City and Guilds 2330 Level 2.01 Question Paper and Answers
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C&G 2330 202 REVISION QUESTIONS
The relationship between the mass of a body (m), the applied force to the body (F) and the acceleration of the body a. is given by the formula:
a. Force = mass x acceleration, F = m x a
b. mass = Force x acceleration, m = F x a
c. acceleration = mass x Force, a = m x F
d. acceleration = mass / Force, a = m / F answer: a
The SI unit of time is the second. Express 0.00001 seconds in a suitable sub multiple:
a. 10 milliseconds, 10 ms
b. 100 milliseconds, 100 ms
c. 100 microseconds, 100 us
d. 10 microseconds, 10 us answer: d
In a magnetic circuit the magnetic field strength H is expressed in ampere turns/metre. H is calculated using the formula:
a. H = I/nl
b. H = nI/l
c. H = Il/n
d. H = nl/I answer: b
The formula used to calculate the resistance (R) of a conductor, given its length (l), cross sectional area a. and the constant of resistivity (p)
a. R = pl/a
b. R = a/pl
c. R = pa/l
d. R = al/p answer: b
A simple alternator consists of a coil which is rotated in a permanent magnetic field. The emf generated I the rotating coil is connected to a load via:
a. commutator and brushes
b. slip rings and brushes
c. flexible cables
d. slide rails and contacts answer: a
If the input energy and output energy of a machine are known, the percentage efficiency of the machine is calculated using the formula:
a. Efficiency = output energy / input energy x 100/1
b. Efficiency = input energy / output energy x 100/1
c. Efficiency = output energy / input energy x 1/100
d. Efficiency = input energy / output energy x 1/100
The most common material used to manufacture brushes used in a.c. and d.c. rotating machines is
a. copper
b. aluminium
c. bronze
d. carbon answer: d
The material used as an insulator on which overhead lines are suspended from pylons is:
a. glass
b. mica
c. P.V.C.
d. rubber answer: a
Electric current is the flow of negatively charged particles called:
a. protons
b.
C&G 2330 202 REVISION QUESTIONS
The relationship between the mass of a body (m), the applied force to the body (F) and the acceleration of the body a. is given by the formula:
a. Force = mass x acceleration, F = m x a
b. mass = Force x acceleration, m = F x a
c. acceleration = mass x Force, a = m x F
d. acceleration = mass / Force, a = m / F answer: a
The SI unit of time is the second. Express 0.00001 seconds in a suitable sub multiple:
a. 10 milliseconds, 10 ms
b. 100 milliseconds, 100 ms
c. 100 microseconds, 100 us
d. 10 microseconds, 10 us answer: d
In a magnetic circuit the magnetic field strength H is expressed in ampere turns/metre. H is calculated using the formula:
a. H = I/nl
b. H = nI/l
c. H = Il/n
d. H = nl/I answer: b
The formula used to calculate the resistance (R) of a conductor, given its length (l), cross sectional area a. and the constant of resistivity (p)
a. R = pl/a
b. R = a/pl
c. R = pa/l
d. R = al/p answer: b
A simple alternator consists of a coil which is rotated in a permanent magnetic field. The emf generated I the rotating coil is connected to a load via:
a. commutator and brushes
b. slip rings and brushes
c. flexible cables
d. slide rails and contacts answer: a
If the input energy and output energy of a machine are known, the percentage efficiency of the machine is calculated using the formula:
a. Efficiency = output energy / input energy x 100/1
b. Efficiency = input energy / output energy x 100/1
c. Efficiency = output energy / input energy x 1/100
d. Efficiency = input energy / output energy x 1/100
The most common material used to manufacture brushes used in a.c. and d.c. rotating machines is
a. copper
b. aluminium
c. bronze
d. carbon answer: d
The material used as an insulator on which overhead lines are suspended from pylons is:
a. glass
b. mica
c. P.V.C.
d. rubber answer: a
Electric current is the flow of negatively charged particles called:
a. protons
b.