4
Choose the suitable form.
Use an ammeter to measure the amount of current ... in a circuit, a) flowed; b) flowing; c) to flow.
5
Choose the suitable form.
The alternator shaft is coupled to an exciter having a stationary field winding and a rotating three-phase winding . . . to a diode bridge including transient protection.
a) connecting; b) will be connected; c) connected.
6
Choose the suitable form.
The limiting current . . . probably ... a very large temperature coefficient, a) will be having; b) is to have; c) would have.
7
Complete the sentence in such a way that it makes sense.
Counters are fully programmable that is. . .
a) count input is pulsed while the other count input is high;
b) each output may be preset to either level by entering the desired data at the data inputs while the load input is low;
c) the output will change to agree with data inputs independently of the count pulses.
8
Complete the sentence in such a way that it makes sense, the order for delivery of a magnetic controller must contain the following information: a) application, class of protection, type, rated current, number of startings per hour, operating duty, electric wear resistance level, control circuit voltage, settings of thermal protection relays; b) application, type, voltage, rated current, operating duty, vitrified resistors, settings of the thermal protection relays; c) type, protection relays, provision of a built-in disk brake, design version, number of free ends of the shaft, set number, provision of a spares set. >4>>5>6
SHIPBOARD AUTOMATION
SECTION
(4+1+4)
Text
Alarm Measuring System
1. The electronic and alarm measuring systems are designed for centralized supervision of processes on board ships. -
2. Such systems are designed to meet the special requirements in marine applications.
3. The design of the alarm systems comprises a limited number of standard modules, and offers an economical and flexible solution for all system sizes — from small alarm systems with a few channels, to complex systems with data logging and alarm print-out functions.
4. The signals from analog and digital transducers are processed in the system and allow for simple and clear monitoring of process activities. The occurrance of abnormal conditions initiates audible and visual alarm signals.
5. Temperatures, pressures, levels, etc. are sensed by the analog transducers and are represented on a digital display.