VSSC Chemical Operator-Maintenance Mechanic Paper 2017

Vikram Sarabhai Space Centre Chemical Operator-Maintenance Mechanic Paper 2017

The SI unit of energy is
(a) watt
(b) Joule
(c) newton
(d) coulomb

A device used to measure relative humidity
(a) potentiometer
(b) galvanometer
(c) Hygrometer
(d) thermometer

The wavelength of ultraviolet rays is higher than
(a) Gamma rays
(b) infrared rays
(c) microwaves
(d) radio waves

Brass is an alloy of
(a) Cu & Pb
(b) Fe & C
(c) Zn & Pb
(d) Cu & Zn

Poisson’s ratio is defined as
(a) axial strain/lateral strain
(b) Lateral strain/ axial strain
(c) axial stress/ lateral strain
(d) lateral stress/ axial strain

Lubrication is the process used to
(a) Minimize wear in moving parts
(b) Helps in keeping the parts cool
(c) Washes away and carries away dirt
(d) All of the above

Which metal has the highest thermal conductivity?
(a) Age
(b) Al
(c) Cu
(d) W

Woring principle of thermocouple is based on
(a) Kirchoff’s law
(b) Stefan-Boltzmann law
(c) Seebeck effect
(d) Hook’s law

The device used for measuring temperature
(a) Thermocouple
(b) Thermometer
(c) Thermistors
(d) All of the above

A machine used for raising gas to a higher level of pressure
(a) Blower
(b) Compressor
(c) Fan
(d) Pump