considered an expensive utility because:

The EMF induced in a transformer winding is given by:

Iron (core) losses in a transformer are:

The efficiency of a transformer is maximum when:

The open-circuit test on a transformer gives mainly the:

The DC motor with the highest starting torque, which should never be started without load, is the:

In a DC motor, the back emf is equal to:

The synchronous speed of a 4-pole induction motor on a 50 Hz supply is:

If a 4-pole, 50 Hz induction motor runs at 1440 rpm, the slip is:

The torque developed by an induction motor varies as:

Star-delta starting of an induction motor reduces the starting current to:

A three-phase synchronous motor:

An over-excited synchronous motor running on no load for power-factor improvement is called a:

The standard low-voltage industrial distribution in Nepal is:

In a water-tube boiler:

Which of the following is a boiler mounting?

An economiser in a boiler plant is used to:

The fusible plug of a boiler melts and puts out the fire when:

Equivalent evaporation of a boiler is expressed as steam produced:

The indirect method of boiler efficiency testing calculates efficiency as:

Excess air in a boiler or furnace should be minimised because it:

Scale formation on boiler tubes leads to:

Blowdown of a boiler is carried out to:

The largest heat loss in a typical fuel-fired furnace is:

Preheating combustion air with a recuperator saves fuel by about:

Maintaining a slightly positive pressure inside a furnace prevents:

In base thermal load matching of a cogeneration plant, the unit is sized for the:

Material handling in a factory:

The unit load principle means:

Which of the following is a disadvantage of using pallets as unit loads?

Conveyors are best suited for:

An overhead travelling (EOT) crane is preferred when:

An AGV (automated guided vehicle) is an example of:

The chart most useful for studying the intensity of movement between departments is the:

Which principle suggests using gravity to move material wherever practicable?

Handling cost per unit is usually reduced most effectively by:

The safe working load (SWL) marked on a crane or sling indicates:

Wire ropes, chains, hooks and slings of lifting equipment require:

In analysing a material-handling problem, the 'three Ms' considered are:

Point-of-use storage of components in a cellular layout mainly reduces:

Load factor of a plant is defined as:

A factory uses 180 000 kWh in a month of 720 hours with a maximum demand of 500 kW. Its load factor is:

The demand factor of an installation is:

The plant capacity factor of a run-of-river hydropower plant in Nepal is typically about:

Levelised cost of energy (LCOE) is:

In a two-part tariff, the two components are:

A time-of-day (TOD) tariff encourages consumers to:

Improving the power factor of an industrial plant with capacitors:

Economic (as distinct from financial) analysis of an energy project:

The organisation responsible for promoting renewable and rural energy in Nepal is:

The theoretical hydropower potential of Nepal is usually quoted as about:

Which of the following is a traditional (non-commercial) energy source?

Energy conservation is often described as the cheapest source of energy because:

The essential feature of a closed-loop control system is:

Which of the following is an open-loop control system?

Proportional control alone usually results in:

The derivative action in a PID controller mainly:

The test signal that represents a constant rate of change of input is the:

Adaptive control in machining adjusts:

An incremental encoder differs from an absolute encoder in that it:

Absolute encoders commonly use Gray code because:

A resolver is preferred over an optical encoder where:

A back-pressure (air-jet) sensor detects the presence of a workpiece because:

A stepper motor is normally used in:

The PLC scan cycle consists of:

In a closed-loop CNC machine, the actual position of the slide is measured by: